./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:13:11,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:13:11,917 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-21 22:13:11,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:13:11,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:13:11,965 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:13:11,966 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:13:11,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:13:11,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:13:11,974 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:13:11,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:13:11,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:13:11,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:13:11,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:13:11,977 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:13:11,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:13:11,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:13:11,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:13:11,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:13:11,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:13:11,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:13:11,981 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:13:11,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:13:11,982 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:13:11,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:13:11,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:13:11,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:13:11,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:13:11,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:11,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:13:11,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:13:11,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:13:11,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:13:11,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:13:11,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:13:11,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:13:11,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:13:11,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:13:11,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:13:11,988 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 [2023-11-21 22:13:12,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:13:12,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:13:12,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:13:12,281 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:13:12,281 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:13:12,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-11-21 22:13:15,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:13:15,973 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:13:15,974 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-11-21 22:13:16,012 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/data/d85ca14f3/ef176716341e4fe6a1469567db8762eb/FLAG49887285c [2023-11-21 22:13:16,031 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/data/d85ca14f3/ef176716341e4fe6a1469567db8762eb [2023-11-21 22:13:16,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:13:16,040 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:13:16,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:16,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:13:16,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:13:16,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:16" (1/1) ... [2023-11-21 22:13:16,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c53f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:16, skipping insertion in model container [2023-11-21 22:13:16,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:16" (1/1) ... [2023-11-21 22:13:16,166 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:13:17,436 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_c8647ca5-2c87-4714-9d28-4bbf87590a84/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2023-11-21 22:13:17,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:17,612 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:13:17,989 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_c8647ca5-2c87-4714-9d28-4bbf87590a84/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2023-11-21 22:13:18,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:18,090 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:13:18,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18 WrapperNode [2023-11-21 22:13:18,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:18,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:18,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:13:18,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:13:18,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,312 INFO L138 Inliner]: procedures = 167, calls = 938, calls flagged for inlining = 60, calls inlined = 52, statements flattened = 2063 [2023-11-21 22:13:18,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:18,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:13:18,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:13:18,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:13:18,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,351 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,498 WARN L106 HeapSplitter]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure #Ultimate.C_memcpy is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2023-11-21 22:13:18,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,585 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,613 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:13:18,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:13:18,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:13:18,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:13:18,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (1/1) ... [2023-11-21 22:13:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:18,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:13:18,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:13:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_request [2023-11-21 22:13:18,848 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_request [2023-11-21 22:13:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-21 22:13:18,848 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-21 22:13:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-21 22:13:18,849 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-21 22:13:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_audio_ioctl [2023-11-21 22:13:18,849 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_audio_ioctl [2023-11-21 22:13:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-21 22:13:18,849 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-21 22:13:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-21 22:13:18,851 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-21 22:13:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 22:13:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure ps_set_intr [2023-11-21 22:13:18,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ps_set_intr [2023-11-21 22:13:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_packet [2023-11-21 22:13:18,852 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_packet [2023-11-21 22:13:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 22:13:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 22:13:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:13:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_status [2023-11-21 22:13:18,853 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_status [2023-11-21 22:13:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-21 22:13:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-21 22:13:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-21 22:13:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-21 22:13:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 22:13:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 22:13:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2023-11-21 22:13:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2023-11-21 22:13:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_tray_move [2023-11-21 22:13:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_tray_move [2023-11-21 22:13:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_read [2023-11-21 22:13:18,857 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_read [2023-11-21 22:13:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:13:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-21 22:13:18,858 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-21 22:13:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_check_events [2023-11-21 22:13:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_check_events [2023-11-21 22:13:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 22:13:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 22:13:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_lock_door [2023-11-21 22:13:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_lock_door [2023-11-21 22:13:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:13:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2023-11-21 22:13:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2023-11-21 22:13:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-21 22:13:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-21 22:13:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_check_events [2023-11-21 22:13:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_check_events [2023-11-21 22:13:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-21 22:13:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-21 22:13:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_sleep [2023-11-21 22:13:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_sleep [2023-11-21 22:13:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_wait [2023-11-21 22:13:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_wait [2023-11-21 22:13:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:13:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_atapi [2023-11-21 22:13:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_atapi [2023-11-21 22:13:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pcd_mutex [2023-11-21 22:13:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pcd_mutex [2023-11-21 22:13:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_get_mcn [2023-11-21 22:13:18,863 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_get_mcn [2023-11-21 22:13:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-21 22:13:18,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-21 22:13:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:13:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:13:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_identify [2023-11-21 22:13:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_identify [2023-11-21 22:13:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure next_request [2023-11-21 22:13:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure next_request [2023-11-21 22:13:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:13:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-21 22:13:18,867 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-21 22:13:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_probe [2023-11-21 22:13:18,867 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_probe [2023-11-21 22:13:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_command [2023-11-21 22:13:18,867 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_command [2023-11-21 22:13:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_completion [2023-11-21 22:13:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_completion [2023-11-21 22:13:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:13:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_reset [2023-11-21 22:13:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_reset [2023-11-21 22:13:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:13:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-21 22:13:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-21 22:13:18,869 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-21 22:13:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-21 22:13:18,869 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 22:13:18,870 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 22:13:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-21 22:13:18,870 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-21 22:13:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pcd_mutex [2023-11-21 22:13:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pcd_mutex [2023-11-21 22:13:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-11-21 22:13:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-11-21 22:13:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-21 22:13:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-21 22:13:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2023-11-21 22:13:18,872 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2023-11-21 22:13:18,872 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_reset [2023-11-21 22:13:18,872 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_reset [2023-11-21 22:13:18,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:13:18,872 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_ioctl [2023-11-21 22:13:18,872 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_ioctl [2023-11-21 22:13:18,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 22:13:18,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:13:18,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:13:18,873 INFO L130 BoogieDeclarations]: Found specification of procedure pi_do_claimed [2023-11-21 22:13:18,873 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_do_claimed [2023-11-21 22:13:19,292 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:13:19,296 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:13:25,589 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:13:26,819 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:13:26,820 INFO L308 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-21 22:13:26,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:26 BoogieIcfgContainer [2023-11-21 22:13:26,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:13:26,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:13:26,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:13:26,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:13:26,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:13:16" (1/3) ... [2023-11-21 22:13:26,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a031e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:26, skipping insertion in model container [2023-11-21 22:13:26,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:18" (2/3) ... [2023-11-21 22:13:26,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a031e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:26, skipping insertion in model container [2023-11-21 22:13:26,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:26" (3/3) ... [2023-11-21 22:13:26,834 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-11-21 22:13:26,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:13:26,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:13:26,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:13:26,927 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=PETRI_NET, 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;@5f83d809, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:13:26,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:13:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 609 states, 390 states have (on average 1.4) internal successors, (546), 414 states have internal predecessors, (546), 175 states have call successors, (175), 47 states have call predecessors, (175), 47 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) [2023-11-21 22:13:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:13:26,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:26,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:26,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:26,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -348399817, now seen corresponding path program 1 times [2023-11-21 22:13:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:26,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407320557] [2023-11-21 22:13:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:26,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:27,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407320557] [2023-11-21 22:13:27,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407320557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:27,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:27,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279722604] [2023-11-21 22:13:27,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:27,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:27,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:27,567 INFO L87 Difference]: Start difference. First operand has 609 states, 390 states have (on average 1.4) internal successors, (546), 414 states have internal predecessors, (546), 175 states have call successors, (175), 47 states have call predecessors, (175), 47 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:31,931 INFO L93 Difference]: Finished difference Result 1738 states and 2628 transitions. [2023-11-21 22:13:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:31,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 22:13:31,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:31,968 INFO L225 Difference]: With dead ends: 1738 [2023-11-21 22:13:31,969 INFO L226 Difference]: Without dead ends: 1126 [2023-11-21 22:13:31,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:31,986 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 772 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:31,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1503 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-21 22:13:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2023-11-21 22:13:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1112. [2023-11-21 22:13:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 707 states have (on average 1.3932107496463932) internal successors, (985), 739 states have internal predecessors, (985), 318 states have call successors, (318), 87 states have call predecessors, (318), 86 states have return successors, (312), 301 states have call predecessors, (312), 312 states have call successors, (312) [2023-11-21 22:13:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1615 transitions. [2023-11-21 22:13:32,199 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1615 transitions. Word has length 14 [2023-11-21 22:13:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,200 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1615 transitions. [2023-11-21 22:13:32,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1615 transitions. [2023-11-21 22:13:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:13:32,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:13:32,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1261408017, now seen corresponding path program 1 times [2023-11-21 22:13:32,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112907189] [2023-11-21 22:13:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:13:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112907189] [2023-11-21 22:13:32,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112907189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:32,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:32,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:32,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856356310] [2023-11-21 22:13:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,527 INFO L87 Difference]: Start difference. First operand 1112 states and 1615 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:13:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:35,636 INFO L93 Difference]: Finished difference Result 2814 states and 4063 transitions. [2023-11-21 22:13:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:35,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 22:13:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:35,651 INFO L225 Difference]: With dead ends: 2814 [2023-11-21 22:13:35,651 INFO L226 Difference]: Without dead ends: 1703 [2023-11-21 22:13:35,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:35,658 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 740 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:35,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 1387 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-21 22:13:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-21 22:13:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1689. [2023-11-21 22:13:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1060 states have (on average 1.3754716981132076) internal successors, (1458), 1107 states have internal predecessors, (1458), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-21 22:13:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2430 transitions. [2023-11-21 22:13:35,769 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2430 transitions. Word has length 16 [2023-11-21 22:13:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:35,769 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2430 transitions. [2023-11-21 22:13:35,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:13:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2430 transitions. [2023-11-21 22:13:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:13:35,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:35,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:35,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:13:35,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:35,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1546976143, now seen corresponding path program 1 times [2023-11-21 22:13:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:35,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652330333] [2023-11-21 22:13:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:36,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652330333] [2023-11-21 22:13:36,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652330333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:36,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:36,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:36,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320232805] [2023-11-21 22:13:36,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:36,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:36,075 INFO L87 Difference]: Start difference. First operand 1689 states and 2430 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:37,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:13:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:39,399 INFO L93 Difference]: Finished difference Result 3138 states and 4504 transitions. [2023-11-21 22:13:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:39,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:13:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:39,417 INFO L225 Difference]: With dead ends: 3138 [2023-11-21 22:13:39,417 INFO L226 Difference]: Without dead ends: 1689 [2023-11-21 22:13:39,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:39,431 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 847 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:39,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 751 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-21 22:13:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2023-11-21 22:13:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2023-11-21 22:13:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1060 states have (on average 1.3735849056603773) internal successors, (1456), 1107 states have internal predecessors, (1456), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-21 22:13:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2428 transitions. [2023-11-21 22:13:39,592 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2428 transitions. Word has length 15 [2023-11-21 22:13:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:39,593 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2428 transitions. [2023-11-21 22:13:39,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2428 transitions. [2023-11-21 22:13:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 22:13:39,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:39,597 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] [2023-11-21 22:13:39,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:13:39,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:39,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:39,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2141124752, now seen corresponding path program 1 times [2023-11-21 22:13:39,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:39,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782486978] [2023-11-21 22:13:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:13:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782486978] [2023-11-21 22:13:39,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782486978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:39,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:39,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:39,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245849362] [2023-11-21 22:13:39,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:39,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:39,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:39,896 INFO L87 Difference]: Start difference. First operand 1689 states and 2428 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:13:42,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:13:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:44,262 INFO L93 Difference]: Finished difference Result 3152 states and 4522 transitions. [2023-11-21 22:13:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:44,263 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-21 22:13:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:44,276 INFO L225 Difference]: With dead ends: 3152 [2023-11-21 22:13:44,276 INFO L226 Difference]: Without dead ends: 1703 [2023-11-21 22:13:44,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:44,285 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 9 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:44,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1499 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-21 22:13:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-21 22:13:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1691. [2023-11-21 22:13:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1062 states have (on average 1.3728813559322033) internal successors, (1458), 1109 states have internal predecessors, (1458), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-21 22:13:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2430 transitions. [2023-11-21 22:13:44,450 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2430 transitions. Word has length 25 [2023-11-21 22:13:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:44,451 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2430 transitions. [2023-11-21 22:13:44,451 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:13:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2430 transitions. [2023-11-21 22:13:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:13:44,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:44,453 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] [2023-11-21 22:13:44,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:13:44,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:44,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1852900651, now seen corresponding path program 1 times [2023-11-21 22:13:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:44,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160745773] [2023-11-21 22:13:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:44,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:13:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:44,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:44,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160745773] [2023-11-21 22:13:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160745773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:44,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022956786] [2023-11-21 22:13:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:44,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:44,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:44,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:13:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:45,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:45,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:13:45,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:45,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022956786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:45,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 22:13:45,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329431871] [2023-11-21 22:13:45,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:45,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:45,261 INFO L87 Difference]: Start difference. First operand 1691 states and 2430 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2023-11-21 22:13:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:48,934 INFO L93 Difference]: Finished difference Result 3170 states and 4550 transitions. [2023-11-21 22:13:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:48,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2023-11-21 22:13:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:48,955 INFO L225 Difference]: With dead ends: 3170 [2023-11-21 22:13:48,955 INFO L226 Difference]: Without dead ends: 1719 [2023-11-21 22:13:48,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:48,964 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 11 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:48,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1502 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-21 22:13:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2023-11-21 22:13:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1695. [2023-11-21 22:13:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1066 states have (on average 1.3714821763602252) internal successors, (1462), 1113 states have internal predecessors, (1462), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-21 22:13:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2434 transitions. [2023-11-21 22:13:49,092 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2434 transitions. Word has length 28 [2023-11-21 22:13:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:49,093 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2434 transitions. [2023-11-21 22:13:49,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2023-11-21 22:13:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2434 transitions. [2023-11-21 22:13:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:13:49,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:49,097 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] [2023-11-21 22:13:49,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:49,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:49,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1969441523, now seen corresponding path program 1 times [2023-11-21 22:13:49,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:49,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349433637] [2023-11-21 22:13:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:49,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:13:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 22:13:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:49,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349433637] [2023-11-21 22:13:49,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349433637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:49,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669016450] [2023-11-21 22:13:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:49,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:49,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:49,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:13:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:50,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:13:50,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:13:50,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669016450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:50,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:50,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 22:13:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137030007] [2023-11-21 22:13:50,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:50,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:50,242 INFO L87 Difference]: Start difference. First operand 1695 states and 2434 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:13:52,601 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 [] [2023-11-21 22:13:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:54,839 INFO L93 Difference]: Finished difference Result 3176 states and 4554 transitions. [2023-11-21 22:13:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-21 22:13:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:54,857 INFO L225 Difference]: With dead ends: 3176 [2023-11-21 22:13:54,857 INFO L226 Difference]: Without dead ends: 1721 [2023-11-21 22:13:54,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:54,867 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 21 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:54,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1482 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-21 22:13:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-21 22:13:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2023-11-21 22:13:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1084 states have (on average 1.3726937269372694) internal successors, (1488), 1131 states have internal predecessors, (1488), 495 states have call successors, (495), 140 states have call predecessors, (495), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-21 22:13:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2472 transitions. [2023-11-21 22:13:54,985 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2472 transitions. Word has length 32 [2023-11-21 22:13:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:54,986 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2472 transitions. [2023-11-21 22:13:54,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:13:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2472 transitions. [2023-11-21 22:13:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 22:13:54,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:54,992 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:13:55,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:55,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:13:55,214 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:55,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash -920880691, now seen corresponding path program 1 times [2023-11-21 22:13:55,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:55,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19424732] [2023-11-21 22:13:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:55,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:55,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:13:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:55,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 22:13:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:55,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-21 22:13:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:55,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:13:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:55,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19424732] [2023-11-21 22:13:55,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19424732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:55,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093260059] [2023-11-21 22:13:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:55,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:55,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:13:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:56,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:13:56,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:13:56,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:56,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093260059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:56,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 22:13:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516316519] [2023-11-21 22:13:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:56,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:56,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:56,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:56,211 INFO L87 Difference]: Start difference. First operand 1719 states and 2472 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:13:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:58,339 INFO L93 Difference]: Finished difference Result 1721 states and 2473 transitions. [2023-11-21 22:13:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-11-21 22:13:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:58,357 INFO L225 Difference]: With dead ends: 1721 [2023-11-21 22:13:58,357 INFO L226 Difference]: Without dead ends: 1718 [2023-11-21 22:13:58,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:58,360 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 815 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:58,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 749 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-21 22:13:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2023-11-21 22:13:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2023-11-21 22:13:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1084 states have (on average 1.371771217712177) internal successors, (1487), 1130 states have internal predecessors, (1487), 494 states have call successors, (494), 140 states have call predecessors, (494), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-21 22:13:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2470 transitions. [2023-11-21 22:13:58,501 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2470 transitions. Word has length 42 [2023-11-21 22:13:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:58,502 INFO L495 AbstractCegarLoop]: Abstraction has 1718 states and 2470 transitions. [2023-11-21 22:13:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:13:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2470 transitions. [2023-11-21 22:13:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:13:58,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:58,506 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:13:58,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:13:58,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:58,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1517096528, now seen corresponding path program 1 times [2023-11-21 22:13:58,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:58,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392818889] [2023-11-21 22:13:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:58,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:13:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 22:13:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-21 22:13:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:13:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:58,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392818889] [2023-11-21 22:13:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392818889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865020351] [2023-11-21 22:13:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:58,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:58,988 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:59,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:13:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:59,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:13:59,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:13:59,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865020351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 22:13:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980737059] [2023-11-21 22:13:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:59,676 INFO L87 Difference]: Start difference. First operand 1718 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:14:00,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:14:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:01,972 INFO L93 Difference]: Finished difference Result 1720 states and 2471 transitions. [2023-11-21 22:14:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:14:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-11-21 22:14:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:01,986 INFO L225 Difference]: With dead ends: 1720 [2023-11-21 22:14:01,987 INFO L226 Difference]: Without dead ends: 1717 [2023-11-21 22:14:01,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:14:01,989 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 812 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:01,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 747 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 22:14:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2023-11-21 22:14:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1717. [2023-11-21 22:14:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1084 states have (on average 1.3708487084870848) internal successors, (1486), 1129 states have internal predecessors, (1486), 493 states have call successors, (493), 140 states have call predecessors, (493), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-21 22:14:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2468 transitions. [2023-11-21 22:14:02,119 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2468 transitions. Word has length 43 [2023-11-21 22:14:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:02,120 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2468 transitions. [2023-11-21 22:14:02,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:14:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2468 transitions. [2023-11-21 22:14:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:14:02,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:02,124 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:14:02,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:02,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:02,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:02,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -215016144, now seen corresponding path program 1 times [2023-11-21 22:14:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099129482] [2023-11-21 22:14:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:02,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:14:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:02,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 22:14:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:02,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-21 22:14:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:14:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:14:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:02,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099129482] [2023-11-21 22:14:02,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099129482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:02,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740672029] [2023-11-21 22:14:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:02,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:02,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:02,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:02,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8647ca5-2c87-4714-9d28-4bbf87590a84/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:14:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:14:03,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:14:03,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:14:03,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740672029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:03,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:14:03,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 22:14:03,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23222174] [2023-11-21 22:14:03,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:14:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:14:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:14:03,187 INFO L87 Difference]: Start difference. First operand 1717 states and 2468 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)