./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX --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 7325716246446e6137919cda7fc42ef01fc613ff512d250d81e88f25c6debe0a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:52,723 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:52,797 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 01:03:52,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:52,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:52,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:52,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:52,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:52,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:52,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:52,834 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:52,834 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:52,835 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:52,835 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:52,836 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:52,836 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:52,837 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:52,837 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:52,838 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:52,838 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:52,839 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:52,839 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:52,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:52,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:52,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:52,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:52,842 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:52,842 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:52,843 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:52,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:52,844 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:52,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:52,844 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:52,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:52,845 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:52,845 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:52,845 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:52,846 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:52,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:52,846 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:52,846 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:52,847 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:52,847 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_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7325716246446e6137919cda7fc42ef01fc613ff512d250d81e88f25c6debe0a [2023-11-12 01:03:53,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:53,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:53,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:53,135 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:53,135 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:53,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i [2023-11-12 01:03:56,382 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:56,905 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:56,907 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i [2023-11-12 01:03:56,951 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/data/1e7b07958/37be63e23b294210b845d2f87ed1a2d6/FLAG4ec749f9e [2023-11-12 01:03:56,970 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/data/1e7b07958/37be63e23b294210b845d2f87ed1a2d6 [2023-11-12 01:03:56,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:56,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:56,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:56,984 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:56,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:56,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:56" (1/1) ... [2023-11-12 01:03:56,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3b3e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:56, skipping insertion in model container [2023-11-12 01:03:56,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:56" (1/1) ... [2023-11-12 01:03:57,096 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:58,078 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_2b60bd7d-2218-4b62-bad8-a22914a90d2d/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i[115804,115817] [2023-11-12 01:03:58,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:58,158 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:58,273 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_2b60bd7d-2218-4b62-bad8-a22914a90d2d/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i[115804,115817] [2023-11-12 01:03:58,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:58,318 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:58,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58 WrapperNode [2023-11-12 01:03:58,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:58,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:58,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:58,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:58,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,365 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,452 INFO L138 Inliner]: procedures = 77, calls = 266, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 821 [2023-11-12 01:03:58,452 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:58,453 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:58,453 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:58,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:58,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,527 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:58,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:58,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:58,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:58,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (1/1) ... [2023-11-12 01:03:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:58,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:58,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:58,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b60bd7d-2218-4b62-bad8-a22914a90d2d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:58,657 INFO L130 BoogieDeclarations]: Found specification of procedure kbtab_init [2023-11-12 01:03:58,657 INFO L138 BoogieDeclarations]: Found implementation of procedure kbtab_init [2023-11-12 01:03:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-12 01:03:58,658 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-12 01:03:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:03:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2023-11-12 01:03:58,659 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2023-11-12 01:03:58,659 INFO L130 BoogieDeclarations]: Found specification of procedure kbtab_exit [2023-11-12 01:03:58,660 INFO L138 BoogieDeclarations]: Found implementation of procedure kbtab_exit [2023-11-12 01:03:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-12 01:03:58,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-12 01:03:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:03:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:03:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-12 01:03:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-12 01:03:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 01:03:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 01:03:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2023-11-12 01:03:58,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2023-11-12 01:03:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:03:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-11-12 01:03:58,664 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-11-12 01:03:58,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:03:58,665 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 01:03:58,665 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 01:03:58,665 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 01:03:58,666 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 01:03:58,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:03:58,667 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-12 01:03:58,667 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-12 01:03:58,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2023-11-12 01:03:58,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2023-11-12 01:03:58,668 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-12 01:03:58,668 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-12 01:03:58,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2023-11-12 01:03:58,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2023-11-12 01:03:58,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:58,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:03:58,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:58,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:58,933 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:58,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:59,103 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2023-11-12 01:03:59,176 WARN L817 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-12 01:04:00,294 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2023-11-12 01:04:00,294 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2023-11-12 01:04:00,324 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:04:00,818 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:04:00,818 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 01:04:00,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:04:00 BoogieIcfgContainer [2023-11-12 01:04:00,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:04:00,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:04:00,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:04:00,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:04:00,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:56" (1/3) ... [2023-11-12 01:04:00,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66177416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:04:00, skipping insertion in model container [2023-11-12 01:04:00,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:58" (2/3) ... [2023-11-12 01:04:00,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66177416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:04:00, skipping insertion in model container [2023-11-12 01:04:00,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:04:00" (3/3) ... [2023-11-12 01:04:00,832 INFO L112 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i [2023-11-12 01:04:00,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:04:00,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:04:00,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:04:00,918 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;@7fcf243e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:04:00,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:04:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 85 states have internal predecessors, (106), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-12 01:04:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 01:04:00,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:00,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:00,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:00,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1339573029, now seen corresponding path program 1 times [2023-11-12 01:04:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428671437] [2023-11-12 01:04:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:02,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428671437] [2023-11-12 01:04:02,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428671437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:02,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:02,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:04:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438451038] [2023-11-12 01:04:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:02,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:02,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:04:02,649 INFO L87 Difference]: Start difference. First operand has 123 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 85 states have internal predecessors, (106), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:04:04,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:06,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:06,860 INFO L93 Difference]: Finished difference Result 318 states and 434 transitions. [2023-11-12 01:04:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:04:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-12 01:04:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:06,876 INFO L225 Difference]: With dead ends: 318 [2023-11-12 01:04:06,876 INFO L226 Difference]: Without dead ends: 199 [2023-11-12 01:04:06,882 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 [2023-11-12 01:04:06,890 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 116 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:06,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 232 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-12 01:04:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-12 01:04:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 194. [2023-11-12 01:04:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 127 states have (on average 1.2598425196850394) internal successors, (160), 132 states have internal predecessors, (160), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-12 01:04:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 242 transitions. [2023-11-12 01:04:07,001 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 242 transitions. Word has length 12 [2023-11-12 01:04:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:07,002 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 242 transitions. [2023-11-12 01:04:07,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:04:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 242 transitions. [2023-11-12 01:04:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 01:04:07,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:07,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:04:07,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:07,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1423032512, now seen corresponding path program 1 times [2023-11-12 01:04:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:07,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333347574] [2023-11-12 01:04:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:07,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:08,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333347574] [2023-11-12 01:04:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333347574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:08,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:04:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452018297] [2023-11-12 01:04:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:08,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:08,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:04:08,089 INFO L87 Difference]: Start difference. First operand 194 states and 242 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:04:10,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:11,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:12,013 INFO L93 Difference]: Finished difference Result 453 states and 563 transitions. [2023-11-12 01:04:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:04:12,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-12 01:04:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:12,020 INFO L225 Difference]: With dead ends: 453 [2023-11-12 01:04:12,020 INFO L226 Difference]: Without dead ends: 265 [2023-11-12 01:04:12,022 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 [2023-11-12 01:04:12,024 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 97 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:12,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 225 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-12 01:04:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-12 01:04:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2023-11-12 01:04:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 175 states have internal predecessors, (211), 56 states have call successors, (56), 33 states have call predecessors, (56), 32 states have return successors, (52), 50 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-12 01:04:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 319 transitions. [2023-11-12 01:04:12,057 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 319 transitions. Word has length 13 [2023-11-12 01:04:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:12,058 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 319 transitions. [2023-11-12 01:04:12,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:04:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 319 transitions. [2023-11-12 01:04:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 01:04:12,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:12,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:04:12,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:12,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 228268374, now seen corresponding path program 1 times [2023-11-12 01:04:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:12,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611248197] [2023-11-12 01:04:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:12,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611248197] [2023-11-12 01:04:12,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611248197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:12,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:12,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:04:12,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637083301] [2023-11-12 01:04:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:12,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:12,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:04:12,928 INFO L87 Difference]: Start difference. First operand 259 states and 319 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 01:04:15,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:15,230 INFO L93 Difference]: Finished difference Result 530 states and 666 transitions. [2023-11-12 01:04:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:04:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-12 01:04:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:15,235 INFO L225 Difference]: With dead ends: 530 [2023-11-12 01:04:15,235 INFO L226 Difference]: Without dead ends: 282 [2023-11-12 01:04:15,236 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 [2023-11-12 01:04:15,238 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:15,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 190 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 01:04:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-12 01:04:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2023-11-12 01:04:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 193 states have (on average 1.2538860103626943) internal successors, (242), 198 states have internal predecessors, (242), 56 states have call successors, (56), 33 states have call predecessors, (56), 32 states have return successors, (52), 50 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-12 01:04:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 350 transitions. [2023-11-12 01:04:15,276 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 350 transitions. Word has length 38 [2023-11-12 01:04:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:15,277 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 350 transitions. [2023-11-12 01:04:15,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 01:04:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 350 transitions. [2023-11-12 01:04:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-12 01:04:15,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:15,281 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:15,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:04:15,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:15,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -531180871, now seen corresponding path program 1 times [2023-11-12 01:04:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583537640] [2023-11-12 01:04:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:04:17,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583537640] [2023-11-12 01:04:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583537640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:17,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:04:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317322113] [2023-11-12 01:04:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:17,019 INFO L87 Difference]: Start difference. First operand 282 states and 350 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 01:04:20,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:22,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:22,706 INFO L93 Difference]: Finished difference Result 538 states and 685 transitions. [2023-11-12 01:04:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-11-12 01:04:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:22,710 INFO L225 Difference]: With dead ends: 538 [2023-11-12 01:04:22,710 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 01:04:22,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:22,713 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 173 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:22,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 366 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-11-12 01:04:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 01:04:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 208. [2023-11-12 01:04:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 144 states have internal predecessors, (174), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-12 01:04:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2023-11-12 01:04:22,738 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 56 [2023-11-12 01:04:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:22,739 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2023-11-12 01:04:22,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 01:04:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2023-11-12 01:04:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 01:04:22,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:22,743 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:04:22,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:22,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -405107355, now seen corresponding path program 1 times [2023-11-12 01:04:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:22,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737515656] [2023-11-12 01:04:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 01:04:24,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:24,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737515656] [2023-11-12 01:04:24,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737515656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:24,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:24,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:04:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865612981] [2023-11-12 01:04:24,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:24,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:24,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:24,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:24,648 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 01:04:27,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:31,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:31,377 INFO L93 Difference]: Finished difference Result 435 states and 544 transitions. [2023-11-12 01:04:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:04:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2023-11-12 01:04:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:31,382 INFO L225 Difference]: With dead ends: 435 [2023-11-12 01:04:31,383 INFO L226 Difference]: Without dead ends: 432 [2023-11-12 01:04:31,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:31,384 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 267 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:31,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 522 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 333 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2023-11-12 01:04:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-12 01:04:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 388. [2023-11-12 01:04:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 263 states have (on average 1.247148288973384) internal successors, (328), 268 states have internal predecessors, (328), 79 states have call successors, (79), 46 states have call predecessors, (79), 45 states have return successors, (77), 73 states have call predecessors, (77), 75 states have call successors, (77) [2023-11-12 01:04:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 484 transitions. [2023-11-12 01:04:31,437 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 484 transitions. Word has length 60 [2023-11-12 01:04:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:31,439 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 484 transitions. [2023-11-12 01:04:31,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 01:04:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 484 transitions. [2023-11-12 01:04:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-12 01:04:31,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:31,451 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:04:31,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:31,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -994784828, now seen corresponding path program 1 times [2023-11-12 01:04:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:31,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316160278] [2023-11-12 01:04:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:04:32,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316160278] [2023-11-12 01:04:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316160278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:32,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:32,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:04:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210342291] [2023-11-12 01:04:32,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:32,273 INFO L87 Difference]: Start difference. First operand 388 states and 484 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 01:04:36,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:38,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:38,730 INFO L93 Difference]: Finished difference Result 674 states and 847 transitions. [2023-11-12 01:04:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:04:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 67 [2023-11-12 01:04:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:38,733 INFO L225 Difference]: With dead ends: 674 [2023-11-12 01:04:38,733 INFO L226 Difference]: Without dead ends: 284 [2023-11-12 01:04:38,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:38,741 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 33 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:38,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 442 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2023-11-12 01:04:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-12 01:04:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 271. [2023-11-12 01:04:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 182 states have (on average 1.2362637362637363) internal successors, (225), 187 states have internal predecessors, (225), 60 states have call successors, (60), 29 states have call predecessors, (60), 28 states have return successors, (59), 54 states have call predecessors, (59), 56 states have call successors, (59) [2023-11-12 01:04:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 344 transitions. [2023-11-12 01:04:38,789 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 344 transitions. Word has length 67 [2023-11-12 01:04:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:38,792 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 344 transitions. [2023-11-12 01:04:38,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 01:04:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 344 transitions. [2023-11-12 01:04:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 01:04:38,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:38,795 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:04:38,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:38,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1464080635, now seen corresponding path program 1 times [2023-11-12 01:04:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:38,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623770297] [2023-11-12 01:04:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:38,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:04:41,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:41,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623770297] [2023-11-12 01:04:41,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623770297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:41,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:04:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773748259] [2023-11-12 01:04:41,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:41,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:41,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:41,172 INFO L87 Difference]: Start difference. First operand 271 states and 344 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 01:04:43,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:46,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:48,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:04:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:48,710 INFO L93 Difference]: Finished difference Result 518 states and 668 transitions. [2023-11-12 01:04:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 75 [2023-11-12 01:04:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:48,715 INFO L225 Difference]: With dead ends: 518 [2023-11-12 01:04:48,715 INFO L226 Difference]: Without dead ends: 513 [2023-11-12 01:04:48,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:04:48,716 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 223 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 49 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:48,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 414 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 248 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2023-11-12 01:04:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-11-12 01:04:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 490. [2023-11-12 01:04:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 333 states have (on average 1.2432432432432432) internal successors, (414), 338 states have internal predecessors, (414), 107 states have call successors, (107), 50 states have call predecessors, (107), 49 states have return successors, (113), 101 states have call predecessors, (113), 103 states have call successors, (113) [2023-11-12 01:04:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 634 transitions. [2023-11-12 01:04:48,761 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 634 transitions. Word has length 75 [2023-11-12 01:04:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:48,762 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 634 transitions. [2023-11-12 01:04:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 01:04:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 634 transitions. [2023-11-12 01:04:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 01:04:48,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:48,764 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:48,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:04:48,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:48,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash 284118391, now seen corresponding path program 1 times [2023-11-12 01:04:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:48,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757885392] [2023-11-12 01:04:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 01:04:49,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:49,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757885392] [2023-11-12 01:04:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757885392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:49,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:04:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981999676] [2023-11-12 01:04:49,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:49,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:04:49,792 INFO L87 Difference]: Start difference. First operand 490 states and 634 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)