./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f0f6d4d806244ea3cd1017e40765f88a5cfdbdb015e9bc282de078894fc197b0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:47:35,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:47:35,680 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 15:47:35,684 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:47:35,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:47:35,705 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:47:35,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:47:35,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:47:35,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:47:35,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:47:35,708 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:47:35,709 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:47:35,710 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:47:35,710 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:47:35,711 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:47:35,711 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:47:35,712 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:47:35,712 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:47:35,713 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:47:35,713 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:47:35,714 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:47:35,715 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:47:35,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:47:35,717 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:47:35,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:47:35,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:47:35,718 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:47:35,718 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:47:35,719 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:47:35,719 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:47:35,720 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:47:35,720 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:47:35,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:47:35,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:47:35,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:47:35,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:47:35,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:47:35,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:47:35,722 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:47:35,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:47:35,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:47:35,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:47:35,722 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:47:35,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:47:35,723 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0f6d4d806244ea3cd1017e40765f88a5cfdbdb015e9bc282de078894fc197b0 [2023-12-02 15:47:35,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:47:35,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:47:35,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:47:35,944 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:47:35,944 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:47:35,945 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i [2023-12-02 15:47:38,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:47:39,178 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:47:39,178 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i [2023-12-02 15:47:39,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/data/fd815f6ac/85deabaf310c45da993aedde4cbfe079/FLAG1290f1e49 [2023-12-02 15:47:39,229 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/data/fd815f6ac/85deabaf310c45da993aedde4cbfe079 [2023-12-02 15:47:39,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:47:39,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:47:39,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:47:39,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:47:39,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:47:39,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:47:39" (1/1) ... [2023-12-02 15:47:39,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5248e86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:39, skipping insertion in model container [2023-12-02 15:47:39,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:47:39" (1/1) ... [2023-12-02 15:47:39,381 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:47:39,786 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name match at C: (*match)(struct device * , struct v4l2_async_subdev * ) [4976] [2023-12-02 15:47:40,114 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_b7154459-8584-43d6-99d9-6a49aba01a18/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i[172166,172179] [2023-12-02 15:47:41,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:47:41,234 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:47:41,382 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name match at C: (*match)(struct device * , struct v4l2_async_subdev * ) [4976] [2023-12-02 15:47:41,412 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i[172166,172179] [2023-12-02 15:47:41,462 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6560] [2023-12-02 15:47:41,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:47:41,932 WARN L675 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 15:47:41,933 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 15:47:41,941 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:47:41,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41 WrapperNode [2023-12-02 15:47:41,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:47:41,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:47:41,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:47:41,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:47:41,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:42,044 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:43,882 INFO L138 Inliner]: procedures = 249, calls = 5602, calls flagged for inlining = 130, calls inlined = 130, statements flattened = 11231 [2023-12-02 15:47:43,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:47:43,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:47:43,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:47:43,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:47:43,893 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:43,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:44,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:44,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:46,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:46,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:46,077 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:46,099 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:46,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:47:46,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:47:46,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:47:46,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:47:46,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (1/1) ... [2023-12-02 15:47:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:47:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:47:46,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:47:46,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:47:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-12-02 15:47:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-12-02 15:47:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_reset_ac97 [2023-12-02 15:47:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_reset_ac97 [2023-12-02 15:47:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_ops_wait_finish [2023-12-02 15:47:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_ops_wait_finish [2023-12-02 15:47:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_poll [2023-12-02 15:47:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_fop_poll [2023-12-02 15:47:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 15:47:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 15:47:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 15:47:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 15:47:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-12-02 15:47:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-12-02 15:47:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-12-02 15:47:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-12-02 15:47:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_mmap [2023-12-02 15:47:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_fop_mmap [2023-12-02 15:47:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure start_streaming [2023-12-02 15:47:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure start_streaming [2023-12-02 15:47:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 15:47:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 15:47:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_is_busy [2023-12-02 15:47:46,214 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_is_busy [2023-12-02 15:47:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_clear_queue [2023-12-02 15:47:46,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_clear_queue [2023-12-02 15:47:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2023-12-02 15:47:46,214 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2023-12-02 15:47:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_cancel_isoc [2023-12-02 15:47:46,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_cancel_isoc [2023-12-02 15:47:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 15:47:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 15:47:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 15:47:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 15:47:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_device_unregister [2023-12-02 15:47:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_device_unregister [2023-12-02 15:47:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 15:47:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 15:47:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 15:47:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 15:47:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_select_input [2023-12-02 15:47:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_select_input [2023-12-02 15:47:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___3 [2023-12-02 15:47:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___3 [2023-12-02 15:47:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-12-02 15:47:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-12-02 15:47:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure video_drvdata [2023-12-02 15:47:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure video_drvdata [2023-12-02 15:47:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_2 [2023-12-02 15:47:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_2 [2023-12-02 15:47:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:47:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-12-02 15:47:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_free_isoc [2023-12-02 15:47:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_free_isoc [2023-12-02 15:47:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 15:47:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_12 [2023-12-02 15:47:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_12 [2023-12-02 15:47:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_handler_free [2023-12-02 15:47:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_handler_free [2023-12-02 15:47:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 15:47:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 15:47:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-12-02 15:47:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-12-02 15:47:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:47:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 15:47:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 15:47:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 15:47:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_write_reg [2023-12-02 15:47:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_write_reg [2023-12-02 15:47:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-12-02 15:47:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-12-02 15:47:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2023-12-02 15:47:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2023-12-02 15:47:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-12-02 15:47:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-12-02 15:47:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-12-02 15:47:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-12-02 15:47:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-12-02 15:47:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-12-02 15:47:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-12-02 15:47:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-12-02 15:47:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_i2c_busy_wait [2023-12-02 15:47:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_i2c_busy_wait [2023-12-02 15:47:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~v4l2_std_id~0~TO~int [2023-12-02 15:47:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~v4l2_std_id~0~TO~int [2023-12-02 15:47:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_try_fmt_vid_cap [2023-12-02 15:47:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_try_fmt_vid_cap [2023-12-02 15:47:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_probe [2023-12-02 15:47:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_probe [2023-12-02 15:47:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 15:47:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-12-02 15:47:46,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-12-02 15:47:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_buffer_done [2023-12-02 15:47:46,222 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_buffer_done [2023-12-02 15:47:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-12-02 15:47:46,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-12-02 15:47:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure video_ioctl2 [2023-12-02 15:47:46,222 INFO L138 BoogieDeclarations]: Found implementation of procedure video_ioctl2 [2023-12-02 15:47:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_ops_wait_prepare [2023-12-02 15:47:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_ops_wait_prepare [2023-12-02 15:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure video_device_release_empty [2023-12-02 15:47:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure video_device_release_empty [2023-12-02 15:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-12-02 15:47:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-12-02 15:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 15:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-12-02 15:47:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-12-02 15:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 15:47:46,224 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 15:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-12-02 15:47:46,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-12-02 15:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_read_reg [2023-12-02 15:47:46,224 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_read_reg [2023-12-02 15:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 15:47:46,224 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 15:47:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:47:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2023-12-02 15:47:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_subscribe_event [2023-12-02 15:47:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_set_std [2023-12-02 15:47:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_set_std [2023-12-02 15:47:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 15:47:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 15:47:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_start_streaming [2023-12-02 15:47:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_start_streaming [2023-12-02 15:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_i2c_unregister [2023-12-02 15:47:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_i2c_unregister [2023-12-02 15:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-12-02 15:47:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-12-02 15:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 15:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_uninit_isoc [2023-12-02 15:47:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_uninit_isoc [2023-12-02 15:47:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 15:47:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 15:47:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure ___ratelimit [2023-12-02 15:47:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ___ratelimit [2023-12-02 15:47:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_get_drv_priv [2023-12-02 15:47:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_get_drv_priv [2023-12-02 15:47:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-12-02 15:47:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-12-02 15:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_queue [2023-12-02 15:47:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_queue [2023-12-02 15:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_log_status [2023-12-02 15:47:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_log_status [2023-12-02 15:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure print_err_status [2023-12-02 15:47:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure print_err_status [2023-12-02 15:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_free [2023-12-02 15:47:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_free [2023-12-02 15:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2023-12-02 15:47:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_event_unsubscribe [2023-12-02 15:47:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-12-02 15:47:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-12-02 15:47:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-12-02 15:47:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-12-02 15:47:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:47:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_disconnect [2023-12-02 15:47:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_disconnect [2023-12-02 15:47:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure stk1160_isoc_irq [2023-12-02 15:47:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stk1160_isoc_irq [2023-12-02 15:47:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-12-02 15:47:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:47:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:47:47,111 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:47:47,115 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:47:47,908 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 15:48:13,143 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___3FINAL: assume true; [2023-12-02 15:48:22,420 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:48:23,782 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:48:23,782 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 15:48:23,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:48:23 BoogieIcfgContainer [2023-12-02 15:48:23,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:48:23,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:48:23,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:48:23,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:48:23,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:47:39" (1/3) ... [2023-12-02 15:48:23,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40defd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:48:23, skipping insertion in model container [2023-12-02 15:48:23,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:47:41" (2/3) ... [2023-12-02 15:48:23,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40defd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:48:23, skipping insertion in model container [2023-12-02 15:48:23,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:48:23" (3/3) ... [2023-12-02 15:48:23,794 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--media--usb--stk1160--stk1160.ko-entry_point.cil.out.i [2023-12-02 15:48:23,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:48:23,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:48:23,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:48:23,895 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75708356, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:48:23,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:48:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 1151 states, 743 states have (on average 1.3795423956931359) internal successors, (1025), 776 states have internal predecessors, (1025), 335 states have call successors, (335), 73 states have call predecessors, (335), 71 states have return successors, (324), 317 states have call predecessors, (324), 324 states have call successors, (324) [2023-12-02 15:48:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:48:23,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:48:23,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:48:23,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:48:23,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:48:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash 577122488, now seen corresponding path program 1 times [2023-12-02 15:48:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:48:23,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344620315] [2023-12-02 15:48:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:48:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:48:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:48:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:48:25,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:48:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344620315] [2023-12-02 15:48:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344620315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:48:25,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:48:25,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:48:25,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332369124] [2023-12-02 15:48:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:48:25,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:48:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:48:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:48:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:48:25,105 INFO L87 Difference]: Start difference. First operand has 1151 states, 743 states have (on average 1.3795423956931359) internal successors, (1025), 776 states have internal predecessors, (1025), 335 states have call successors, (335), 73 states have call predecessors, (335), 71 states have return successors, (324), 317 states have call predecessors, (324), 324 states have call successors, (324) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-12-02 15:48:29,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:31,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:35,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:37,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:40,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:42,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:48:44,394 INFO L93 Difference]: Finished difference Result 3408 states and 4996 transitions. [2023-12-02 15:48:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:48:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2023-12-02 15:48:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:48:44,426 INFO L225 Difference]: With dead ends: 3408 [2023-12-02 15:48:44,426 INFO L226 Difference]: Without dead ends: 2232 [2023-12-02 15:48:44,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:48:44,440 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 1613 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:48:44,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1613 Valid, 2992 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 359 Invalid, 6 Unknown, 0 Unchecked, 19.1s Time] [2023-12-02 15:48:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2023-12-02 15:48:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2232. [2023-12-02 15:48:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 1459 states have (on average 1.361206305688828) internal successors, (1986), 1495 states have internal predecessors, (1986), 632 states have call successors, (632), 141 states have call predecessors, (632), 140 states have return successors, (627), 613 states have call predecessors, (627), 627 states have call successors, (627) [2023-12-02 15:48:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3245 transitions. [2023-12-02 15:48:44,638 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3245 transitions. Word has length 22 [2023-12-02 15:48:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:48:44,639 INFO L495 AbstractCegarLoop]: Abstraction has 2232 states and 3245 transitions. [2023-12-02 15:48:44,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-12-02 15:48:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3245 transitions. [2023-12-02 15:48:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:48:44,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:48:44,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:48:44,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:48:44,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:48:44,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:48:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1518217438, now seen corresponding path program 1 times [2023-12-02 15:48:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:48:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051756508] [2023-12-02 15:48:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:48:44,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:48:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:48:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:48:45,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:48:45,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051756508] [2023-12-02 15:48:45,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051756508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:48:45,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:48:45,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:48:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981588039] [2023-12-02 15:48:45,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:48:45,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:48:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:48:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:48:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:48:45,590 INFO L87 Difference]: Start difference. First operand 2232 states and 3245 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:48:49,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:51,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:56,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:48:58,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:00,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:02,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:05,529 INFO L93 Difference]: Finished difference Result 4421 states and 6437 transitions. [2023-12-02 15:49:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:05,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-12-02 15:49:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:05,564 INFO L225 Difference]: With dead ends: 4421 [2023-12-02 15:49:05,565 INFO L226 Difference]: Without dead ends: 4418 [2023-12-02 15:49:05,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:05,570 INFO L413 NwaCegarLoop]: 1475 mSDtfsCounter, 1595 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:05,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 2946 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 6 Unknown, 0 Unchecked, 19.7s Time] [2023-12-02 15:49:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2023-12-02 15:49:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4406. [2023-12-02 15:49:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 2883 states have (on average 1.3614290669441553) internal successors, (3925), 2953 states have internal predecessors, (3925), 1242 states have call successors, (1242), 281 states have call predecessors, (1242), 280 states have return successors, (1253), 1207 states have call predecessors, (1253), 1237 states have call successors, (1253) [2023-12-02 15:49:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6420 transitions. [2023-12-02 15:49:05,886 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6420 transitions. Word has length 30 [2023-12-02 15:49:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:05,887 INFO L495 AbstractCegarLoop]: Abstraction has 4406 states and 6420 transitions. [2023-12-02 15:49:05,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6420 transitions. [2023-12-02 15:49:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 15:49:05,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:05,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:05,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:49:05,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:05,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 179269343, now seen corresponding path program 1 times [2023-12-02 15:49:05,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:05,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470302335] [2023-12-02 15:49:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:49:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:49:06,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:06,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470302335] [2023-12-02 15:49:06,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470302335] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:06,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:06,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:49:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215404800] [2023-12-02 15:49:06,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:06,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:49:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:06,956 INFO L87 Difference]: Start difference. First operand 4406 states and 6420 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:10,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:12,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:14,199 INFO L93 Difference]: Finished difference Result 4408 states and 6421 transitions. [2023-12-02 15:49:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-12-02 15:49:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:14,223 INFO L225 Difference]: With dead ends: 4408 [2023-12-02 15:49:14,223 INFO L226 Difference]: Without dead ends: 4405 [2023-12-02 15:49:14,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:14,227 INFO L413 NwaCegarLoop]: 1471 mSDtfsCounter, 1629 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:14,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 1471 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 15:49:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4405 states. [2023-12-02 15:49:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4405 to 4405. [2023-12-02 15:49:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4405 states, 2883 states have (on average 1.3610822060353798) internal successors, (3924), 2952 states have internal predecessors, (3924), 1241 states have call successors, (1241), 281 states have call predecessors, (1241), 280 states have return successors, (1253), 1207 states have call predecessors, (1253), 1237 states have call successors, (1253) [2023-12-02 15:49:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4405 states to 4405 states and 6418 transitions. [2023-12-02 15:49:14,454 INFO L78 Accepts]: Start accepts. Automaton has 4405 states and 6418 transitions. Word has length 31 [2023-12-02 15:49:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:14,454 INFO L495 AbstractCegarLoop]: Abstraction has 4405 states and 6418 transitions. [2023-12-02 15:49:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4405 states and 6418 transitions. [2023-12-02 15:49:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 15:49:14,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:14,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:14,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:49:14,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:14,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1261756869, now seen corresponding path program 1 times [2023-12-02 15:49:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491934411] [2023-12-02 15:49:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:49:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:49:15,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:15,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491934411] [2023-12-02 15:49:15,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491934411] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:15,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:15,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:49:15,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692935760] [2023-12-02 15:49:15,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:15,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:15,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:49:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:15,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:15,036 INFO L87 Difference]: Start difference. First operand 4405 states and 6418 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:19,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:21,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:23,433 INFO L93 Difference]: Finished difference Result 4407 states and 6419 transitions. [2023-12-02 15:49:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-12-02 15:49:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:23,455 INFO L225 Difference]: With dead ends: 4407 [2023-12-02 15:49:23,455 INFO L226 Difference]: Without dead ends: 4404 [2023-12-02 15:49:23,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:23,458 INFO L413 NwaCegarLoop]: 1469 mSDtfsCounter, 1626 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:23,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1626 Valid, 1469 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2023-12-02 15:49:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2023-12-02 15:49:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 4404. [2023-12-02 15:49:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 2883 states have (on average 1.3607353451266042) internal successors, (3923), 2951 states have internal predecessors, (3923), 1240 states have call successors, (1240), 281 states have call predecessors, (1240), 280 states have return successors, (1253), 1207 states have call predecessors, (1253), 1237 states have call successors, (1253) [2023-12-02 15:49:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 6416 transitions. [2023-12-02 15:49:23,779 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 6416 transitions. Word has length 32 [2023-12-02 15:49:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:23,779 INFO L495 AbstractCegarLoop]: Abstraction has 4404 states and 6416 transitions. [2023-12-02 15:49:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 6416 transitions. [2023-12-02 15:49:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:49:23,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:23,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:23,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:49:23,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:23,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 459136674, now seen corresponding path program 1 times [2023-12-02 15:49:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:23,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148115986] [2023-12-02 15:49:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:49:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:49:24,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:24,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148115986] [2023-12-02 15:49:24,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148115986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:24,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:24,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:49:24,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309475903] [2023-12-02 15:49:24,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:24,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:24,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:49:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:24,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:24,444 INFO L87 Difference]: Start difference. First operand 4404 states and 6416 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:27,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:30,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:31,734 INFO L93 Difference]: Finished difference Result 4406 states and 6417 transitions. [2023-12-02 15:49:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:31,735 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-12-02 15:49:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:31,755 INFO L225 Difference]: With dead ends: 4406 [2023-12-02 15:49:31,756 INFO L226 Difference]: Without dead ends: 4403 [2023-12-02 15:49:31,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:31,758 INFO L413 NwaCegarLoop]: 1467 mSDtfsCounter, 1623 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:31,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1623 Valid, 1467 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 15:49:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2023-12-02 15:49:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 4403. [2023-12-02 15:49:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 2883 states have (on average 1.3603884842178287) internal successors, (3922), 2950 states have internal predecessors, (3922), 1239 states have call successors, (1239), 281 states have call predecessors, (1239), 280 states have return successors, (1253), 1207 states have call predecessors, (1253), 1237 states have call successors, (1253) [2023-12-02 15:49:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 6414 transitions. [2023-12-02 15:49:32,091 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 6414 transitions. Word has length 33 [2023-12-02 15:49:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:32,092 INFO L495 AbstractCegarLoop]: Abstraction has 4403 states and 6414 transitions. [2023-12-02 15:49:32,092 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 6414 transitions. [2023-12-02 15:49:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:49:32,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:32,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:32,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:49:32,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:32,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1347719272, now seen corresponding path program 1 times [2023-12-02 15:49:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:32,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226396549] [2023-12-02 15:49:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:32,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:49:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:49:32,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:32,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226396549] [2023-12-02 15:49:32,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226396549] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:32,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:32,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:49:32,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428293735] [2023-12-02 15:49:32,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:49:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:32,719 INFO L87 Difference]: Start difference. First operand 4403 states and 6414 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:36,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:38,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:40,576 INFO L93 Difference]: Finished difference Result 4405 states and 6415 transitions. [2023-12-02 15:49:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:40,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-12-02 15:49:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:40,605 INFO L225 Difference]: With dead ends: 4405 [2023-12-02 15:49:40,606 INFO L226 Difference]: Without dead ends: 4396 [2023-12-02 15:49:40,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:40,609 INFO L413 NwaCegarLoop]: 1466 mSDtfsCounter, 1620 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:40,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1620 Valid, 1466 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2023-12-02 15:49:40,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2023-12-02 15:49:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 4396. [2023-12-02 15:49:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4396 states, 2877 states have (on average 1.3600973236009732) internal successors, (3913), 2943 states have internal predecessors, (3913), 1238 states have call successors, (1238), 281 states have call predecessors, (1238), 280 states have return successors, (1253), 1207 states have call predecessors, (1253), 1237 states have call successors, (1253) [2023-12-02 15:49:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4396 states to 4396 states and 6404 transitions. [2023-12-02 15:49:40,868 INFO L78 Accepts]: Start accepts. Automaton has 4396 states and 6404 transitions. Word has length 34 [2023-12-02 15:49:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:40,868 INFO L495 AbstractCegarLoop]: Abstraction has 4396 states and 6404 transitions. [2023-12-02 15:49:40,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:49:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4396 states and 6404 transitions. [2023-12-02 15:49:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-12-02 15:49:40,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:40,880 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:40,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:49:40,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:40,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1298522518, now seen corresponding path program 1 times [2023-12-02 15:49:40,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:40,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311828516] [2023-12-02 15:49:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:49:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:41,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:41,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311828516] [2023-12-02 15:49:41,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 15:49:41,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027516284] [2023-12-02 15:49:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:41,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:49:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:49:41,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:49:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:49:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:43,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 5570 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:49:43,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-12-02 15:49:43,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:49:43,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027516284] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:43,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:43,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:49:43,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327270014] [2023-12-02 15:49:43,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:49:43,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:43,351 INFO L87 Difference]: Start difference. First operand 4396 states and 6404 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-12-02 15:49:48,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:50,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:53,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:55,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:49:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:59,158 INFO L93 Difference]: Finished difference Result 6669 states and 9745 transitions. [2023-12-02 15:49:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 210 [2023-12-02 15:49:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:59,179 INFO L225 Difference]: With dead ends: 6669 [2023-12-02 15:49:59,179 INFO L226 Difference]: Without dead ends: 4448 [2023-12-02 15:49:59,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:59,189 INFO L413 NwaCegarLoop]: 1457 mSDtfsCounter, 11 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:59,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2908 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 366 Invalid, 4 Unknown, 0 Unchecked, 15.5s Time] [2023-12-02 15:49:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2023-12-02 15:49:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4420. [2023-12-02 15:49:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 2893 states have (on average 1.3601797442101624) internal successors, (3935), 2959 states have internal predecessors, (3935), 1246 states have call successors, (1246), 281 states have call predecessors, (1246), 280 states have return successors, (1261), 1215 states have call predecessors, (1261), 1245 states have call successors, (1261) [2023-12-02 15:49:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6442 transitions. [2023-12-02 15:49:59,554 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6442 transitions. Word has length 210 [2023-12-02 15:49:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:59,555 INFO L495 AbstractCegarLoop]: Abstraction has 4420 states and 6442 transitions. [2023-12-02 15:49:59,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-12-02 15:49:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6442 transitions. [2023-12-02 15:49:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-12-02 15:49:59,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:59,571 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:59,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:49:59,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 15:49:59,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:59,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash -512983198, now seen corresponding path program 1 times [2023-12-02 15:49:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622825880] [2023-12-02 15:49:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:50:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:00,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:50:00,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622825880] [2023-12-02 15:50:00,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 15:50:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949801375] [2023-12-02 15:50:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:00,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:00,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:00,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:50:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:01,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 5665 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:50:01,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 15:50:02,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:02,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949801375] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:02,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:02,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:50:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334488022] [2023-12-02 15:50:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:02,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:50:02,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:50:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:50:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:02,505 INFO L87 Difference]: Start difference. First operand 4420 states and 6442 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-12-02 15:50:06,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:08,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:12,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:15,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:17,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:19,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:22,386 INFO L93 Difference]: Finished difference Result 13074 states and 19038 transitions. [2023-12-02 15:50:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:22,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 212 [2023-12-02 15:50:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:22,432 INFO L225 Difference]: With dead ends: 13074 [2023-12-02 15:50:22,432 INFO L226 Difference]: Without dead ends: 8657 [2023-12-02 15:50:22,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:22,450 INFO L413 NwaCegarLoop]: 1456 mSDtfsCounter, 1523 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 7 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:22,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2898 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 374 Invalid, 6 Unknown, 0 Unchecked, 19.5s Time] [2023-12-02 15:50:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2023-12-02 15:50:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 8650. [2023-12-02 15:50:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8650 states, 5675 states have (on average 1.3594713656387665) internal successors, (7715), 5805 states have internal predecessors, (7715), 2414 states have call successors, (2414), 561 states have call predecessors, (2414), 560 states have return successors, (2441), 2351 states have call predecessors, (2441), 2413 states have call successors, (2441) [2023-12-02 15:50:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8650 states to 8650 states and 12570 transitions. [2023-12-02 15:50:22,913 INFO L78 Accepts]: Start accepts. Automaton has 8650 states and 12570 transitions. Word has length 212 [2023-12-02 15:50:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:22,913 INFO L495 AbstractCegarLoop]: Abstraction has 8650 states and 12570 transitions. [2023-12-02 15:50:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-12-02 15:50:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 8650 states and 12570 transitions. [2023-12-02 15:50:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-12-02 15:50:22,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:22,940 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:22,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:50:23,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 15:50:23,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:50:23,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1076220817, now seen corresponding path program 1 times [2023-12-02 15:50:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:50:23,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041966669] [2023-12-02 15:50:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:50:23,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:50:23,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515707427] [2023-12-02 15:50:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:23,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:23,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:50:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:25,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 5959 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:50:25,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2023-12-02 15:50:25,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:25,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:50:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041966669] [2023-12-02 15:50:25,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:50:25,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515707427] [2023-12-02 15:50:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515707427] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:25,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:25,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:50:25,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137608845] [2023-12-02 15:50:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:25,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:50:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:25,818 INFO L87 Difference]: Start difference. First operand 8650 states and 12570 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2023-12-02 15:50:32,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:34,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:36,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:39,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:41,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:43,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:47,782 INFO L93 Difference]: Finished difference Result 13048 states and 19013 transitions. [2023-12-02 15:50:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:50:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 278 [2023-12-02 15:50:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:47,808 INFO L225 Difference]: With dead ends: 13048 [2023-12-02 15:50:47,808 INFO L226 Difference]: Without dead ends: 8654 [2023-12-02 15:50:47,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:47,824 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 20 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:47,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 4321 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 541 Invalid, 6 Unknown, 0 Unchecked, 21.5s Time] [2023-12-02 15:50:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2023-12-02 15:50:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 8654. [2023-12-02 15:50:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8654 states, 5679 states have (on average 1.3592181722134178) internal successors, (7719), 5809 states have internal predecessors, (7719), 2414 states have call successors, (2414), 561 states have call predecessors, (2414), 560 states have return successors, (2441), 2351 states have call predecessors, (2441), 2413 states have call successors, (2441) [2023-12-02 15:50:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8654 states to 8654 states and 12574 transitions. [2023-12-02 15:50:48,269 INFO L78 Accepts]: Start accepts. Automaton has 8654 states and 12574 transitions. Word has length 278 [2023-12-02 15:50:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:48,270 INFO L495 AbstractCegarLoop]: Abstraction has 8654 states and 12574 transitions. [2023-12-02 15:50:48,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2023-12-02 15:50:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8654 states and 12574 transitions. [2023-12-02 15:50:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-12-02 15:50:48,293 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:48,293 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:48,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:50:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:48,494 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:50:48,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2126406687, now seen corresponding path program 1 times [2023-12-02 15:50:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:50:48,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947903218] [2023-12-02 15:50:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:50:48,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:50:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013136628] [2023-12-02 15:50:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:48,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:48,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:48,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7154459-8584-43d6-99d9-6a49aba01a18/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:50:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:50,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 5987 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:50:50,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2023-12-02 15:50:51,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-12-02 15:50:51,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:50:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947903218] [2023-12-02 15:50:51,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:50:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013136628] [2023-12-02 15:50:51,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013136628] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271797136] [2023-12-02 15:50:51,650 INFO L159 IcfgInterpreter]: Started Sifa with 173 locations of interest [2023-12-02 15:50:51,650 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:50:51,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:50:51,658 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:50:51,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:55:38,745 WARN L293 SmtUtils]: Spent 16.12s on a formula simplification that was a NOOP. DAG size: 5759 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 15:55:55,441 WARN L293 SmtUtils]: Spent 16.65s on a formula simplification that was a NOOP. DAG size: 5759 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 15:56:19,155 WARN L293 SmtUtils]: Spent 23.62s on a formula simplification. DAG size of input: 5760 DAG size of output: 5760 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 15:56:35,135 WARN L293 SmtUtils]: Spent 15.96s on a formula simplification that was a NOOP. DAG size: 5759 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 15:56:53,302 WARN L293 SmtUtils]: Spent 18.13s on a formula simplification that was a NOOP. DAG size: 5759 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 15:57:17,583 WARN L293 SmtUtils]: Spent 24.24s on a formula simplification. DAG size of input: 5760 DAG size of output: 5760 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)