./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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/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_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91 --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 [2023-11-24 23:59:03,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:59:03,073 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:59:03,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:59:03,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:59:03,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:59:03,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:59:03,143 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:59:03,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:59:03,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:59:03,149 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:59:03,151 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:59:03,151 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:59:03,153 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:59:03,154 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:59:03,154 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:59:03,154 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:59:03,155 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:59:03,155 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:59:03,156 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:59:03,156 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:59:03,157 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:59:03,158 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:59:03,159 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:59:03,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:59:03,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:59:03,160 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:59:03,161 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:59:03,161 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:59:03,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:59:03,163 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:59:03,163 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:59:03,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:59:03,164 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:59:03,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:03,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:59:03,165 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:59:03,166 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:59:03,166 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:59:03,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:59:03,166 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:59:03,167 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:59:03,167 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:59:03,167 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:59:03,168 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_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2023-11-24 23:59:03,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:59:03,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:59:03,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:59:03,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:59:03,511 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:59:03,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/../../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 [2023-11-24 23:59:06,661 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:59:07,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:59:07,232 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/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 [2023-11-24 23:59:07,279 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/data/971851b02/b97be216030842c2a7fe00dce3969761/FLAG5ebe660c9 [2023-11-24 23:59:07,293 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/data/971851b02/b97be216030842c2a7fe00dce3969761 [2023-11-24 23:59:07,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:59:07,304 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:59:07,306 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:07,306 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:59:07,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:59:07,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:07" (1/1) ... [2023-11-24 23:59:07,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63bde106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:07, skipping insertion in model container [2023-11-24 23:59:07,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:59:07" (1/1) ... [2023-11-24 23:59:07,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:59:08,663 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_109079ec-1102-414b-ba93-9e847991fa52/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] [2023-11-24 23:59:08,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:08,945 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:59:09,060 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [2600] [2023-11-24 23:59:09,067 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [2608] [2023-11-24 23:59:09,229 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_109079ec-1102-414b-ba93-9e847991fa52/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] [2023-11-24 23:59:09,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:59:09,377 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:59:09,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09 WrapperNode [2023-11-24 23:59:09,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:59:09,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:09,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:59:09,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:59:09,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:09,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:09,724 INFO L138 Inliner]: procedures = 106, calls = 3479, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 4436 [2023-11-24 23:59:09,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:59:09,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:59:09,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:59:09,726 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:59:09,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:09,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:09,824 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:09,824 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:10,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:10,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:10,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:10,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:10,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:59:10,143 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:59:10,143 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:59:10,144 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:59:10,145 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (1/1) ... [2023-11-24 23:59:10,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:59:10,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:10,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:59:10,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_109079ec-1102-414b-ba93-9e847991fa52/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:59:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2023-11-24 23:59:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2023-11-24 23:59:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2023-11-24 23:59:10,231 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2023-11-24 23:59:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-24 23:59:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-24 23:59:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-24 23:59:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2023-11-24 23:59:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2023-11-24 23:59:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-24 23:59:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-24 23:59:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2023-11-24 23:59:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2023-11-24 23:59:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-24 23:59:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-24 23:59:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:59:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-24 23:59:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-24 23:59:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2023-11-24 23:59:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2023-11-24 23:59:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-24 23:59:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-24 23:59:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-24 23:59:10,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-24 23:59:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2023-11-24 23:59:10,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2023-11-24 23:59:10,238 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-11-24 23:59:10,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-11-24 23:59:10,239 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2023-11-24 23:59:10,239 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2023-11-24 23:59:10,239 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-24 23:59:10,239 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-24 23:59:10,239 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2023-11-24 23:59:10,239 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2023-11-24 23:59:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2023-11-24 23:59:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2023-11-24 23:59:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:59:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2023-11-24 23:59:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2023-11-24 23:59:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2023-11-24 23:59:10,241 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2023-11-24 23:59:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-24 23:59:10,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-24 23:59:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-24 23:59:10,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-24 23:59:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:59:10,242 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:59:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:59:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2023-11-24 23:59:10,242 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2023-11-24 23:59:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-24 23:59:10,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-24 23:59:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:59:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2023-11-24 23:59:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2023-11-24 23:59:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2023-11-24 23:59:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2023-11-24 23:59:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-24 23:59:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-24 23:59:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:59:10,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:59:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:59:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2023-11-24 23:59:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2023-11-24 23:59:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2023-11-24 23:59:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2023-11-24 23:59:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2023-11-24 23:59:10,247 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2023-11-24 23:59:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2023-11-24 23:59:10,247 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2023-11-24 23:59:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:59:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:59:10,248 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-24 23:59:10,248 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-24 23:59:10,248 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-24 23:59:10,249 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-24 23:59:10,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2023-11-24 23:59:10,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2023-11-24 23:59:10,249 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2023-11-24 23:59:10,250 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2023-11-24 23:59:10,250 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-24 23:59:10,250 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-24 23:59:10,250 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-24 23:59:10,250 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-24 23:59:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2023-11-24 23:59:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2023-11-24 23:59:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:59:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2023-11-24 23:59:10,252 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2023-11-24 23:59:10,252 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-11-24 23:59:10,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-11-24 23:59:10,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-24 23:59:10,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:59:10,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:59:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2023-11-24 23:59:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2023-11-24 23:59:10,744 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:59:10,748 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:59:11,661 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-24 23:59:17,755 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:59:19,193 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:59:19,194 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:59:19,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:19 BoogieIcfgContainer [2023-11-24 23:59:19,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:59:19,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:59:19,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:59:19,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:59:19,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:59:07" (1/3) ... [2023-11-24 23:59:19,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdf1d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:19, skipping insertion in model container [2023-11-24 23:59:19,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:59:09" (2/3) ... [2023-11-24 23:59:19,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdf1d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:59:19, skipping insertion in model container [2023-11-24 23:59:19,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:59:19" (3/3) ... [2023-11-24 23:59:19,208 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-24 23:59:19,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:59:19,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:59:19,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:59:19,330 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;@1e4d2a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:59:19,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:59:19,344 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) [2023-11-24 23:59:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-24 23:59:19,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:19,398 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] [2023-11-24 23:59:19,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:19,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2146876234, now seen corresponding path program 1 times [2023-11-24 23:59:19,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:19,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016281221] [2023-11-24 23:59:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2023-11-24 23:59:22,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016281221] [2023-11-24 23:59:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016281221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:22,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:22,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235716514] [2023-11-24 23:59:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:59:22,176 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) [2023-11-24 23:59:24,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:25,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:27,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:29,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:31,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:33,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:34,341 INFO L93 Difference]: Finished difference Result 1445 states and 2165 transitions. [2023-11-24 23:59:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:34,345 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 [2023-11-24 23:59:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:34,372 INFO L225 Difference]: With dead ends: 1445 [2023-11-24 23:59:34,372 INFO L226 Difference]: Without dead ends: 820 [2023-11-24 23:59:34,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:59:34,388 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 367 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s 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, 11.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:34,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1658 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 278 Invalid, 4 Unknown, 0 Unchecked, 11.9s Time] [2023-11-24 23:59:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-11-24 23:59:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 810. [2023-11-24 23:59:34,536 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) [2023-11-24 23:59:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1195 transitions. [2023-11-24 23:59:34,553 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1195 transitions. Word has length 266 [2023-11-24 23:59:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:34,559 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1195 transitions. [2023-11-24 23:59:34,559 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) [2023-11-24 23:59:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1195 transitions. [2023-11-24 23:59:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-11-24 23:59:34,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:34,572 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] [2023-11-24 23:59:34,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:59:34,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:34,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2106667848, now seen corresponding path program 1 times [2023-11-24 23:59:34,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:34,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887203704] [2023-11-24 23:59:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2287 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2285 trivial. 0 not checked. [2023-11-24 23:59:36,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:36,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887203704] [2023-11-24 23:59:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887203704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:36,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:36,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:59:36,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109237674] [2023-11-24 23:59:36,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:36,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:36,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:59:36,883 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) [2023-11-24 23:59:38,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:40,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:40,930 INFO L93 Difference]: Finished difference Result 1522 states and 2249 transitions. [2023-11-24 23:59:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:40,931 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 [2023-11-24 23:59:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:40,940 INFO L225 Difference]: With dead ends: 1522 [2023-11-24 23:59:40,940 INFO L226 Difference]: Without dead ends: 810 [2023-11-24 23:59:40,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:59:40,946 INFO L413 NwaCegarLoop]: 902 mSDtfsCounter, 902 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:40,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 902 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-11-24 23:59:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-11-24 23:59:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2023-11-24 23:59:41,016 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) [2023-11-24 23:59:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1193 transitions. [2023-11-24 23:59:41,027 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1193 transitions. Word has length 282 [2023-11-24 23:59:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:41,031 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1193 transitions. [2023-11-24 23:59:41,031 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) [2023-11-24 23:59:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1193 transitions. [2023-11-24 23:59:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-11-24 23:59:41,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:41,040 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] [2023-11-24 23:59:41,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:59:41,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:41,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -645193048, now seen corresponding path program 1 times [2023-11-24 23:59:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:41,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226925073] [2023-11-24 23:59:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2289 trivial. 0 not checked. [2023-11-24 23:59:42,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226925073] [2023-11-24 23:59:42,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226925073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:42,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:42,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340091390] [2023-11-24 23:59:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:42,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:42,921 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) [2023-11-24 23:59:45,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:47,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:49,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:50,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:52,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:54,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:59:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:55,641 INFO L93 Difference]: Finished difference Result 1524 states and 2247 transitions. [2023-11-24 23:59:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:55,643 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 [2023-11-24 23:59:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:55,651 INFO L225 Difference]: With dead ends: 1524 [2023-11-24 23:59:55,651 INFO L226 Difference]: Without dead ends: 810 [2023-11-24 23:59:55,655 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 [2023-11-24 23:59:55,656 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 1 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:55,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2708 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 280 Invalid, 5 Unknown, 0 Unchecked, 12.6s Time] [2023-11-24 23:59:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-11-24 23:59:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2023-11-24 23:59:55,713 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) [2023-11-24 23:59:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1191 transitions. [2023-11-24 23:59:55,722 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1191 transitions. Word has length 288 [2023-11-24 23:59:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:55,723 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1191 transitions. [2023-11-24 23:59:55,724 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) [2023-11-24 23:59:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1191 transitions. [2023-11-24 23:59:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-24 23:59:55,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:55,731 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] [2023-11-24 23:59:55,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:59:55,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:55,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1068611921, now seen corresponding path program 1 times [2023-11-24 23:59:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:55,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160403951] [2023-11-24 23:59:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2023-11-24 23:59:57,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160403951] [2023-11-24 23:59:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160403951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:57,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:57,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532760871] [2023-11-24 23:59:57,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:57,528 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)