./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-queue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7 --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 32bit --witnessprinter.graph.data.programhash af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:41:10,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:41:10,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:41:10,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:41:10,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:41:10,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:41:10,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:41:10,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:41:10,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:41:10,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:41:10,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:41:10,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:41:10,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:41:10,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:41:10,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:41:10,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:41:10,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:41:10,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:41:10,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:41:10,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:41:10,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:41:10,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:41:10,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:41:10,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:41:10,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:41:10,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:41:10,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:41:10,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:41:10,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:41:10,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:41:10,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:41:10,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:41:10,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:41:10,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:41:10,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:41:10,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:41:10,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:41:10,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:41:10,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:41:10,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:41:10,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:41:10,380 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:41:10,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:41:10,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:41:10,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:41:10,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:41:10,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:41:10,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:41:10,434 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:41:10,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:41:10,435 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:41:10,435 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:41:10,436 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:41:10,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:41:10,436 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:41:10,437 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:41:10,437 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:41:10,437 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:41:10,437 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:41:10,438 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:41:10,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:41:10,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:41:10,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:41:10,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:41:10,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:41:10,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:41:10,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:41:10,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:41:10,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:41:10,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:41:10,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:41:10,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:41:10,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:41:10,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:41:10,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:41:10,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:41:10,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:41:10,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:41:10,445 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:41:10,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:41:10,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:41:10,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:41:10,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:41:10,446 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_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 [2021-11-25 18:41:10,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:41:10,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:41:10,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:41:10,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:41:10,822 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:41:10,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/forester-heap/sll-queue-2.i [2021-11-25 18:41:10,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/data/8670f8566/f4f2dd12f3944c4a9721c472beccfec3/FLAGf281c3796 [2021-11-25 18:41:11,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:41:11,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i [2021-11-25 18:41:11,486 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/data/8670f8566/f4f2dd12f3944c4a9721c472beccfec3/FLAGf281c3796 [2021-11-25 18:41:11,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/data/8670f8566/f4f2dd12f3944c4a9721c472beccfec3 [2021-11-25 18:41:11,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:41:11,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:41:11,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:41:11,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:41:11,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:41:11,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:41:11" (1/1) ... [2021-11-25 18:41:11,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659a96a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:11, skipping insertion in model container [2021-11-25 18:41:11,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:41:11" (1/1) ... [2021-11-25 18:41:11,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:41:11,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:41:12,243 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2021-11-25 18:41:12,248 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2021-11-25 18:41:12,249 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2021-11-25 18:41:12,250 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2021-11-25 18:41:12,251 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2021-11-25 18:41:12,252 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2021-11-25 18:41:12,253 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2021-11-25 18:41:12,254 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2021-11-25 18:41:12,255 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2021-11-25 18:41:12,256 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2021-11-25 18:41:12,257 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2021-11-25 18:41:12,259 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2021-11-25 18:41:12,260 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2021-11-25 18:41:12,262 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2021-11-25 18:41:12,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:41:12,274 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:41:12,319 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2021-11-25 18:41:12,333 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2021-11-25 18:41:12,336 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2021-11-25 18:41:12,339 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2021-11-25 18:41:12,341 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2021-11-25 18:41:12,343 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2021-11-25 18:41:12,344 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2021-11-25 18:41:12,348 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2021-11-25 18:41:12,349 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2021-11-25 18:41:12,350 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2021-11-25 18:41:12,351 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2021-11-25 18:41:12,352 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2021-11-25 18:41:12,353 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2021-11-25 18:41:12,354 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_6d88473d-52f2-466a-bed0-0142d3fcf594/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2021-11-25 18:41:12,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:41:12,396 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:41:12,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12 WrapperNode [2021-11-25 18:41:12,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:41:12,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:41:12,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:41:12,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:41:12,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,476 INFO L137 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 219 [2021-11-25 18:41:12,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:41:12,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:41:12,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:41:12,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:41:12,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:41:12,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:41:12,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:41:12,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:41:12,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (1/1) ... [2021-11-25 18:41:12,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:41:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:12,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:41:12,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:41:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:41:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:41:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:41:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:41:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:41:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:41:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:41:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:41:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:41:12,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:41:12,754 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:41:12,756 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:41:13,096 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:41:13,189 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:41:13,189 INFO L301 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-25 18:41:13,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:41:13 BoogieIcfgContainer [2021-11-25 18:41:13,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:41:13,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:41:13,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:41:13,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:41:13,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:41:11" (1/3) ... [2021-11-25 18:41:13,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ef8222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:41:13, skipping insertion in model container [2021-11-25 18:41:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:41:12" (2/3) ... [2021-11-25 18:41:13,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ef8222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:41:13, skipping insertion in model container [2021-11-25 18:41:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:41:13" (3/3) ... [2021-11-25 18:41:13,221 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2021-11-25 18:41:13,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:41:13,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-25 18:41:13,277 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:41:13,284 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 [2021-11-25 18:41:13,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-25 18:41:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 75 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:41:13,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:13,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:41:13,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-25 18:41:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 11175788, now seen corresponding path program 1 times [2021-11-25 18:41:13,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:13,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337788032] [2021-11-25 18:41:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:13,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:13,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337788032] [2021-11-25 18:41:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337788032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:13,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:13,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:41:13,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976716381] [2021-11-25 18:41:13,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:13,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:41:13,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:41:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:41:13,541 INFO L87 Difference]: Start difference. First operand has 76 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 75 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:13,604 INFO L93 Difference]: Finished difference Result 151 states and 249 transitions. [2021-11-25 18:41:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:41:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 18:41:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:13,619 INFO L225 Difference]: With dead ends: 151 [2021-11-25 18:41:13,620 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 18:41:13,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:41:13,631 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:13,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 18:41:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-25 18:41:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.3) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-11-25 18:41:13,676 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 4 [2021-11-25 18:41:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:13,677 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-11-25 18:41:13,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-11-25 18:41:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:41:13,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:13,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:41:13,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:41:13,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-25 18:41:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash 345025043, now seen corresponding path program 1 times [2021-11-25 18:41:13,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220151922] [2021-11-25 18:41:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:13,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:13,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220151922] [2021-11-25 18:41:13,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220151922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:13,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:13,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:41:13,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621062791] [2021-11-25 18:41:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:13,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:13,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:13,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:13,782 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:13,836 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-11-25 18:41:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:41:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:13,838 INFO L225 Difference]: With dead ends: 74 [2021-11-25 18:41:13,839 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 18:41:13,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:13,841 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:13,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 51 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 18:41:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-25 18:41:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-25 18:41:13,850 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 5 [2021-11-25 18:41:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-25 18:41:13,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-25 18:41:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:41:13,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:13,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:13,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:41:13,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-25 18:41:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 856712023, now seen corresponding path program 1 times [2021-11-25 18:41:13,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:13,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432463928] [2021-11-25 18:41:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:13,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:13,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432463928] [2021-11-25 18:41:13,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432463928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:13,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:13,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:13,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81311336] [2021-11-25 18:41:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:13,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:13,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:13,985 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:14,017 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-11-25 18:41:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:41:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:14,019 INFO L225 Difference]: With dead ends: 64 [2021-11-25 18:41:14,019 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 18:41:14,019 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 [2021-11-25 18:41:14,021 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 53 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:14,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 66 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 18:41:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-25 18:41:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-25 18:41:14,029 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 7 [2021-11-25 18:41:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:14,029 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-25 18:41:14,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-25 18:41:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:41:14,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:14,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:14,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:41:14,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-25 18:41:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash 630794574, now seen corresponding path program 1 times [2021-11-25 18:41:14,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258536705] [2021-11-25 18:41:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:14,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:14,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258536705] [2021-11-25 18:41:14,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258536705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:14,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:14,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:41:14,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993465156] [2021-11-25 18:41:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:41:14,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:41:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:14,073 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:14,122 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-11-25 18:41:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:41:14,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:41:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:14,124 INFO L225 Difference]: With dead ends: 130 [2021-11-25 18:41:14,124 INFO L226 Difference]: Without dead ends: 78 [2021-11-25 18:41:14,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:41:14,138 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:14,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-25 18:41:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2021-11-25 18:41:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-11-25 18:41:14,157 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 11 [2021-11-25 18:41:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:14,158 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-11-25 18:41:14,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-11-25 18:41:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:41:14,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:14,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:14,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:41:14,166 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-25 18:41:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2084418584, now seen corresponding path program 1 times [2021-11-25 18:41:14,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238126627] [2021-11-25 18:41:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:14,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:14,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:14,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238126627] [2021-11-25 18:41:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238126627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:14,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:14,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:41:14,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283354016] [2021-11-25 18:41:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:14,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:41:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:41:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:41:14,229 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:14,312 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-11-25 18:41:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:41:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 18:41:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:14,317 INFO L225 Difference]: With dead ends: 78 [2021-11-25 18:41:14,317 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 18:41:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:41:14,319 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 3 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 171 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:41:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 18:41:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-25 18:41:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-25 18:41:14,327 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 14 [2021-11-25 18:41:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:14,327 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-25 18:41:14,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:41:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-25 18:41:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:41:14,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:14,328 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:14,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:41:14,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-25 18:41:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash 257003891, now seen corresponding path program 1 times [2021-11-25 18:41:14,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:14,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072809749] [2021-11-25 18:41:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:14,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072809749] [2021-11-25 18:41:14,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072809749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17741083] [2021-11-25 18:41:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:14,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:14,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:14,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d88473d-52f2-466a-bed0-0142d3fcf594/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:41:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:41:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:14,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:14,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 18:41:14,906 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:41:14,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-11-25 18:41:14,917 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:41:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:41:15,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-25 18:41:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:41:15,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:15,389 INFO L354 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2021-11-25 18:41:15,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 165 treesize of output 176 [2021-11-25 18:41:15,453 INFO L354 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2021-11-25 18:41:15,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 138 [2021-11-25 18:41:15,503 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 18:41:15,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 127 [2021-11-25 18:41:15,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:15,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2021-11-25 18:41:15,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-11-25 18:41:15,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:15,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 82 [2021-11-25 18:41:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45