./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.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_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/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_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/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_059a0cfa-1cd6-4262-9012-4333aab58de1/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 d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:10:56,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:10:56,423 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:10:56,428 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:10:56,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:10:56,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:10:56,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:10:56,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:10:56,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:10:56,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:10:56,455 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:10:56,455 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:10:56,456 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:10:56,456 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:10:56,457 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:10:56,457 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:10:56,458 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:10:56,458 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:10:56,458 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:10:56,459 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:10:56,459 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:10:56,460 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:10:56,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:10:56,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:10:56,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:10:56,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:10:56,462 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:10:56,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:10:56,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:10:56,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:10:56,463 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:10:56,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:10:56,464 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:10:56,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:10:56,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:10:56,465 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:10:56,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:10:56,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:10:56,465 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:10:56,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:10:56,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:10:56,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:10:56,466 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:10:56,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:10:56,466 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_059a0cfa-1cd6-4262-9012-4333aab58de1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2023-12-02 17:10:56,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:10:56,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:10:56,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:10:56,702 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:10:56,702 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:10:56,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-12-02 17:10:59,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:10:59,816 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:10:59,816 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-12-02 17:10:59,841 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/data/796dbaf6b/3e9b92180a184144b9101b3882552cd0/FLAGf2a7bf8c4 [2023-12-02 17:10:59,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/data/796dbaf6b/3e9b92180a184144b9101b3882552cd0 [2023-12-02 17:10:59,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:10:59,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:10:59,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:10:59,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:10:59,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:10:59,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:10:59" (1/1) ... [2023-12-02 17:10:59,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e07abc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:10:59, skipping insertion in model container [2023-12-02 17:10:59,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:10:59" (1/1) ... [2023-12-02 17:10:59,971 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:11:00,849 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_059a0cfa-1cd6-4262-9012-4333aab58de1/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2023-12-02 17:11:00,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:11:00,960 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:11:01,032 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [2600] [2023-12-02 17:11:01,034 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [2608] [2023-12-02 17:11:01,175 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_059a0cfa-1cd6-4262-9012-4333aab58de1/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2023-12-02 17:11:01,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:11:01,262 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:11:01,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01 WrapperNode [2023-12-02 17:11:01,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:11:01,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:11:01,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:11:01,264 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:11:01,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,324 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,459 INFO L138 Inliner]: procedures = 106, calls = 3479, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 4436 [2023-12-02 17:11:01,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:11:01,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:11:01,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:11:01,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:11:01,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,498 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,661 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:11:01,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:11:01,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:11:01,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:11:01,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (1/1) ... [2023-12-02 17:11:01,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:11:01,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:11:01,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:11:01,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:11:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2023-12-02 17:11:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2023-12-02 17:11:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2023-12-02 17:11:01,775 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2023-12-02 17:11:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 17:11:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-12-02 17:11:01,776 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-12-02 17:11:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2023-12-02 17:11:01,776 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2023-12-02 17:11:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 17:11:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 17:11:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2023-12-02 17:11:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2023-12-02 17:11:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 17:11:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 17:11:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:11:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 17:11:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 17:11:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2023-12-02 17:11:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2023-12-02 17:11:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 17:11:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 17:11:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 17:11:01,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 17:11:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2023-12-02 17:11:01,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2023-12-02 17:11:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-12-02 17:11:01,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-12-02 17:11:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2023-12-02 17:11:01,780 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2023-12-02 17:11:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 17:11:01,780 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 17:11:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2023-12-02 17:11:01,780 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2023-12-02 17:11:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2023-12-02 17:11:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2023-12-02 17:11:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:11:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2023-12-02 17:11:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2023-12-02 17:11:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2023-12-02 17:11:01,781 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2023-12-02 17:11:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 17:11:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 17:11:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 17:11:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 17:11:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:11:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:11:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:11:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2023-12-02 17:11:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2023-12-02 17:11:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 17:11:01,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 17:11:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:11:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2023-12-02 17:11:01,783 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2023-12-02 17:11:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2023-12-02 17:11:01,783 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2023-12-02 17:11:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-12-02 17:11:01,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-12-02 17:11:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:11:01,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:11:01,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:11:01,784 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2023-12-02 17:11:01,784 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2023-12-02 17:11:01,784 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2023-12-02 17:11:01,784 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2023-12-02 17:11:01,784 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2023-12-02 17:11:01,785 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2023-12-02 17:11:01,785 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2023-12-02 17:11:01,785 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2023-12-02 17:11:01,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:11:01,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:11:01,785 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-12-02 17:11:01,785 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-12-02 17:11:01,785 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 17:11:01,785 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 17:11:01,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2023-12-02 17:11:01,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2023-12-02 17:11:01,786 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2023-12-02 17:11:01,786 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2023-12-02 17:11:01,786 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 17:11:01,786 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 17:11:01,786 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 17:11:01,786 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 17:11:01,786 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2023-12-02 17:11:01,787 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2023-12-02 17:11:01,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:11:01,787 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2023-12-02 17:11:01,787 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2023-12-02 17:11:01,787 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-12-02 17:11:01,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-12-02 17:11:01,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 17:11:01,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:11:01,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:11:01,788 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2023-12-02 17:11:01,788 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2023-12-02 17:11:02,119 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:11:02,122 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:11:02,800 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 17:11:07,602 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:11:08,563 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:11:08,563 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:11:08,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:11:08 BoogieIcfgContainer [2023-12-02 17:11:08,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:11:08,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:11:08,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:11:08,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:11:08,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:10:59" (1/3) ... [2023-12-02 17:11:08,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b498d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:11:08, skipping insertion in model container [2023-12-02 17:11:08,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:11:01" (2/3) ... [2023-12-02 17:11:08,574 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b498d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:11:08, skipping insertion in model container [2023-12-02 17:11:08,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:11:08" (3/3) ... [2023-12-02 17:11:08,576 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-12-02 17:11:08,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:11:08,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:11:08,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:11:08,674 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;@73931237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:11:08,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:11:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 692 states, 433 states have (on average 1.374133949191686) internal successors, (595), 449 states have internal predecessors, (595), 218 states have call successors, (218), 40 states have call predecessors, (218), 39 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2023-12-02 17:11:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 17:11:08,708 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:08,709 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:11:08,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:11:08,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2146876234, now seen corresponding path program 1 times [2023-12-02 17:11:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:08,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716808134] [2023-12-02 17:11:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2023-12-02 17:11:10,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716808134] [2023-12-02 17:11:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716808134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:11:10,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:11:10,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:11:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20503367] [2023-12-02 17:11:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:11:10,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:11:10,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:11:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:11:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:11:10,631 INFO L87 Difference]: Start difference. First operand has 692 states, 433 states have (on average 1.374133949191686) internal successors, (595), 449 states have internal predecessors, (595), 218 states have call successors, (218), 40 states have call predecessors, (218), 39 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-12-02 17:11:12,755 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 17:11:14,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:15,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:18,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:20,174 WARN L539 Checker$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 17:11:22,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:11:22,490 INFO L93 Difference]: Finished difference Result 1445 states and 2165 transitions. [2023-12-02 17:11:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:11:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 266 [2023-12-02 17:11:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:11:22,510 INFO L225 Difference]: With dead ends: 1445 [2023-12-02 17:11:22,510 INFO L226 Difference]: Without dead ends: 820 [2023-12-02 17:11:22,518 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 17:11:22,521 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 367 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:11:22,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1658 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 278 Invalid, 4 Unknown, 0 Unchecked, 11.7s Time] [2023-12-02 17:11:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-12-02 17:11:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 810. [2023-12-02 17:11:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 523 states have internal predecessors, (681), 257 states have call successors, (257), 50 states have call predecessors, (257), 50 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2023-12-02 17:11:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1195 transitions. [2023-12-02 17:11:22,648 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1195 transitions. Word has length 266 [2023-12-02 17:11:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:11:22,650 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1195 transitions. [2023-12-02 17:11:22,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-12-02 17:11:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1195 transitions. [2023-12-02 17:11:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-12-02 17:11:22,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:22,658 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 17:11:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:11:22,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:11:22,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2106667848, now seen corresponding path program 1 times [2023-12-02 17:11:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:22,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341500355] [2023-12-02 17:11:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:22,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2287 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2285 trivial. 0 not checked. [2023-12-02 17:11:24,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:24,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341500355] [2023-12-02 17:11:24,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341500355] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:11:24,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:11:24,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:11:24,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908528764] [2023-12-02 17:11:24,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:11:24,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:11:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:11:24,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:11:24,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:11:24,395 INFO L87 Difference]: Start difference. First operand 810 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2023-12-02 17:11:26,526 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 17:11:28,588 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 17:11:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:11:28,908 INFO L93 Difference]: Finished difference Result 1522 states and 2249 transitions. [2023-12-02 17:11:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:11:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 282 [2023-12-02 17:11:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:11:28,918 INFO L225 Difference]: With dead ends: 1522 [2023-12-02 17:11:28,918 INFO L226 Difference]: Without dead ends: 810 [2023-12-02 17:11:28,922 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 17:11:28,924 INFO L413 NwaCegarLoop]: 902 mSDtfsCounter, 902 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:11:28,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 902 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 17:11:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-12-02 17:11:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2023-12-02 17:11:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 502 states have (on average 1.3525896414342629) internal successors, (679), 523 states have internal predecessors, (679), 257 states have call successors, (257), 50 states have call predecessors, (257), 50 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2023-12-02 17:11:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1193 transitions. [2023-12-02 17:11:28,985 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1193 transitions. Word has length 282 [2023-12-02 17:11:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:11:28,986 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1193 transitions. [2023-12-02 17:11:28,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2023-12-02 17:11:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1193 transitions. [2023-12-02 17:11:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-12-02 17:11:28,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:28,993 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2023-12-02 17:11:28,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:11:28,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:11:28,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash -645193048, now seen corresponding path program 1 times [2023-12-02 17:11:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:28,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107909959] [2023-12-02 17:11:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2289 trivial. 0 not checked. [2023-12-02 17:11:30,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107909959] [2023-12-02 17:11:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107909959] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:11:30,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:11:30,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:11:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662495004] [2023-12-02 17:11:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:11:30,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:11:30,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:11:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:11:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:11:30,264 INFO L87 Difference]: Start difference. First operand 810 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2023-12-02 17:11:32,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:34,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:36,379 WARN L539 Checker$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 17:11:38,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:40,464 WARN L539 Checker$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 17:11:42,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:11:43,156 INFO L93 Difference]: Finished difference Result 1524 states and 2247 transitions. [2023-12-02 17:11:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:11:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 288 [2023-12-02 17:11:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:11:43,164 INFO L225 Difference]: With dead ends: 1524 [2023-12-02 17:11:43,165 INFO L226 Difference]: Without dead ends: 810 [2023-12-02 17:11:43,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:11:43,170 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 1 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:11:43,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2708 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 279 Invalid, 6 Unknown, 0 Unchecked, 12.8s Time] [2023-12-02 17:11:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-12-02 17:11:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2023-12-02 17:11:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 502 states have (on average 1.348605577689243) internal successors, (677), 523 states have internal predecessors, (677), 257 states have call successors, (257), 50 states have call predecessors, (257), 50 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2023-12-02 17:11:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1191 transitions. [2023-12-02 17:11:43,235 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1191 transitions. Word has length 288 [2023-12-02 17:11:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:11:43,236 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1191 transitions. [2023-12-02 17:11:43,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2023-12-02 17:11:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1191 transitions. [2023-12-02 17:11:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-12-02 17:11:43,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:43,242 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2023-12-02 17:11:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:11:43,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:11:43,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1068611921, now seen corresponding path program 1 times [2023-12-02 17:11:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:43,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668320138] [2023-12-02 17:11:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2023-12-02 17:11:44,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668320138] [2023-12-02 17:11:44,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668320138] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:11:44,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:11:44,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:11:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971395799] [2023-12-02 17:11:44,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:11:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:11:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:11:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:11:44,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:11:44,672 INFO L87 Difference]: Start difference. First operand 810 states and 1191 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-12-02 17:11:46,794 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 17:11:48,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:50,812 WARN L539 Checker$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 17:11:52,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:11:54,913 WARN L539 Checker$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 17:11:56,923 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 17:11:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:11:57,506 INFO L93 Difference]: Finished difference Result 1526 states and 2245 transitions. [2023-12-02 17:11:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:11:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 294 [2023-12-02 17:11:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:11:57,514 INFO L225 Difference]: With dead ends: 1526 [2023-12-02 17:11:57,514 INFO L226 Difference]: Without dead ends: 784 [2023-12-02 17:11:57,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:11:57,520 INFO L413 NwaCegarLoop]: 902 mSDtfsCounter, 1 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:11:57,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2699 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 6 Unknown, 0 Unchecked, 12.8s Time] [2023-12-02 17:11:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-12-02 17:11:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2023-12-02 17:11:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 490 states have (on average 1.3408163265306123) internal successors, (657), 509 states have internal predecessors, (657), 245 states have call successors, (245), 48 states have call predecessors, (245), 48 states have return successors, (245), 237 states have call predecessors, (245), 245 states have call successors, (245) [2023-12-02 17:11:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1147 transitions. [2023-12-02 17:11:57,580 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1147 transitions. Word has length 294 [2023-12-02 17:11:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:11:57,581 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1147 transitions. [2023-12-02 17:11:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-12-02 17:11:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1147 transitions. [2023-12-02 17:11:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-12-02 17:11:57,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:11:57,590 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:11:57,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:11:57,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:11:57,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:11:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1216501105, now seen corresponding path program 1 times [2023-12-02 17:11:57,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:11:57,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852616666] [2023-12-02 17:11:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:57,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:11:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:11:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2023-12-02 17:11:59,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:11:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852616666] [2023-12-02 17:11:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852616666] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:11:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990377466] [2023-12-02 17:11:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:11:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:11:59,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:11:59,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:11:59,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:12:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:01,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 8483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:12:01,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 2382 trivial. 0 not checked. [2023-12-02 17:12:01,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:12:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990377466] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:12:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-12-02 17:12:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922068193] [2023-12-02 17:12:01,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:01,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:12:01,142 INFO L87 Difference]: Start difference. First operand 784 states and 1147 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2023-12-02 17:12:03,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:12:04,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:12:06,556 WARN L539 Checker$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 17:12:08,566 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 17:12:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:08,960 INFO L93 Difference]: Finished difference Result 1482 states and 2265 transitions. [2023-12-02 17:12:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 389 [2023-12-02 17:12:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:08,967 INFO L225 Difference]: With dead ends: 1482 [2023-12-02 17:12:08,967 INFO L226 Difference]: Without dead ends: 796 [2023-12-02 17:12:08,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:12:08,972 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 2 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:08,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1751 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 17:12:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2023-12-02 17:12:09,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 788. [2023-12-02 17:12:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 494 states have (on average 1.3380566801619433) internal successors, (661), 513 states have internal predecessors, (661), 245 states have call successors, (245), 48 states have call predecessors, (245), 48 states have return successors, (245), 237 states have call predecessors, (245), 245 states have call successors, (245) [2023-12-02 17:12:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1151 transitions. [2023-12-02 17:12:09,042 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1151 transitions. Word has length 389 [2023-12-02 17:12:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:09,043 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1151 transitions. [2023-12-02 17:12:09,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2023-12-02 17:12:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1151 transitions. [2023-12-02 17:12:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2023-12-02 17:12:09,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:09,054 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:12:09,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:12:09,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:09,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:09,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2017184030, now seen corresponding path program 1 times [2023-12-02 17:12:09,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:09,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432492676] [2023-12-02 17:12:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2473 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2471 trivial. 0 not checked. [2023-12-02 17:12:10,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:10,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432492676] [2023-12-02 17:12:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432492676] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:12:10,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:12:10,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:12:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682771885] [2023-12-02 17:12:10,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:12:10,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:12:10,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:12:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:12:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:12:10,570 INFO L87 Difference]: Start difference. First operand 788 states and 1151 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2023-12-02 17:12:12,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:12:14,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:12:16,802 WARN L539 Checker$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 17:12:18,809 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 17:12:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:12:19,223 INFO L93 Difference]: Finished difference Result 1484 states and 2171 transitions. [2023-12-02 17:12:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:12:19,224 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), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 404 [2023-12-02 17:12:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:12:19,230 INFO L225 Difference]: With dead ends: 1484 [2023-12-02 17:12:19,230 INFO L226 Difference]: Without dead ends: 794 [2023-12-02 17:12:19,234 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 17:12:19,235 INFO L413 NwaCegarLoop]: 880 mSDtfsCounter, 1 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:12:19,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1756 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2023-12-02 17:12:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-12-02 17:12:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 790. [2023-12-02 17:12:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 496 states have (on average 1.3366935483870968) internal successors, (663), 515 states have internal predecessors, (663), 245 states have call successors, (245), 48 states have call predecessors, (245), 48 states have return successors, (245), 237 states have call predecessors, (245), 245 states have call successors, (245) [2023-12-02 17:12:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1153 transitions. [2023-12-02 17:12:19,274 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1153 transitions. Word has length 404 [2023-12-02 17:12:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:12:19,275 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1153 transitions. [2023-12-02 17:12:19,275 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), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2023-12-02 17:12:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1153 transitions. [2023-12-02 17:12:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2023-12-02 17:12:19,278 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:12:19,279 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:12:19,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:12:19,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:12:19,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:12:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash 313083658, now seen corresponding path program 1 times [2023-12-02 17:12:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:12:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543413605] [2023-12-02 17:12:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:12:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2586 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2023-12-02 17:12:20,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:12:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543413605] [2023-12-02 17:12:20,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543413605] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:12:20,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461553422] [2023-12-02 17:12:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:12:20,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:12:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:12:20,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:12:20,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_059a0cfa-1cd6-4262-9012-4333aab58de1/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:12:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:12:22,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 8567 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:12:22,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:12:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2586 backedges. 168 proven. 1 refuted. 0 times theorem prover too weak. 2417 trivial. 0 not checked. [2023-12-02 17:12:22,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:12:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2586 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2023-12-02 17:12:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461553422] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:12:23,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777200603] [2023-12-02 17:12:23,052 INFO L159 IcfgInterpreter]: Started Sifa with 192 locations of interest [2023-12-02 17:12:23,052 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:12:23,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:12:23,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:12:23,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:15:09,021 WARN L293 SmtUtils]: Spent 18.88s on a formula simplification that was a NOOP. DAG size: 7448 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:17:32,234 WARN L293 SmtUtils]: Spent 18.69s on a formula simplification that was a NOOP. DAG size: 7448 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:19:51,699 WARN L293 SmtUtils]: Spent 18.43s on a formula simplification that was a NOOP. DAG size: 7448 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:22:12,537 WARN L293 SmtUtils]: Spent 19.58s on a formula simplification that was a NOOP. DAG size: 7448 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:24:27,839 WARN L293 SmtUtils]: Spent 44.60s on a formula simplification that was a NOOP. DAG size: 13182 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:25:09,228 WARN L293 SmtUtils]: Spent 41.37s on a formula simplification that was a NOOP. DAG size: 13182 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)