./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P --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 2ecffe8a5f60817da30887d6b361935e398ff8703e4fd5b17747e558625c4088 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:35:09,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:35:09,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:35:09,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:35:09,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:35:09,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:35:09,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:35:09,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:35:09,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:35:09,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:35:09,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:35:09,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:35:09,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:35:09,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:35:09,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:35:09,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:35:09,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:35:09,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:35:09,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:35:09,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:35:09,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:35:09,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:35:09,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:35:09,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:35:09,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:35:09,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:35:09,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:35:09,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:35:09,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:35:09,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:35:09,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:35:09,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:35:09,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:35:09,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:35:09,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:35:09,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:35:09,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:35:09,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:35:09,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:35:09,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:35:09,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:35:09,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:35:09,259 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:35:09,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:35:09,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:35:09,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:35:09,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:35:09,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:35:09,261 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:35:09,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:35:09,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:35:09,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:35:09,263 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:35:09,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:35:09,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:35:09,264 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:35:09,264 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:35:09,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:35:09,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:35:09,265 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:35:09,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:35:09,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:35:09,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:35:09,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:35:09,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:35:09,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:35:09,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:35:09,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:35:09,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:35:09,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:35:09,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:35:09,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:35:09,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:35:09,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:35:09,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:35:09,269 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:35:09,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:35:09,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:35:09,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:35:09,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:35:09,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ecffe8a5f60817da30887d6b361935e398ff8703e4fd5b17747e558625c4088 [2021-11-21 01:35:09,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:35:09,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:35:09,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:35:09,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:35:09,628 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:35:09,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-21 01:35:09,712 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/data/e8ad428c2/b7f619a1c1ef40a291ff53dc64945d97/FLAG3f651e271 [2021-11-21 01:35:10,896 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:35:10,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-21 01:35:11,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/data/e8ad428c2/b7f619a1c1ef40a291ff53dc64945d97/FLAG3f651e271 [2021-11-21 01:35:11,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/data/e8ad428c2/b7f619a1c1ef40a291ff53dc64945d97 [2021-11-21 01:35:11,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:35:11,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:35:11,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:35:11,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:35:11,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:35:11,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7377f498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11, skipping insertion in model container [2021-11-21 01:35:11,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:35:11,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:35:14,209 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_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[331724,331737] [2021-11-21 01:35:14,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:35:14,407 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:35:15,136 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_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[331724,331737] [2021-11-21 01:35:15,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:35:15,307 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:35:15,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15 WrapperNode [2021-11-21 01:35:15,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:35:15,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:35:15,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:35:15,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:35:15,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:15,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:15,877 INFO L137 Inliner]: procedures = 273, calls = 4073, calls flagged for inlining = 105, calls inlined = 96, statements flattened = 8857 [2021-11-21 01:35:15,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:35:15,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:35:15,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:35:15,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:35:15,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:15,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:15,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:15,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:16,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:16,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:16,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:16,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:35:16,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:35:16,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:35:16,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:35:16,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (1/1) ... [2021-11-21 01:35:16,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:35:16,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:16,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:35:16,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:35:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-21 01:35:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-21 01:35:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure osst_log_options [2021-11-21 01:35:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_log_options [2021-11-21 01:35:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-21 01:35:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-21 01:35:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-21 01:35:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-21 01:35:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-21 01:35:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:35:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:35:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_behind_check [2021-11-21 01:35:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_behind_check [2021-11-21 01:35:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-21 01:35:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-21 01:35:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-21 01:35:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-21 01:35:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-21 01:35:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-21 01:35:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2021-11-21 01:35:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2021-11-21 01:35:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure osst_release_request [2021-11-21 01:35:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_release_request [2021-11-21 01:35:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:35:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:35:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure osst_set_frame_position [2021-11-21 01:35:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_set_frame_position [2021-11-21 01:35:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_header [2021-11-21 01:35:16,606 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_header [2021-11-21 01:35:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_osst_tape [2021-11-21 01:35:16,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_osst_tape [2021-11-21 01:35:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_osst_tape [2021-11-21 01:35:16,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_osst_tape [2021-11-21 01:35:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 01:35:16,607 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 01:35:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:35:16,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:35:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-21 01:35:16,608 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-21 01:35:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_frame [2021-11-21 01:35:16,608 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_frame [2021-11-21 01:35:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-21 01:35:16,608 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-21 01:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-21 01:35:16,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-21 01:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_device_put [2021-11-21 01:35:16,609 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_device_put [2021-11-21 01:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:35:16,610 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:35:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_write_buffer [2021-11-21 01:35:16,610 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_write_buffer [2021-11-21 01:35:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure osst_initiate_read [2021-11-21 01:35:16,610 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_initiate_read [2021-11-21 01:35:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-21 01:35:16,611 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-21 01:35:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2021-11-21 01:35:16,611 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2021-11-21 01:35:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure osst_seek_logical_blk [2021-11-21 01:35:16,612 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_seek_logical_blk [2021-11-21 01:35:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_osst_int_mutex [2021-11-21 01:35:16,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_osst_int_mutex [2021-11-21 01:35:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_trailer [2021-11-21 01:35:16,612 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_trailer [2021-11-21 01:35:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_drive_buffer [2021-11-21 01:35:16,613 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_drive_buffer [2021-11-21 01:35:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:35:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_osst_int_mutex [2021-11-21 01:35:16,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_osst_int_mutex [2021-11-21 01:35:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 01:35:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure osst_int_ioctl [2021-11-21 01:35:16,614 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_int_ioctl [2021-11-21 01:35:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-21 01:35:16,614 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-21 01:35:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-21 01:35:16,615 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-21 01:35:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:35:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_to_buffer [2021-11-21 01:35:16,615 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_to_buffer [2021-11-21 01:35:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_analyze_headers [2021-11-21 01:35:16,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_analyze_headers [2021-11-21 01:35:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-21 01:35:16,616 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-21 01:35:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_logical_frame [2021-11-21 01:35:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_logical_frame [2021-11-21 01:35:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-21 01:35:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-21 01:35:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-21 01:35:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-21 01:35:16,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:35:16,618 INFO L130 BoogieDeclarations]: Found specification of procedure osst_position_tape_and_confirm [2021-11-21 01:35:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_position_tape_and_confirm [2021-11-21 01:35:16,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:35:16,618 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-21 01:35:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-21 01:35:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-21 01:35:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-21 01:35:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-21 01:35:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-21 01:35:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure osst_verify_frame [2021-11-21 01:35:16,620 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_verify_frame [2021-11-21 01:35:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-21 01:35:16,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-21 01:35:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_ready [2021-11-21 01:35:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_ready [2021-11-21 01:35:16,621 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reset_header [2021-11-21 01:35:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reset_header [2021-11-21 01:35:16,621 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-21 01:35:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-21 01:35:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:35:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-21 01:35:16,622 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-21 01:35:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure osst_do_scsi [2021-11-21 01:35:16,622 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_do_scsi [2021-11-21 01:35:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-21 01:35:16,623 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-21 01:35:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:35:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev [2021-11-21 01:35:16,623 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev [2021-11-21 01:35:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:35:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure osst_chk_result [2021-11-21 01:35:16,624 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_chk_result [2021-11-21 01:35:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_add [2021-11-21 01:35:16,624 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_add [2021-11-21 01:35:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:35:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:35:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_backward [2021-11-21 01:35:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_backward [2021-11-21 01:35:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_back_buffer_and_rewrite [2021-11-21 01:35:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_back_buffer_and_rewrite [2021-11-21 01:35:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-21 01:35:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-21 01:35:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_cleanup [2021-11-21 01:35:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_cleanup [2021-11-21 01:35:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 01:35:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 01:35:16,632 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_buffer [2021-11-21 01:35:16,632 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_buffer [2021-11-21 01:35:16,632 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-21 01:35:16,632 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-21 01:35:16,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:35:16,632 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-21 01:35:16,632 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-21 01:35:16,633 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reposition_and_retry [2021-11-21 01:35:16,633 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reposition_and_retry [2021-11-21 01:35:16,633 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_filemark [2021-11-21 01:35:16,633 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_filemark [2021-11-21 01:35:16,633 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_destroy [2021-11-21 01:35:16,633 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_destroy [2021-11-21 01:35:16,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:35:16,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:35:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-11-21 01:35:16,634 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-11-21 01:35:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:35:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-21 01:35:16,634 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-21 01:35:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2021-11-21 01:35:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2021-11-21 01:35:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-21 01:35:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-21 01:35:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:35:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_write_header [2021-11-21 01:35:16,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_write_header [2021-11-21 01:35:16,635 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_frame [2021-11-21 01:35:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_frame [2021-11-21 01:35:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-21 01:35:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-21 01:35:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:35:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-21 01:35:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_frame_position [2021-11-21 01:35:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_frame_position [2021-11-21 01:35:16,637 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_buffer [2021-11-21 01:35:16,637 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_buffer [2021-11-21 01:35:16,637 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_from_buffer [2021-11-21 01:35:16,637 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_from_buffer [2021-11-21 01:35:16,637 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-21 01:35:16,637 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-21 01:35:16,637 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-21 01:35:16,637 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-21 01:35:16,638 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-21 01:35:16,638 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-21 01:35:16,638 INFO L130 BoogieDeclarations]: Found specification of procedure osst_init_aux [2021-11-21 01:35:16,638 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_init_aux [2021-11-21 01:35:16,638 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_error_recovery [2021-11-21 01:35:16,638 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_error_recovery [2021-11-21 01:35:16,638 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_eod [2021-11-21 01:35:16,639 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_eod [2021-11-21 01:35:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-21 01:35:16,641 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-21 01:35:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_forward_slow [2021-11-21 01:35:16,641 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_forward_slow [2021-11-21 01:35:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-21 01:35:16,641 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-21 01:35:16,641 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2021-11-21 01:35:16,642 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2021-11-21 01:35:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:35:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure osst_recover_wait_frame [2021-11-21 01:35:16,642 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_recover_wait_frame [2021-11-21 01:35:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_frame [2021-11-21 01:35:16,642 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_frame [2021-11-21 01:35:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:35:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:35:16,643 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-21 01:35:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-21 01:35:18,049 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:35:18,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:35:34,488 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:35:39,684 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:35:39,684 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:35:39,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:35:39 BoogieIcfgContainer [2021-11-21 01:35:39,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:35:39,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:35:39,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:35:39,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:35:39,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:35:11" (1/3) ... [2021-11-21 01:35:39,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639c08b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:35:39, skipping insertion in model container [2021-11-21 01:35:39,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:15" (2/3) ... [2021-11-21 01:35:39,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639c08b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:35:39, skipping insertion in model container [2021-11-21 01:35:39,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:35:39" (3/3) ... [2021-11-21 01:35:39,702 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-21 01:35:39,708 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:35:39,709 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:35:39,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:35:39,801 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:35:39,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:35:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 2157 states, 1460 states have (on average 1.4) internal successors, (2044), 1486 states have internal predecessors, (2044), 603 states have call successors, (603), 92 states have call predecessors, (603), 92 states have return successors, (603), 600 states have call predecessors, (603), 603 states have call successors, (603) [2021-11-21 01:35:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:35:39,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:39,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:39,915 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1203273931, now seen corresponding path program 1 times [2021-11-21 01:35:39,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:39,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441074359] [2021-11-21 01:35:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:39,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:40,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:40,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441074359] [2021-11-21 01:35:40,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441074359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:40,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:40,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:35:40,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283819509] [2021-11-21 01:35:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:40,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:35:40,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:35:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:35:40,788 INFO L87 Difference]: Start difference. First operand has 2157 states, 1460 states have (on average 1.4) internal successors, (2044), 1486 states have internal predecessors, (2044), 603 states have call successors, (603), 92 states have call predecessors, (603), 92 states have return successors, (603), 600 states have call predecessors, (603), 603 states have call successors, (603) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:35:45,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:35:50,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:35:55,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:01,664 INFO L93 Difference]: Finished difference Result 6493 states and 10178 transitions. [2021-11-21 01:36:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:36:01,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2021-11-21 01:36:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:01,742 INFO L225 Difference]: With dead ends: 6493 [2021-11-21 01:36:01,742 INFO L226 Difference]: Without dead ends: 4342 [2021-11-21 01:36:01,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:01,778 INFO L933 BasicCegarLoop]: 4472 mSDtfsCounter, 2332 mSDsluCounter, 8239 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 427 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2759 SdHoareTripleChecker+Valid, 11872 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:01,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2759 Valid, 11872 Invalid, 1789 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [427 Valid, 1360 Invalid, 2 Unknown, 0 Unchecked, 20.3s Time] [2021-11-21 01:36:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-11-21 01:36:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 2151. [2021-11-21 01:36:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 1456 states have (on average 1.3956043956043955) internal successors, (2032), 1480 states have internal predecessors, (2032), 603 states have call successors, (603), 92 states have call predecessors, (603), 91 states have return successors, (595), 592 states have call predecessors, (595), 595 states have call successors, (595) [2021-11-21 01:36:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3230 transitions. [2021-11-21 01:36:02,082 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3230 transitions. Word has length 26 [2021-11-21 01:36:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:02,083 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 3230 transitions. [2021-11-21 01:36:02,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:36:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3230 transitions. [2021-11-21 01:36:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:36:02,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:02,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:36:02,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1269010479, now seen corresponding path program 1 times [2021-11-21 01:36:02,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011713622] [2021-11-21 01:36:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:02,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:02,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:02,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011713622] [2021-11-21 01:36:02,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011713622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:02,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:02,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:36:02,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430907915] [2021-11-21 01:36:02,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:02,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:36:02,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:36:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:36:02,323 INFO L87 Difference]: Start difference. First operand 2151 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:36:06,973 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:11,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:36:16,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:23,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:25,196 INFO L93 Difference]: Finished difference Result 3616 states and 5592 transitions. [2021-11-21 01:36:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:36:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-21 01:36:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:25,241 INFO L225 Difference]: With dead ends: 3616 [2021-11-21 01:36:25,241 INFO L226 Difference]: Without dead ends: 3605 [2021-11-21 01:36:25,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:25,248 INFO L933 BasicCegarLoop]: 3723 mSDtfsCounter, 1852 mSDsluCounter, 6899 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 425 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 9922 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:25,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2064 Valid, 9922 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1139 Invalid, 3 Unknown, 0 Unchecked, 22.2s Time] [2021-11-21 01:36:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-11-21 01:36:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2153. [2021-11-21 01:36:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 1458 states have (on average 1.3950617283950617) internal successors, (2034), 1482 states have internal predecessors, (2034), 603 states have call successors, (603), 92 states have call predecessors, (603), 91 states have return successors, (595), 592 states have call predecessors, (595), 595 states have call successors, (595) [2021-11-21 01:36:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3232 transitions. [2021-11-21 01:36:25,402 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3232 transitions. Word has length 29 [2021-11-21 01:36:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:25,403 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3232 transitions. [2021-11-21 01:36:25,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:36:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3232 transitions. [2021-11-21 01:36:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:36:25,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:25,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:25,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:36:25,405 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1569204863, now seen corresponding path program 1 times [2021-11-21 01:36:25,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:25,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930605976] [2021-11-21 01:36:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:25,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:25,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930605976] [2021-11-21 01:36:25,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930605976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:25,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:25,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:36:25,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77502668] [2021-11-21 01:36:25,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:25,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:25,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:25,604 INFO L87 Difference]: Start difference. First operand 2153 states and 3232 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:36:28,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:31,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:36:34,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:39,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:41,220 INFO L93 Difference]: Finished difference Result 4228 states and 6343 transitions. [2021-11-21 01:36:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2021-11-21 01:36:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:41,274 INFO L225 Difference]: With dead ends: 4228 [2021-11-21 01:36:41,274 INFO L226 Difference]: Without dead ends: 4225 [2021-11-21 01:36:41,279 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:36:41,281 INFO L933 BasicCegarLoop]: 3447 mSDtfsCounter, 3133 mSDsluCounter, 3182 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3133 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:41,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3133 Valid, 6284 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2021-11-21 01:36:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-11-21 01:36:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 4219. [2021-11-21 01:36:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 2865 states have (on average 1.3951134380453751) internal successors, (3997), 2902 states have internal predecessors, (3997), 1173 states have call successors, (1173), 181 states have call predecessors, (1173), 180 states have return successors, (1165), 1160 states have call predecessors, (1165), 1165 states have call successors, (1165) [2021-11-21 01:36:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 6335 transitions. [2021-11-21 01:36:41,587 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 6335 transitions. Word has length 30 [2021-11-21 01:36:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:41,588 INFO L470 AbstractCegarLoop]: Abstraction has 4219 states and 6335 transitions. [2021-11-21 01:36:41,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:36:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 6335 transitions. [2021-11-21 01:36:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:36:41,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:41,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:41,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:36:41,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1401834699, now seen corresponding path program 1 times [2021-11-21 01:36:41,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246908594] [2021-11-21 01:36:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:41,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:41,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246908594] [2021-11-21 01:36:41,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246908594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:41,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:41,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:36:41,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922441872] [2021-11-21 01:36:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:41,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:41,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:41,805 INFO L87 Difference]: Start difference. First operand 4219 states and 6335 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:36:45,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:49,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:36:51,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:53,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:55,861 INFO L93 Difference]: Finished difference Result 7111 states and 10577 transitions. [2021-11-21 01:36:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2021-11-21 01:36:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:55,934 INFO L225 Difference]: With dead ends: 7111 [2021-11-21 01:36:55,934 INFO L226 Difference]: Without dead ends: 7107 [2021-11-21 01:36:55,942 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:36:55,943 INFO L933 BasicCegarLoop]: 3696 mSDtfsCounter, 2174 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2174 SdHoareTripleChecker+Valid, 6506 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:55,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2174 Valid, 6506 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 761 Invalid, 2 Unknown, 0 Unchecked, 13.8s Time] [2021-11-21 01:36:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7107 states. [2021-11-21 01:36:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7107 to 7102. [2021-11-21 01:36:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7102 states, 4764 states have (on average 1.3772040302267003) internal successors, (6561), 4827 states have internal predecessors, (6561), 2007 states have call successors, (2007), 333 states have call predecessors, (2007), 330 states have return successors, (1999), 1986 states have call predecessors, (1999), 1999 states have call successors, (1999) [2021-11-21 01:36:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7102 states to 7102 states and 10567 transitions. [2021-11-21 01:36:56,391 INFO L78 Accepts]: Start accepts. Automaton has 7102 states and 10567 transitions. Word has length 31 [2021-11-21 01:36:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:56,392 INFO L470 AbstractCegarLoop]: Abstraction has 7102 states and 10567 transitions. [2021-11-21 01:36:56,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:36:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 7102 states and 10567 transitions. [2021-11-21 01:36:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:36:56,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:56,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:56,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:36:56,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -508322044, now seen corresponding path program 1 times [2021-11-21 01:36:56,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:56,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999610496] [2021-11-21 01:36:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:56,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:56,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999610496] [2021-11-21 01:36:56,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999610496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:56,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:56,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:36:56,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321698837] [2021-11-21 01:36:56,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:56,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:56,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:56,617 INFO L87 Difference]: Start difference. First operand 7102 states and 10567 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:36:59,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:03,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:37:09,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:11,420 INFO L93 Difference]: Finished difference Result 7115 states and 10580 transitions. [2021-11-21 01:37:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-11-21 01:37:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:11,492 INFO L225 Difference]: With dead ends: 7115 [2021-11-21 01:37:11,492 INFO L226 Difference]: Without dead ends: 7112 [2021-11-21 01:37:11,499 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:37:11,500 INFO L933 BasicCegarLoop]: 3444 mSDtfsCounter, 3129 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3129 SdHoareTripleChecker+Valid, 6287 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:11,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3129 Valid, 6287 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 14.6s Time] [2021-11-21 01:37:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7112 states. [2021-11-21 01:37:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7112 to 7105. [2021-11-21 01:37:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 4767 states have (on average 1.3771764212292847) internal successors, (6565), 4830 states have internal predecessors, (6565), 2007 states have call successors, (2007), 333 states have call predecessors, (2007), 330 states have return successors, (1999), 1986 states have call predecessors, (1999), 1999 states have call successors, (1999) [2021-11-21 01:37:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 10571 transitions. [2021-11-21 01:37:11,901 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 10571 transitions. Word has length 32 [2021-11-21 01:37:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:11,902 INFO L470 AbstractCegarLoop]: Abstraction has 7105 states and 10571 transitions. [2021-11-21 01:37:11,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:37:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 10571 transitions. [2021-11-21 01:37:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:37:11,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:11,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:37:11,904 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1420771352, now seen corresponding path program 1 times [2021-11-21 01:37:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:11,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591805877] [2021-11-21 01:37:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:11,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:12,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591805877] [2021-11-21 01:37:12,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591805877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:12,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:12,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:37:12,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768501014] [2021-11-21 01:37:12,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:12,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:12,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:12,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:12,113 INFO L87 Difference]: Start difference. First operand 7105 states and 10571 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:37:14,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:37:17,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:19,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:21,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:25,165 INFO L93 Difference]: Finished difference Result 11059 states and 16224 transitions. [2021-11-21 01:37:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-11-21 01:37:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:25,250 INFO L225 Difference]: With dead ends: 11059 [2021-11-21 01:37:25,250 INFO L226 Difference]: Without dead ends: 11028 [2021-11-21 01:37:25,262 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:37:25,263 INFO L933 BasicCegarLoop]: 3242 mSDtfsCounter, 2019 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 6066 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:25,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 6066 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2021-11-21 01:37:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11028 states. [2021-11-21 01:37:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11028 to 11019. [2021-11-21 01:37:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11019 states, 7342 states have (on average 1.360664669027513) internal successors, (9990), 7439 states have internal predecessors, (9990), 3089 states have call successors, (3089), 594 states have call predecessors, (3089), 587 states have return successors, (3081), 3058 states have call predecessors, (3081), 3081 states have call successors, (3081) [2021-11-21 01:37:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11019 states to 11019 states and 16160 transitions. [2021-11-21 01:37:25,888 INFO L78 Accepts]: Start accepts. Automaton has 11019 states and 16160 transitions. Word has length 33 [2021-11-21 01:37:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 11019 states and 16160 transitions. [2021-11-21 01:37:25,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:37:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 11019 states and 16160 transitions. [2021-11-21 01:37:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:37:25,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:25,893 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:25,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:37:25,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1353491132, now seen corresponding path program 1 times [2021-11-21 01:37:25,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:25,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385073698] [2021-11-21 01:37:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:25,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:26,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385073698] [2021-11-21 01:37:26,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385073698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:26,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:26,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:37:26,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587271886] [2021-11-21 01:37:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:26,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:26,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:26,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:26,088 INFO L87 Difference]: Start difference. First operand 11019 states and 16160 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:37:28,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:37:31,473 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:33,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:38,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:41,297 INFO L93 Difference]: Finished difference Result 23241 states and 34302 transitions. [2021-11-21 01:37:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-11-21 01:37:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:41,379 INFO L225 Difference]: With dead ends: 23241 [2021-11-21 01:37:41,380 INFO L226 Difference]: Without dead ends: 12257 [2021-11-21 01:37:41,471 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:37:41,472 INFO L933 BasicCegarLoop]: 2962 mSDtfsCounter, 519 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 5584 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:41,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 5584 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 674 Invalid, 3 Unknown, 0 Unchecked, 14.8s Time] [2021-11-21 01:37:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2021-11-21 01:37:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 12125. [2021-11-21 01:37:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12125 states, 8140 states have (on average 1.3717444717444718) internal successors, (11166), 8251 states have internal predecessors, (11166), 3397 states have call successors, (3397), 594 states have call predecessors, (3397), 587 states have return successors, (3389), 3360 states have call predecessors, (3389), 3389 states have call successors, (3389) [2021-11-21 01:37:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12125 states to 12125 states and 17952 transitions. [2021-11-21 01:37:42,143 INFO L78 Accepts]: Start accepts. Automaton has 12125 states and 17952 transitions. Word has length 64 [2021-11-21 01:37:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:42,144 INFO L470 AbstractCegarLoop]: Abstraction has 12125 states and 17952 transitions. [2021-11-21 01:37:42,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:37:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 12125 states and 17952 transitions. [2021-11-21 01:37:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:37:42,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:42,151 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:37:42,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:37:42,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1842189285, now seen corresponding path program 1 times [2021-11-21 01:37:42,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:42,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745506280] [2021-11-21 01:37:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:42,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:37:42,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:42,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745506280] [2021-11-21 01:37:42,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745506280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:42,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:42,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:37:42,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734920777] [2021-11-21 01:37:42,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:42,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:42,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:42,382 INFO L87 Difference]: Start difference. First operand 12125 states and 17952 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:37:45,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:37:47,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:50,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:37:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:54,377 INFO L93 Difference]: Finished difference Result 13638 states and 20066 transitions. [2021-11-21 01:37:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:54,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2021-11-21 01:37:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:54,474 INFO L225 Difference]: With dead ends: 13638 [2021-11-21 01:37:54,475 INFO L226 Difference]: Without dead ends: 13635 [2021-11-21 01:37:54,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:54,486 INFO L933 BasicCegarLoop]: 4007 mSDtfsCounter, 2398 mSDsluCounter, 2128 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 5904 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:54,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2398 Valid, 5904 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 719 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2021-11-21 01:37:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13635 states. [2021-11-21 01:37:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13635 to 13631. [2021-11-21 01:37:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13631 states, 9113 states have (on average 1.3643147152419621) internal successors, (12433), 9237 states have internal predecessors, (12433), 3816 states have call successors, (3816), 710 states have call predecessors, (3816), 701 states have return successors, (3808), 3776 states have call predecessors, (3808), 3808 states have call successors, (3808) [2021-11-21 01:37:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13631 states to 13631 states and 20057 transitions. [2021-11-21 01:37:55,255 INFO L78 Accepts]: Start accepts. Automaton has 13631 states and 20057 transitions. Word has length 66 [2021-11-21 01:37:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:55,257 INFO L470 AbstractCegarLoop]: Abstraction has 13631 states and 20057 transitions. [2021-11-21 01:37:55,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:37:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 13631 states and 20057 transitions. [2021-11-21 01:37:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:37:55,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:55,264 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:55,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:37:55,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash 635305160, now seen corresponding path program 1 times [2021-11-21 01:37:55,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:55,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658536323] [2021-11-21 01:37:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:55,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:55,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658536323] [2021-11-21 01:37:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658536323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:55,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:55,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:37:55,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547694106] [2021-11-21 01:37:55,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:55,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:37:55,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:37:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:37:55,580 INFO L87 Difference]: Start difference. First operand 13631 states and 20057 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:37:59,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:38:03,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:07,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:17,468 INFO L93 Difference]: Finished difference Result 15808 states and 23317 transitions. [2021-11-21 01:38:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:38:17,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 75 [2021-11-21 01:38:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:17,562 INFO L225 Difference]: With dead ends: 15808 [2021-11-21 01:38:17,562 INFO L226 Difference]: Without dead ends: 15805 [2021-11-21 01:38:17,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:38:17,574 INFO L933 BasicCegarLoop]: 4528 mSDtfsCounter, 5681 mSDsluCounter, 8629 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 2040 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5811 SdHoareTripleChecker+Valid, 12196 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2040 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:17,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5811 Valid, 12196 Invalid, 4252 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2040 Valid, 2209 Invalid, 3 Unknown, 0 Unchecked, 21.4s Time] [2021-11-21 01:38:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15805 states. [2021-11-21 01:38:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15805 to 14773. [2021-11-21 01:38:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14773 states, 9845 states have (on average 1.3591670898933468) internal successors, (13381), 9981 states have internal predecessors, (13381), 4140 states have call successors, (4140), 798 states have call predecessors, (4140), 787 states have return successors, (4132), 4098 states have call predecessors, (4132), 4132 states have call successors, (4132) [2021-11-21 01:38:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14773 states to 14773 states and 21653 transitions. [2021-11-21 01:38:18,332 INFO L78 Accepts]: Start accepts. Automaton has 14773 states and 21653 transitions. Word has length 75 [2021-11-21 01:38:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:18,333 INFO L470 AbstractCegarLoop]: Abstraction has 14773 states and 21653 transitions. [2021-11-21 01:38:18,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:38:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 14773 states and 21653 transitions. [2021-11-21 01:38:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 01:38:18,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:18,343 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:18,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:38:18,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2073643187, now seen corresponding path program 1 times [2021-11-21 01:38:18,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061540002] [2021-11-21 01:38:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:18,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:38:18,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061540002] [2021-11-21 01:38:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061540002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:18,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:18,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:38:18,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177969803] [2021-11-21 01:38:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:18,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:38:18,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:38:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:38:18,831 INFO L87 Difference]: Start difference. First operand 14773 states and 21653 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:38:22,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:38:28,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:30,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:33,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:39,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:54,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:38:56,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:38:58,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:39:00,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:39:02,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:39:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:13,036 INFO L93 Difference]: Finished difference Result 19079 states and 27919 transitions. [2021-11-21 01:39:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:39:13,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 94 [2021-11-21 01:39:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:13,173 INFO L225 Difference]: With dead ends: 19079 [2021-11-21 01:39:13,173 INFO L226 Difference]: Without dead ends: 19044 [2021-11-21 01:39:13,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:39:13,193 INFO L933 BasicCegarLoop]: 2478 mSDtfsCounter, 3818 mSDsluCounter, 4181 mSDsCounter, 0 mSdLazyCounter, 9234 mSolverCounterSat, 1903 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4352 SdHoareTripleChecker+Valid, 6026 SdHoareTripleChecker+Invalid, 11146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1903 IncrementalHoareTripleChecker+Valid, 9234 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:13,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4352 Valid, 6026 Invalid, 11146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1903 Valid, 9234 Invalid, 9 Unknown, 0 Unchecked, 53.4s Time] [2021-11-21 01:39:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19044 states. [2021-11-21 01:39:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19044 to 18988. [2021-11-21 01:39:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18988 states, 12617 states have (on average 1.3559483236902592) internal successors, (17108), 12793 states have internal predecessors, (17108), 5348 states have call successors, (5348), 1033 states have call predecessors, (5348), 1022 states have return successors, (5340), 5297 states have call predecessors, (5340), 5340 states have call successors, (5340) [2021-11-21 01:39:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18988 states to 18988 states and 27796 transitions. [2021-11-21 01:39:14,188 INFO L78 Accepts]: Start accepts. Automaton has 18988 states and 27796 transitions. Word has length 94 [2021-11-21 01:39:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:14,190 INFO L470 AbstractCegarLoop]: Abstraction has 18988 states and 27796 transitions. [2021-11-21 01:39:14,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:39:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 18988 states and 27796 transitions. [2021-11-21 01:39:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 01:39:14,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:14,203 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:14,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:39:14,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1666321780, now seen corresponding path program 1 times [2021-11-21 01:39:14,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:14,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887866803] [2021-11-21 01:39:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:14,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:14,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:39:14,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986090434] [2021-11-21 01:39:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:14,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:14,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:14,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:39:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:15,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:39:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:39:16,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:16,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:16,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887866803] [2021-11-21 01:39:16,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:39:16,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986090434] [2021-11-21 01:39:16,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986090434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:16,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:39:16,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:39:16,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494789634] [2021-11-21 01:39:16,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:16,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:39:16,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:39:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:39:16,194 INFO L87 Difference]: Start difference. First operand 18988 states and 27796 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:39:19,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:39:23,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:39:25,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:39:28,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:39:31,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:39:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:42,549 INFO L93 Difference]: Finished difference Result 40410 states and 59532 transitions. [2021-11-21 01:39:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:39:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 94 [2021-11-21 01:39:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:42,701 INFO L225 Difference]: With dead ends: 40410 [2021-11-21 01:39:42,701 INFO L226 Difference]: Without dead ends: 21457 [2021-11-21 01:39:42,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:39:42,859 INFO L933 BasicCegarLoop]: 3697 mSDtfsCounter, 577 mSDsluCounter, 11663 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 14114 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:42,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 14114 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1732 Invalid, 3 Unknown, 0 Unchecked, 25.6s Time] [2021-11-21 01:39:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-11-21 01:39:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 19000. [2021-11-21 01:39:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19000 states, 12627 states have (on average 1.3556664290805418) internal successors, (17118), 12801 states have internal predecessors, (17118), 5348 states have call successors, (5348), 1033 states have call predecessors, (5348), 1024 states have return successors, (5348), 5301 states have call predecessors, (5348), 5340 states have call successors, (5348) [2021-11-21 01:39:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19000 states to 19000 states and 27814 transitions. [2021-11-21 01:39:44,834 INFO L78 Accepts]: Start accepts. Automaton has 19000 states and 27814 transitions. Word has length 94 [2021-11-21 01:39:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:44,835 INFO L470 AbstractCegarLoop]: Abstraction has 19000 states and 27814 transitions. [2021-11-21 01:39:44,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:39:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 19000 states and 27814 transitions. [2021-11-21 01:39:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:39:44,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:44,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:44,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:45,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:45,067 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2045326750, now seen corresponding path program 1 times [2021-11-21 01:39:45,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:45,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051085345] [2021-11-21 01:39:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:45,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:45,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:39:45,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561254706] [2021-11-21 01:39:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:45,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:45,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:45,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:39:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:39:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:39:47,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:47,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051085345] [2021-11-21 01:39:47,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:39:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561254706] [2021-11-21 01:39:47,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561254706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:47,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:39:47,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:39:47,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917839568] [2021-11-21 01:39:47,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:47,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:39:47,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:39:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:47,218 INFO L87 Difference]: Start difference. First operand 19000 states and 27814 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:39:50,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:39:55,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:39:58,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:40:02,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:40:13,594 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:15,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:17,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:19,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:27,338 INFO L93 Difference]: Finished difference Result 20069 states and 29518 transitions. [2021-11-21 01:40:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:40:27,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 95 [2021-11-21 01:40:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:27,444 INFO L225 Difference]: With dead ends: 20069 [2021-11-21 01:40:27,444 INFO L226 Difference]: Without dead ends: 20066 [2021-11-21 01:40:27,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:40:27,460 INFO L933 BasicCegarLoop]: 4530 mSDtfsCounter, 2315 mSDsluCounter, 14899 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 56 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 17585 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:27,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2445 Valid, 17585 Invalid, 5487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 5424 Invalid, 7 Unknown, 0 Unchecked, 39.3s Time] [2021-11-21 01:40:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20066 states. [2021-11-21 01:40:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20066 to 19014. [2021-11-21 01:40:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19014 states, 12635 states have (on average 1.3554412346656115) internal successors, (17126), 12808 states have internal predecessors, (17126), 5350 states have call successors, (5350), 1038 states have call predecessors, (5350), 1028 states have return successors, (5350), 5303 states have call predecessors, (5350), 5342 states have call successors, (5350) [2021-11-21 01:40:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19014 states to 19014 states and 27826 transitions. [2021-11-21 01:40:28,761 INFO L78 Accepts]: Start accepts. Automaton has 19014 states and 27826 transitions. Word has length 95 [2021-11-21 01:40:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:28,762 INFO L470 AbstractCegarLoop]: Abstraction has 19014 states and 27826 transitions. [2021-11-21 01:40:28,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:40:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19014 states and 27826 transitions. [2021-11-21 01:40:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-21 01:40:28,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:28,778 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:28,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:29,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:40:29,006 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1048606259, now seen corresponding path program 1 times [2021-11-21 01:40:29,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:40:29,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267263791] [2021-11-21 01:40:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:29,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:40:29,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:40:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335889435] [2021-11-21 01:40:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:29,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:29,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:29,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:40:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:40:30,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:31,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:40:31,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267263791] [2021-11-21 01:40:31,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:40:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335889435] [2021-11-21 01:40:31,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335889435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:31,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:31,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:40:31,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764856946] [2021-11-21 01:40:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:31,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:40:31,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:40:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:40:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:40:31,199 INFO L87 Difference]: Start difference. First operand 19014 states and 27826 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:40:33,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:36,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:40:38,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:40:40,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:40:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:44,492 INFO L93 Difference]: Finished difference Result 19059 states and 27869 transitions. [2021-11-21 01:40:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:40:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 104 [2021-11-21 01:40:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:44,620 INFO L225 Difference]: With dead ends: 19059 [2021-11-21 01:40:44,621 INFO L226 Difference]: Without dead ends: 19056 [2021-11-21 01:40:44,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:40:44,635 INFO L933 BasicCegarLoop]: 4004 mSDtfsCounter, 2356 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2356 SdHoareTripleChecker+Valid, 5902 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:44,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2356 Valid, 5902 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 716 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2021-11-21 01:40:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19056 states. [2021-11-21 01:40:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19056 to 19037. [2021-11-21 01:40:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19037 states, 12644 states have (on average 1.3551091426763682) internal successors, (17134), 12820 states have internal predecessors, (17134), 5354 states have call successors, (5354), 1044 states have call predecessors, (5354), 1038 states have return successors, (5355), 5308 states have call predecessors, (5355), 5347 states have call successors, (5355) [2021-11-21 01:40:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19037 states to 19037 states and 27843 transitions. [2021-11-21 01:40:45,728 INFO L78 Accepts]: Start accepts. Automaton has 19037 states and 27843 transitions. Word has length 104 [2021-11-21 01:40:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:45,728 INFO L470 AbstractCegarLoop]: Abstraction has 19037 states and 27843 transitions. [2021-11-21 01:40:45,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:40:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 19037 states and 27843 transitions. [2021-11-21 01:40:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-21 01:40:45,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:45,749 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 01:40:45,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:40:45,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:45,953 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash 537151328, now seen corresponding path program 1 times [2021-11-21 01:40:45,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:40:45,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188259352] [2021-11-21 01:40:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:45,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:40:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:40:46,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:46,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188259352] [2021-11-21 01:40:46,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188259352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:46,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:46,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:40:46,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096395976] [2021-11-21 01:40:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:46,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:40:46,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:40:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:40:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:40:46,170 INFO L87 Difference]: Start difference. First operand 19037 states and 27843 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-21 01:40:49,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:50,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:52,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:40:54,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:41:00,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:03,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:11,205 INFO L93 Difference]: Finished difference Result 38175 states and 55860 transitions. [2021-11-21 01:41:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:41:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 113 [2021-11-21 01:41:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:11,302 INFO L225 Difference]: With dead ends: 38175 [2021-11-21 01:41:11,302 INFO L226 Difference]: Without dead ends: 19141 [2021-11-21 01:41:11,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:41:11,383 INFO L933 BasicCegarLoop]: 2915 mSDtfsCounter, 72 mSDsluCounter, 9690 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 39 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 11555 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:11,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 11555 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1418 Invalid, 4 Unknown, 0 Unchecked, 24.1s Time] [2021-11-21 01:41:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19141 states. [2021-11-21 01:41:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19141 to 19041. [2021-11-21 01:41:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19041 states, 12646 states have (on average 1.3541040645263325) internal successors, (17124), 12822 states have internal predecessors, (17124), 5356 states have call successors, (5356), 1044 states have call predecessors, (5356), 1038 states have return successors, (5357), 5310 states have call predecessors, (5357), 5349 states have call successors, (5357) [2021-11-21 01:41:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19041 states to 19041 states and 27837 transitions. [2021-11-21 01:41:12,408 INFO L78 Accepts]: Start accepts. Automaton has 19041 states and 27837 transitions. Word has length 113 [2021-11-21 01:41:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:12,409 INFO L470 AbstractCegarLoop]: Abstraction has 19041 states and 27837 transitions. [2021-11-21 01:41:12,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-21 01:41:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19041 states and 27837 transitions. [2021-11-21 01:41:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-21 01:41:12,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:12,433 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 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] [2021-11-21 01:41:12,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:41:12,433 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash 197462494, now seen corresponding path program 1 times [2021-11-21 01:41:12,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:12,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037261887] [2021-11-21 01:41:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:12,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:41:12,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037261887] [2021-11-21 01:41:12,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037261887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:41:12,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:41:12,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:41:12,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476364621] [2021-11-21 01:41:12,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:41:12,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:41:12,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:41:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:41:12,641 INFO L87 Difference]: Start difference. First operand 19041 states and 27837 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:41:15,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:18,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:41:22,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:24,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:27,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:34,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:37,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:47,795 INFO L93 Difference]: Finished difference Result 51133 states and 76630 transitions. [2021-11-21 01:41:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:41:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 128 [2021-11-21 01:41:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:47,947 INFO L225 Difference]: With dead ends: 51133 [2021-11-21 01:41:47,947 INFO L226 Difference]: Without dead ends: 32127 [2021-11-21 01:41:48,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:41:48,026 INFO L933 BasicCegarLoop]: 4738 mSDtfsCounter, 2385 mSDsluCounter, 8886 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 403 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 12685 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:48,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2787 Valid, 12685 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1489 Invalid, 3 Unknown, 0 Unchecked, 33.7s Time] [2021-11-21 01:41:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32127 states. [2021-11-21 01:41:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32127 to 19073. [2021-11-21 01:41:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19073 states, 12678 states have (on average 1.3532102855339958) internal successors, (17156), 12854 states have internal predecessors, (17156), 5356 states have call successors, (5356), 1044 states have call predecessors, (5356), 1038 states have return successors, (5357), 5310 states have call predecessors, (5357), 5349 states have call successors, (5357) [2021-11-21 01:41:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19073 states to 19073 states and 27869 transitions. [2021-11-21 01:41:49,505 INFO L78 Accepts]: Start accepts. Automaton has 19073 states and 27869 transitions. Word has length 128 [2021-11-21 01:41:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 19073 states and 27869 transitions. [2021-11-21 01:41:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:41:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 19073 states and 27869 transitions. [2021-11-21 01:41:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:41:49,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:49,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:49,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:41:49,532 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1481517267, now seen corresponding path program 1 times [2021-11-21 01:41:49,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:49,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045908279] [2021-11-21 01:41:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:49,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:41:49,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045908279] [2021-11-21 01:41:49,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045908279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:41:49,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:41:49,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:41:49,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33967380] [2021-11-21 01:41:49,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:41:49,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:41:49,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:41:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:41:49,712 INFO L87 Difference]: Start difference. First operand 19073 states and 27869 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 01:41:52,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:41:56,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:41:58,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:42:03,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:42:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:05,531 INFO L93 Difference]: Finished difference Result 38115 states and 55703 transitions. [2021-11-21 01:42:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2021-11-21 01:42:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:05,624 INFO L225 Difference]: With dead ends: 38115 [2021-11-21 01:42:05,625 INFO L226 Difference]: Without dead ends: 19077 [2021-11-21 01:42:05,700 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:42:05,701 INFO L933 BasicCegarLoop]: 2872 mSDtfsCounter, 0 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5743 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:05,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5743 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 699 Invalid, 4 Unknown, 0 Unchecked, 15.0s Time] [2021-11-21 01:42:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19077 states. [2021-11-21 01:42:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19077 to 19077. [2021-11-21 01:42:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19077 states, 12682 states have (on average 1.3530988803027915) internal successors, (17160), 12858 states have internal predecessors, (17160), 5356 states have call successors, (5356), 1044 states have call predecessors, (5356), 1038 states have return successors, (5357), 5310 states have call predecessors, (5357), 5349 states have call successors, (5357) [2021-11-21 01:42:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19077 states to 19077 states and 27873 transitions. [2021-11-21 01:42:06,769 INFO L78 Accepts]: Start accepts. Automaton has 19077 states and 27873 transitions. Word has length 120 [2021-11-21 01:42:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:06,770 INFO L470 AbstractCegarLoop]: Abstraction has 19077 states and 27873 transitions. [2021-11-21 01:42:06,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 01:42:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 19077 states and 27873 transitions. [2021-11-21 01:42:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-21 01:42:06,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:06,798 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 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] [2021-11-21 01:42:06,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:42:06,798 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash -803504935, now seen corresponding path program 1 times [2021-11-21 01:42:06,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:06,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142774400] [2021-11-21 01:42:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:06,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:07,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142774400] [2021-11-21 01:42:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142774400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:07,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:07,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:42:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856961999] [2021-11-21 01:42:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:07,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:07,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:42:07,082 INFO L87 Difference]: Start difference. First operand 19077 states and 27873 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:42:09,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:42:13,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:42:16,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:42:23,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:42:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:25,326 INFO L93 Difference]: Finished difference Result 34606 states and 51230 transitions. [2021-11-21 01:42:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 131 [2021-11-21 01:42:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:25,417 INFO L225 Difference]: With dead ends: 34606 [2021-11-21 01:42:25,417 INFO L226 Difference]: Without dead ends: 23637 [2021-11-21 01:42:25,454 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:42:25,455 INFO L933 BasicCegarLoop]: 3871 mSDtfsCounter, 711 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 6945 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:25,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 6945 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 825 Invalid, 2 Unknown, 0 Unchecked, 17.1s Time] [2021-11-21 01:42:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23637 states. [2021-11-21 01:42:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23637 to 19079. [2021-11-21 01:42:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19079 states, 12684 states have (on average 1.3530432040365816) internal successors, (17162), 12860 states have internal predecessors, (17162), 5356 states have call successors, (5356), 1044 states have call predecessors, (5356), 1038 states have return successors, (5357), 5310 states have call predecessors, (5357), 5349 states have call successors, (5357) [2021-11-21 01:42:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19079 states to 19079 states and 27875 transitions. [2021-11-21 01:42:26,445 INFO L78 Accepts]: Start accepts. Automaton has 19079 states and 27875 transitions. Word has length 131 [2021-11-21 01:42:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:26,448 INFO L470 AbstractCegarLoop]: Abstraction has 19079 states and 27875 transitions. [2021-11-21 01:42:26,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 01:42:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19079 states and 27875 transitions. [2021-11-21 01:42:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:42:26,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:26,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:26,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:42:26,466 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1689457006, now seen corresponding path program 1 times [2021-11-21 01:42:26,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:26,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98408213] [2021-11-21 01:42:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:26,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:42:26,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:26,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98408213] [2021-11-21 01:42:26,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98408213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:26,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055722384] [2021-11-21 01:42:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:26,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:26,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:26,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:26,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0773c8fc-426f-43d0-9dd7-e1cadc8484e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:42:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:42:28,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:42:28,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:42:28,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055722384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:28,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556521586] [2021-11-21 01:42:28,703 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2021-11-21 01:42:28,703 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:28,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:28,713 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:28,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs