./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --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 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:22:12,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:22:12,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:22:12,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:22:12,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:22:12,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:22:12,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:22:12,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:22:12,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:22:12,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:22:12,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:22:12,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:22:12,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:22:12,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:22:12,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:22:12,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:22:12,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:22:12,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:22:12,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:22:12,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:22:12,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:22:12,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:22:12,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:22:12,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:22:12,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:22:12,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:22:12,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:22:12,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:22:12,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:22:12,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:22:12,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:22:12,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:22:12,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:22:12,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:22:12,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:22:12,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:22:12,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:22:12,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:22:12,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:22:12,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:22:12,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:22:12,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:22:12,601 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:22:12,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:22:12,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:22:12,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:22:12,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:22:12,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:22:12,603 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:22:12,603 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:22:12,604 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:22:12,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:22:12,604 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:22:12,604 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:22:12,605 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:22:12,605 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:22:12,605 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:22:12,605 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:22:12,606 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:22:12,606 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:22:12,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:22:12,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:22:12,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:22:12,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:22:12,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:22:12,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:22:12,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:22:12,609 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:22:12,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:22:12,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:22:12,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:22:12,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:12,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:22:12,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:22:12,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:22:12,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:22:12,611 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:22:12,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:22:12,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:22:12,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:22:12,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 [2022-10-17 17:22:13,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:22:13,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:22:13,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:22:13,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:22:13,046 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:22:13,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2022-10-17 17:22:13,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/data/9efa43179/8be3440f2690454db387fe00b56fc188/FLAGd31986633 [2022-10-17 17:22:13,929 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:22:13,930 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2022-10-17 17:22:13,971 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/data/9efa43179/8be3440f2690454db387fe00b56fc188/FLAGd31986633 [2022-10-17 17:22:14,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/data/9efa43179/8be3440f2690454db387fe00b56fc188 [2022-10-17 17:22:14,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:22:14,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:22:14,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:14,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:22:14,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:22:14,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1908e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:14, skipping insertion in model container [2022-10-17 17:22:14,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:14" (1/1) ... [2022-10-17 17:22:14,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:22:14,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:22:15,494 WARN L230 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_59123c17-e262-4bff-9fe7-fcb5231d107f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2022-10-17 17:22:15,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:15,615 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:22:15,884 WARN L230 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_59123c17-e262-4bff-9fe7-fcb5231d107f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2022-10-17 17:22:15,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:15,984 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:22:15,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15 WrapperNode [2022-10-17 17:22:15,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:15,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:15,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:22:15,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:22:15,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,175 INFO L138 Inliner]: procedures = 138, calls = 843, calls flagged for inlining = 61, calls inlined = 52, statements flattened = 1733 [2022-10-17 17:22:16,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:16,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:22:16,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:22:16,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:22:16,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:22:16,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:22:16,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:22:16,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:22:16,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (1/1) ... [2022-10-17 17:22:16,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:16,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:22:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:22:16,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:22:16,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:22:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:22:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:22:16,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:22:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:22:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-10-17 17:22:16,462 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-10-17 17:22:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-10-17 17:22:16,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-10-17 17:22:16,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:22:16,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:22:16,463 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_dealloc_kioc [2022-10-17 17:22:16,463 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_dealloc_kioc [2022-10-17 17:22:16,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-10-17 17:22:16,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-10-17 17:22:16,464 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_attach_buf [2022-10-17 17:22:16,464 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_attach_buf [2022-10-17 17:22:16,464 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-10-17 17:22:16,464 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-10-17 17:22:16,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:22:16,465 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-10-17 17:22:16,465 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-10-17 17:22:16,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:22:16,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:22:16,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:22:16,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:22:16,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:22:16,466 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:22:16,466 INFO L130 BoogieDeclarations]: Found specification of procedure mraid_mm_ioctl [2022-10-17 17:22:16,466 INFO L138 BoogieDeclarations]: Found implementation of procedure mraid_mm_ioctl [2022-10-17 17:22:16,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-10-17 17:22:16,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-10-17 17:22:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:22:16,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:22:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:22:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-10-17 17:22:16,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-10-17 17:22:16,468 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-10-17 17:22:16,468 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-10-17 17:22:16,468 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-10-17 17:22:16,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-10-17 17:22:16,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:22:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:22:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:22:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-10-17 17:22:16,469 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-10-17 17:22:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-10-17 17:22:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-10-17 17:22:16,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-10-17 17:22:16,470 INFO L130 BoogieDeclarations]: Found specification of procedure up [2022-10-17 17:22:16,470 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2022-10-17 17:22:16,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:22:16,470 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-10-17 17:22:16,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-10-17 17:22:16,471 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-10-17 17:22:16,471 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-10-17 17:22:16,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:22:16,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:22:16,471 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-10-17 17:22:16,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-10-17 17:22:16,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:22:16,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:22:16,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:22:16,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:22:16,472 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2022-10-17 17:22:16,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2022-10-17 17:22:16,993 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:22:16,998 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:17,307 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:22:19,515 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:22:19,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:22:19,859 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:22:19,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:19 BoogieIcfgContainer [2022-10-17 17:22:19,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:22:19,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:22:19,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:22:19,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:22:19,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:22:14" (1/3) ... [2022-10-17 17:22:19,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe58180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:19, skipping insertion in model container [2022-10-17 17:22:19,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:15" (2/3) ... [2022-10-17 17:22:19,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe58180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:19, skipping insertion in model container [2022-10-17 17:22:19,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:19" (3/3) ... [2022-10-17 17:22:19,873 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2022-10-17 17:22:19,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:22:19,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:22:19,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:19,990 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=LoopsAndPotentialCycles, 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;@6d7c15a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:19,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:22:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 191 states have (on average 1.450261780104712) internal successors, (277), 199 states have internal predecessors, (277), 67 states have call successors, (67), 25 states have call predecessors, (67), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-10-17 17:22:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-10-17 17:22:20,019 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:20,020 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:22:20,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash 881366556, now seen corresponding path program 1 times [2022-10-17 17:22:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:20,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074918300] [2022-10-17 17:22:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-10-17 17:22:20,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:20,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074918300] [2022-10-17 17:22:20,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074918300] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:20,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:20,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:22:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203057876] [2022-10-17 17:22:20,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:20,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:22:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:22:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:20,868 INFO L87 Difference]: Start difference. First operand has 284 states, 191 states have (on average 1.450261780104712) internal successors, (277), 199 states have internal predecessors, (277), 67 states have call successors, (67), 25 states have call predecessors, (67), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:22:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:21,676 INFO L93 Difference]: Finished difference Result 552 states and 802 transitions. [2022-10-17 17:22:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:22:21,711 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2022-10-17 17:22:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:21,736 INFO L225 Difference]: With dead ends: 552 [2022-10-17 17:22:21,736 INFO L226 Difference]: Without dead ends: 277 [2022-10-17 17:22:21,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:21,760 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:21,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 336 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:22:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-10-17 17:22:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-10-17 17:22:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 189 states have (on average 1.417989417989418) internal successors, (268), 192 states have internal predecessors, (268), 64 states have call successors, (64), 24 states have call predecessors, (64), 23 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-10-17 17:22:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 395 transitions. [2022-10-17 17:22:21,873 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 395 transitions. Word has length 132 [2022-10-17 17:22:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:21,875 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 395 transitions. [2022-10-17 17:22:21,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:22:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 395 transitions. [2022-10-17 17:22:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-10-17 17:22:21,886 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:21,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:22:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:22:21,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1740405804, now seen corresponding path program 1 times [2022-10-17 17:22:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125786467] [2022-10-17 17:22:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-10-17 17:22:22,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:22,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125786467] [2022-10-17 17:22:22,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125786467] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:22,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:22,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:22,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270593338] [2022-10-17 17:22:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:22,367 INFO L87 Difference]: Start difference. First operand 277 states and 395 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:22:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:23,555 INFO L93 Difference]: Finished difference Result 561 states and 801 transitions. [2022-10-17 17:22:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2022-10-17 17:22:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:23,561 INFO L225 Difference]: With dead ends: 561 [2022-10-17 17:22:23,561 INFO L226 Difference]: Without dead ends: 299 [2022-10-17 17:22:23,563 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 [2022-10-17 17:22:23,564 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 43 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:23,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 633 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:22:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-10-17 17:22:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-10-17 17:22:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 208 states have (on average 1.4230769230769231) internal successors, (296), 211 states have internal predecessors, (296), 65 states have call successors, (65), 26 states have call predecessors, (65), 25 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-10-17 17:22:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 425 transitions. [2022-10-17 17:22:23,618 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 425 transitions. Word has length 133 [2022-10-17 17:22:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:23,619 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 425 transitions. [2022-10-17 17:22:23,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:22:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 425 transitions. [2022-10-17 17:22:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-10-17 17:22:23,630 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:23,631 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:22:23,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2131710009, now seen corresponding path program 1 times [2022-10-17 17:22:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:23,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503394185] [2022-10-17 17:22:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-10-17 17:22:24,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503394185] [2022-10-17 17:22:24,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503394185] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:24,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:24,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108478108] [2022-10-17 17:22:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:24,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:24,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:24,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:24,178 INFO L87 Difference]: Start difference. First operand 299 states and 425 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-10-17 17:22:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:26,315 INFO L93 Difference]: Finished difference Result 612 states and 873 transitions. [2022-10-17 17:22:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 167 [2022-10-17 17:22:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:26,320 INFO L225 Difference]: With dead ends: 612 [2022-10-17 17:22:26,320 INFO L226 Difference]: Without dead ends: 331 [2022-10-17 17:22:26,322 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 [2022-10-17 17:22:26,324 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 47 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:26,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 654 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:22:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-10-17 17:22:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-10-17 17:22:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 236 states have (on average 1.4279661016949152) internal successors, (337), 239 states have internal predecessors, (337), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-10-17 17:22:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 468 transitions. [2022-10-17 17:22:26,361 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 468 transitions. Word has length 167 [2022-10-17 17:22:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:26,363 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 468 transitions. [2022-10-17 17:22:26,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-10-17 17:22:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 468 transitions. [2022-10-17 17:22:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-10-17 17:22:26,370 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:26,370 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:22:26,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1378627356, now seen corresponding path program 1 times [2022-10-17 17:22:26,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:26,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202629918] [2022-10-17 17:22:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:26,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-10-17 17:22:26,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:26,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202629918] [2022-10-17 17:22:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202629918] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:26,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:26,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425802057] [2022-10-17 17:22:26,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:26,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:26,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:26,965 INFO L87 Difference]: Start difference. First operand 331 states and 468 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 17:22:28,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:22:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:28,952 INFO L93 Difference]: Finished difference Result 655 states and 937 transitions. [2022-10-17 17:22:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 175 [2022-10-17 17:22:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:28,958 INFO L225 Difference]: With dead ends: 655 [2022-10-17 17:22:28,958 INFO L226 Difference]: Without dead ends: 342 [2022-10-17 17:22:28,960 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 [2022-10-17 17:22:28,961 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 8 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:28,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 660 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:22:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-10-17 17:22:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 332. [2022-10-17 17:22:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 237 states have (on average 1.4261603375527425) internal successors, (338), 240 states have internal predecessors, (338), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-10-17 17:22:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 469 transitions. [2022-10-17 17:22:28,983 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 469 transitions. Word has length 175 [2022-10-17 17:22:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:28,984 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 469 transitions. [2022-10-17 17:22:28,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 17:22:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 469 transitions. [2022-10-17 17:22:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-10-17 17:22:28,988 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:28,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:28,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:22:28,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1420572931, now seen corresponding path program 1 times [2022-10-17 17:22:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:28,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063308862] [2022-10-17 17:22:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-10-17 17:22:29,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:29,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063308862] [2022-10-17 17:22:29,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063308862] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:29,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569926502] [2022-10-17 17:22:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:29,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:22:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-17 17:22:30,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569926502] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:30,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:22:30,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 17:22:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682396359] [2022-10-17 17:22:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:30,277 INFO L87 Difference]: Start difference. First operand 332 states and 469 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 17:22:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:31,878 INFO L93 Difference]: Finished difference Result 652 states and 931 transitions. [2022-10-17 17:22:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 178 [2022-10-17 17:22:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:31,883 INFO L225 Difference]: With dead ends: 652 [2022-10-17 17:22:31,884 INFO L226 Difference]: Without dead ends: 338 [2022-10-17 17:22:31,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:22:31,887 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 2 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:31,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 651 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 17:22:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-10-17 17:22:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-10-17 17:22:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 241 states have (on average 1.4273858921161826) internal successors, (344), 244 states have internal predecessors, (344), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-10-17 17:22:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 475 transitions. [2022-10-17 17:22:31,912 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 475 transitions. Word has length 178 [2022-10-17 17:22:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:31,914 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 475 transitions. [2022-10-17 17:22:31,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 17:22:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 475 transitions. [2022-10-17 17:22:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-10-17 17:22:31,919 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:31,919 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:31,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:32,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:32,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash 913438287, now seen corresponding path program 1 times [2022-10-17 17:22:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704442052] [2022-10-17 17:22:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:32,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-10-17 17:22:32,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704442052] [2022-10-17 17:22:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704442052] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163310521] [2022-10-17 17:22:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:32,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:32,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:32,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:22:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:22:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-10-17 17:22:33,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:33,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163310521] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:33,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:22:33,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-10-17 17:22:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189858705] [2022-10-17 17:22:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:33,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:33,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:22:33,615 INFO L87 Difference]: Start difference. First operand 336 states and 475 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, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 17:22:35,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:22:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:35,920 INFO L93 Difference]: Finished difference Result 656 states and 929 transitions. [2022-10-17 17:22:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:35,921 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, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 189 [2022-10-17 17:22:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:35,924 INFO L225 Difference]: With dead ends: 656 [2022-10-17 17:22:35,924 INFO L226 Difference]: Without dead ends: 336 [2022-10-17 17:22:35,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:22:35,927 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:35,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 982 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-10-17 17:22:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-10-17 17:22:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-10-17 17:22:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 241 states have (on average 1.4232365145228216) internal successors, (343), 244 states have internal predecessors, (343), 66 states have call successors, (66), 29 states have call predecessors, (66), 28 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-10-17 17:22:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 474 transitions. [2022-10-17 17:22:35,946 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 474 transitions. Word has length 189 [2022-10-17 17:22:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:35,947 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 474 transitions. [2022-10-17 17:22:35,947 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, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-10-17 17:22:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 474 transitions. [2022-10-17 17:22:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-10-17 17:22:35,951 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:35,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:35,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:22:36,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 901206205, now seen corresponding path program 1 times [2022-10-17 17:22:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441155350] [2022-10-17 17:22:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-10-17 17:22:36,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441155350] [2022-10-17 17:22:36,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441155350] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:22:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988962824] [2022-10-17 17:22:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:22:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:36,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:22:36,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59123c17-e262-4bff-9fe7-fcb5231d107f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:22:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:37,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-10-17 17:22:37,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:22:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-10-17 17:22:37,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988962824] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:22:37,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840260542] [2022-10-17 17:22:37,637 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-10-17 17:22:37,637 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:22:37,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:22:37,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:22:37,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:22:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:38,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 58 select indices, 58 select index equivalence classes, 521 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 0 case distinctions, treesize of input 534 treesize of output 693 [2022-10-17 17:22:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:39,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:22:39,437 INFO L244 Elim1Store]: Index analysis took 251 ms