./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:40:05,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:40:05,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:40:05,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:40:05,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:40:05,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:40:05,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:40:05,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:40:05,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:40:05,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:40:05,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:40:05,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:40:05,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:40:05,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:40:05,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:40:05,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:40:05,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:40:05,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:40:05,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:40:05,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:40:05,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:40:05,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:40:05,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:40:05,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:40:05,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:40:05,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:40:05,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:40:05,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:40:05,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:40:05,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:40:05,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:40:05,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:40:05,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:40:05,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:40:05,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:40:05,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:40:05,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:40:05,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:40:05,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:40:05,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:40:05,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:40:05,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:40:05,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:40:05,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:40:05,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:40:05,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:40:05,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:40:05,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:40:05,403 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:40:05,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:40:05,404 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:40:05,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:40:05,406 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:40:05,406 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:40:05,407 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:40:05,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:40:05,408 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:40:05,408 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:40:05,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:40:05,409 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:40:05,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:40:05,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:40:05,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:40:05,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:40:05,411 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:40:05,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:40:05,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:40:05,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:40:05,413 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:40:05,414 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:40:05,414 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:40:05,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:40:05,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:40:05,415 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:40:05,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:40:05,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:40:05,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:40:05,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:40:05,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:40:05,418 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:40:05,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:40:05,418 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:40:05,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:40:05,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:40:05,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-11-26 00:40:05,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:40:05,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:40:05,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:40:05,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:40:05,871 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:40:05,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-26 00:40:09,777 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:40:10,218 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:40:10,219 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-26 00:40:10,252 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/data/b9a9f50ff/0f53f00496a4497d8f71ef34d73db0ad/FLAGf3f1a61e1 [2022-11-26 00:40:10,277 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/data/b9a9f50ff/0f53f00496a4497d8f71ef34d73db0ad [2022-11-26 00:40:10,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:40:10,284 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:40:10,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:40:10,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:40:10,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:40:10,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:40:10" (1/1) ... [2022-11-26 00:40:10,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4b2d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:10, skipping insertion in model container [2022-11-26 00:40:10,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:40:10" (1/1) ... [2022-11-26 00:40:10,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:40:10,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:40:10,638 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-26 00:40:11,083 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-26 00:40:11,089 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-26 00:40:11,090 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-26 00:40:11,217 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-26 00:40:11,218 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-26 00:40:11,224 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-26 00:40:11,225 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-26 00:40:11,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:40:11,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:40:11,270 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-26 00:40:11,293 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-26 00:40:11,294 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-26 00:40:11,295 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-26 00:40:11,312 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-26 00:40:11,314 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-26 00:40:11,321 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-26 00:40:11,323 WARN L237 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_c6472a48-3d57-4d04-877b-5e42a4a42874/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-26 00:40:11,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:40:11,422 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:40:11,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11 WrapperNode [2022-11-26 00:40:11,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:40:11,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:40:11,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:40:11,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:40:11,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,504 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-11-26 00:40:11,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:40:11,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:40:11,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:40:11,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:40:11,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,569 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:40:11,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:40:11,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:40:11,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:40:11,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (1/1) ... [2022-11-26 00:40:11,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:40:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:11,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:40:11,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:40:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-11-26 00:40:11,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-11-26 00:40:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-11-26 00:40:11,692 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-11-26 00:40:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:40:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:40:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:40:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:40:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-26 00:40:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:40:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:40:11,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:40:11,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:40:11,698 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:40:11,907 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:40:11,922 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:40:12,641 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:40:12,662 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:40:12,662 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:40:12,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:40:12 BoogieIcfgContainer [2022-11-26 00:40:12,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:40:12,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:40:12,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:40:12,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:40:12,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:40:10" (1/3) ... [2022-11-26 00:40:12,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d1212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:40:12, skipping insertion in model container [2022-11-26 00:40:12,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:11" (2/3) ... [2022-11-26 00:40:12,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d1212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:40:12, skipping insertion in model container [2022-11-26 00:40:12,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:40:12" (3/3) ... [2022-11-26 00:40:12,679 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-11-26 00:40:12,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:40:12,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2022-11-26 00:40:12,703 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:40:12,885 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-26 00:40:12,933 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:40:12,956 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 293 transitions, 602 flow [2022-11-26 00:40:12,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 293 transitions, 602 flow [2022-11-26 00:40:12,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 293 transitions, 602 flow [2022-11-26 00:40:13,194 INFO L130 PetriNetUnfolder]: 17/291 cut-off events. [2022-11-26 00:40:13,195 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-26 00:40:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 291 events. 17/291 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 825 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 227. Up to 2 conditions per place. [2022-11-26 00:40:13,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 31324 [2022-11-26 00:40:26,984 INFO L134 LiptonReduction]: Checked pairs total: 108627 [2022-11-26 00:40:26,984 INFO L136 LiptonReduction]: Total number of compositions: 294 [2022-11-26 00:40:26,993 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 116 places, 119 transitions, 254 flow [2022-11-26 00:40:27,936 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24038 states, 19081 states have (on average 4.065300560767255) internal successors, (77570), 24037 states have internal predecessors, (77570), 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) [2022-11-26 00:40:27,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:40:27,964 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5793f205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:40:27,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 99 error locations. [2022-11-26 00:40:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 24038 states, 19081 states have (on average 4.065300560767255) internal successors, (77570), 24037 states have internal predecessors, (77570), 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) [2022-11-26 00:40:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-26 00:40:28,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:28,019 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-26 00:40:28,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1135, now seen corresponding path program 1 times [2022-11-26 00:40:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:28,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325045695] [2022-11-26 00:40:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:28,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325045695] [2022-11-26 00:40:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325045695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:28,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:28,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-26 00:40:28,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47754236] [2022-11-26 00:40:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:28,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:40:28,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:40:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:40:28,262 INFO L87 Difference]: Start difference. First operand has 24038 states, 19081 states have (on average 4.065300560767255) internal successors, (77570), 24037 states have internal predecessors, (77570), 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, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-26 00:40:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:28,869 INFO L93 Difference]: Finished difference Result 19244 states and 60216 transitions. [2022-11-26 00:40:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:40:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-26 00:40:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:29,059 INFO L225 Difference]: With dead ends: 19244 [2022-11-26 00:40:29,060 INFO L226 Difference]: Without dead ends: 19244 [2022-11-26 00:40:29,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:40:29,064 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:29,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:40:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-11-26 00:40:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 19244. [2022-11-26 00:40:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19244 states, 16066 states have (on average 3.748039337731856) internal successors, (60216), 19243 states have internal predecessors, (60216), 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) [2022-11-26 00:40:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19244 states to 19244 states and 60216 transitions. [2022-11-26 00:40:30,308 INFO L78 Accepts]: Start accepts. Automaton has 19244 states and 60216 transitions. Word has length 1 [2022-11-26 00:40:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:30,310 INFO L495 AbstractCegarLoop]: Abstraction has 19244 states and 60216 transitions. [2022-11-26 00:40:30,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-26 00:40:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 19244 states and 60216 transitions. [2022-11-26 00:40:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:40:30,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:30,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:40:30,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:40:30,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1123942, now seen corresponding path program 1 times [2022-11-26 00:40:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370123973] [2022-11-26 00:40:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:30,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:30,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370123973] [2022-11-26 00:40:30,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370123973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:30,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:30,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:40:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898446633] [2022-11-26 00:40:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:40:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:40:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:30,830 INFO L87 Difference]: Start difference. First operand 19244 states and 60216 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-26 00:40:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:31,639 INFO L93 Difference]: Finished difference Result 19782 states and 61358 transitions. [2022-11-26 00:40:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-26 00:40:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:31,865 INFO L225 Difference]: With dead ends: 19782 [2022-11-26 00:40:31,865 INFO L226 Difference]: Without dead ends: 19782 [2022-11-26 00:40:31,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:31,868 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:31,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 33 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:40:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2022-11-26 00:40:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 19452. [2022-11-26 00:40:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19452 states, 16289 states have (on average 3.7456565780588127) internal successors, (61013), 19451 states have internal predecessors, (61013), 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) [2022-11-26 00:40:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19452 states to 19452 states and 61013 transitions. [2022-11-26 00:40:33,287 INFO L78 Accepts]: Start accepts. Automaton has 19452 states and 61013 transitions. Word has length 3 [2022-11-26 00:40:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:33,288 INFO L495 AbstractCegarLoop]: Abstraction has 19452 states and 61013 transitions. [2022-11-26 00:40:33,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-26 00:40:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 19452 states and 61013 transitions. [2022-11-26 00:40:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:40:33,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:33,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:40:33,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:40:33,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1123943, now seen corresponding path program 1 times [2022-11-26 00:40:33,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:33,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059072121] [2022-11-26 00:40:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:33,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059072121] [2022-11-26 00:40:33,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059072121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:33,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:33,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:40:33,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031773702] [2022-11-26 00:40:33,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:33,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:40:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:40:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:40:33,614 INFO L87 Difference]: Start difference. First operand 19452 states and 61013 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-11-26 00:40:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:34,346 INFO L93 Difference]: Finished difference Result 19451 states and 61011 transitions. [2022-11-26 00:40:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2022-11-26 00:40:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:34,497 INFO L225 Difference]: With dead ends: 19451 [2022-11-26 00:40:34,497 INFO L226 Difference]: Without dead ends: 19451 [2022-11-26 00:40:34,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:40:34,499 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:34,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:40:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2022-11-26 00:40:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 19451. [2022-11-26 00:40:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19451 states, 16288 states have (on average 3.7457637524557956) internal successors, (61011), 19450 states have internal predecessors, (61011), 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) [2022-11-26 00:40:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19451 states to 19451 states and 61011 transitions. [2022-11-26 00:40:35,414 INFO L78 Accepts]: Start accepts. Automaton has 19451 states and 61011 transitions. Word has length 3 [2022-11-26 00:40:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:35,414 INFO L495 AbstractCegarLoop]: Abstraction has 19451 states and 61011 transitions. [2022-11-26 00:40:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-11-26 00:40:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 19451 states and 61011 transitions. [2022-11-26 00:40:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:40:35,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:35,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:40:35,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:40:35,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 34842953, now seen corresponding path program 1 times [2022-11-26 00:40:35,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839890390] [2022-11-26 00:40:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:35,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:35,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839890390] [2022-11-26 00:40:35,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839890390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:35,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:35,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307227320] [2022-11-26 00:40:35,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:35,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:40:35,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:40:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:40:35,941 INFO L87 Difference]: Start difference. First operand 19451 states and 61011 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-26 00:40:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:36,685 INFO L93 Difference]: Finished difference Result 19394 states and 60872 transitions. [2022-11-26 00:40:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:40:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2022-11-26 00:40:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:36,845 INFO L225 Difference]: With dead ends: 19394 [2022-11-26 00:40:36,845 INFO L226 Difference]: Without dead ends: 19394 [2022-11-26 00:40:36,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:40:36,849 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 143 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:36,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 63 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:40:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19394 states. [2022-11-26 00:40:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19394 to 19394. [2022-11-26 00:40:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19394 states, 16260 states have (on average 3.7436654366543665) internal successors, (60872), 19393 states have internal predecessors, (60872), 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) [2022-11-26 00:40:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19394 states to 19394 states and 60872 transitions. [2022-11-26 00:40:37,716 INFO L78 Accepts]: Start accepts. Automaton has 19394 states and 60872 transitions. Word has length 4 [2022-11-26 00:40:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:37,716 INFO L495 AbstractCegarLoop]: Abstraction has 19394 states and 60872 transitions. [2022-11-26 00:40:37,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-26 00:40:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19394 states and 60872 transitions. [2022-11-26 00:40:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:40:37,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:37,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:40:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:40:37,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash -875586760, now seen corresponding path program 1 times [2022-11-26 00:40:37,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:37,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937842369] [2022-11-26 00:40:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:37,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:37,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:37,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937842369] [2022-11-26 00:40:37,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937842369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:37,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:37,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:40:37,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179739743] [2022-11-26 00:40:37,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:37,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:40:37,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:37,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:40:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:40:37,755 INFO L87 Difference]: Start difference. First operand 19394 states and 60872 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-26 00:40:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:38,383 INFO L93 Difference]: Finished difference Result 35410 states and 111430 transitions. [2022-11-26 00:40:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:40:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-26 00:40:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:38,620 INFO L225 Difference]: With dead ends: 35410 [2022-11-26 00:40:38,620 INFO L226 Difference]: Without dead ends: 35410 [2022-11-26 00:40:38,621 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:40:38,621 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 81 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:38,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 102 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:40:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35410 states. [2022-11-26 00:40:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35410 to 20208. [2022-11-26 00:40:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20208 states, 17074 states have (on average 3.7116668618952793) internal successors, (63373), 20207 states have internal predecessors, (63373), 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) [2022-11-26 00:40:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20208 states to 20208 states and 63373 transitions. [2022-11-26 00:40:39,818 INFO L78 Accepts]: Start accepts. Automaton has 20208 states and 63373 transitions. Word has length 6 [2022-11-26 00:40:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:39,819 INFO L495 AbstractCegarLoop]: Abstraction has 20208 states and 63373 transitions. [2022-11-26 00:40:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-26 00:40:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20208 states and 63373 transitions. [2022-11-26 00:40:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:40:39,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:39,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:39,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:40:39,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:39,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1373384667, now seen corresponding path program 1 times [2022-11-26 00:40:39,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:39,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120076989] [2022-11-26 00:40:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:39,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:39,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120076989] [2022-11-26 00:40:39,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120076989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:39,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:39,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741352980] [2022-11-26 00:40:39,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:40:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:40:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:40:39,984 INFO L87 Difference]: Start difference. First operand 20208 states and 63373 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-26 00:40:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:40,982 INFO L93 Difference]: Finished difference Result 16051 states and 49788 transitions. [2022-11-26 00:40:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:40:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-26 00:40:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:41,055 INFO L225 Difference]: With dead ends: 16051 [2022-11-26 00:40:41,055 INFO L226 Difference]: Without dead ends: 16051 [2022-11-26 00:40:41,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:40:41,057 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 268 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:41,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 126 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:40:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16051 states. [2022-11-26 00:40:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16051 to 15742. [2022-11-26 00:40:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15742 states, 13778 states have (on average 3.577297140368704) internal successors, (49288), 15741 states have internal predecessors, (49288), 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) [2022-11-26 00:40:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15742 states to 15742 states and 49288 transitions. [2022-11-26 00:40:41,810 INFO L78 Accepts]: Start accepts. Automaton has 15742 states and 49288 transitions. Word has length 7 [2022-11-26 00:40:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:41,811 INFO L495 AbstractCegarLoop]: Abstraction has 15742 states and 49288 transitions. [2022-11-26 00:40:41,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-26 00:40:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 15742 states and 49288 transitions. [2022-11-26 00:40:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:40:41,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:41,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:41,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:40:41,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1373384666, now seen corresponding path program 1 times [2022-11-26 00:40:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237208014] [2022-11-26 00:40:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:41,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:42,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237208014] [2022-11-26 00:40:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237208014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:42,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:42,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:40:42,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468939637] [2022-11-26 00:40:42,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:40:42,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:40:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:40:42,045 INFO L87 Difference]: Start difference. First operand 15742 states and 49288 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-26 00:40:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:42,606 INFO L93 Difference]: Finished difference Result 15632 states and 48953 transitions. [2022-11-26 00:40:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:40:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-26 00:40:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:42,686 INFO L225 Difference]: With dead ends: 15632 [2022-11-26 00:40:42,686 INFO L226 Difference]: Without dead ends: 15632 [2022-11-26 00:40:42,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:40:42,688 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:40:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15632 states. [2022-11-26 00:40:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15632 to 15632. [2022-11-26 00:40:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15632 states, 13668 states have (on average 3.5815774070822357) internal successors, (48953), 15631 states have internal predecessors, (48953), 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) [2022-11-26 00:40:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 48953 transitions. [2022-11-26 00:40:43,464 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 48953 transitions. Word has length 7 [2022-11-26 00:40:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:43,465 INFO L495 AbstractCegarLoop]: Abstraction has 15632 states and 48953 transitions. [2022-11-26 00:40:43,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-26 00:40:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 48953 transitions. [2022-11-26 00:40:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:40:43,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:43,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:43,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:40:43,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting writer_fnErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1373487387, now seen corresponding path program 1 times [2022-11-26 00:40:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827680619] [2022-11-26 00:40:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:43,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:43,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827680619] [2022-11-26 00:40:43,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827680619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:43,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:43,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:40:43,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096519598] [2022-11-26 00:40:43,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:43,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:40:43,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:43,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:40:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:40:43,581 INFO L87 Difference]: Start difference. First operand 15632 states and 48953 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-26 00:40:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:44,527 INFO L93 Difference]: Finished difference Result 13490 states and 41803 transitions. [2022-11-26 00:40:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:40:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2022-11-26 00:40:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:44,596 INFO L225 Difference]: With dead ends: 13490 [2022-11-26 00:40:44,596 INFO L226 Difference]: Without dead ends: 13490 [2022-11-26 00:40:44,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:40:44,597 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 323 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:44,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 186 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:40:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2022-11-26 00:40:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 11824. [2022-11-26 00:40:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11824 states, 10670 states have (on average 3.4747891283973757) internal successors, (37076), 11823 states have internal predecessors, (37076), 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) [2022-11-26 00:40:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11824 states to 11824 states and 37076 transitions. [2022-11-26 00:40:45,031 INFO L78 Accepts]: Start accepts. Automaton has 11824 states and 37076 transitions. Word has length 7 [2022-11-26 00:40:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:45,031 INFO L495 AbstractCegarLoop]: Abstraction has 11824 states and 37076 transitions. [2022-11-26 00:40:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-26 00:40:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11824 states and 37076 transitions. [2022-11-26 00:40:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:40:45,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:45,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:45,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:40:45,034 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting writer_fnErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1373487386, now seen corresponding path program 1 times [2022-11-26 00:40:45,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:45,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344112879] [2022-11-26 00:40:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:45,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:45,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344112879] [2022-11-26 00:40:45,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344112879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:45,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:45,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:40:45,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527962111] [2022-11-26 00:40:45,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:45,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:40:45,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:40:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:40:45,229 INFO L87 Difference]: Start difference. First operand 11824 states and 37076 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-26 00:40:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:45,990 INFO L93 Difference]: Finished difference Result 11782 states and 36947 transitions. [2022-11-26 00:40:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:40:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2022-11-26 00:40:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:46,025 INFO L225 Difference]: With dead ends: 11782 [2022-11-26 00:40:46,025 INFO L226 Difference]: Without dead ends: 11782 [2022-11-26 00:40:46,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:40:46,026 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:46,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 109 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:40:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11782 states. [2022-11-26 00:40:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11782 to 11754. [2022-11-26 00:40:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11754 states, 10600 states have (on average 3.477452830188679) internal successors, (36861), 11753 states have internal predecessors, (36861), 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) [2022-11-26 00:40:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11754 states to 11754 states and 36861 transitions. [2022-11-26 00:40:46,324 INFO L78 Accepts]: Start accepts. Automaton has 11754 states and 36861 transitions. Word has length 7 [2022-11-26 00:40:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:46,325 INFO L495 AbstractCegarLoop]: Abstraction has 11754 states and 36861 transitions. [2022-11-26 00:40:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-26 00:40:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11754 states and 36861 transitions. [2022-11-26 00:40:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:40:46,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:46,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:46,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:40:46,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash 374719424, now seen corresponding path program 1 times [2022-11-26 00:40:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753061460] [2022-11-26 00:40:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:46,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:46,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753061460] [2022-11-26 00:40:46,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753061460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:46,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:46,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:40:46,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135255667] [2022-11-26 00:40:46,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:46,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:40:46,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:40:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:40:46,607 INFO L87 Difference]: Start difference. First operand 11754 states and 36861 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-11-26 00:40:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:47,557 INFO L93 Difference]: Finished difference Result 19686 states and 61317 transitions. [2022-11-26 00:40:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:40:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2022-11-26 00:40:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:47,650 INFO L225 Difference]: With dead ends: 19686 [2022-11-26 00:40:47,650 INFO L226 Difference]: Without dead ends: 19686 [2022-11-26 00:40:47,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:40:47,651 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 438 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:47,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 91 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:40:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19686 states. [2022-11-26 00:40:48,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19686 to 15634. [2022-11-26 00:40:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15634 states, 14480 states have (on average 3.4707872928176795) internal successors, (50257), 15633 states have internal predecessors, (50257), 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) [2022-11-26 00:40:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15634 states to 15634 states and 50257 transitions. [2022-11-26 00:40:48,222 INFO L78 Accepts]: Start accepts. Automaton has 15634 states and 50257 transitions. Word has length 8 [2022-11-26 00:40:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:48,223 INFO L495 AbstractCegarLoop]: Abstraction has 15634 states and 50257 transitions. [2022-11-26 00:40:48,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-11-26 00:40:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 15634 states and 50257 transitions. [2022-11-26 00:40:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:40:48,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:48,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:48,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:40:48,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash 374765924, now seen corresponding path program 2 times [2022-11-26 00:40:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591270762] [2022-11-26 00:40:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:48,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:48,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591270762] [2022-11-26 00:40:48,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591270762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:48,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:48,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:40:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311689888] [2022-11-26 00:40:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:48,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:40:48,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:40:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:40:48,437 INFO L87 Difference]: Start difference. First operand 15634 states and 50257 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-11-26 00:40:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:49,357 INFO L93 Difference]: Finished difference Result 13645 states and 43075 transitions. [2022-11-26 00:40:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:40:49,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2022-11-26 00:40:49,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:49,428 INFO L225 Difference]: With dead ends: 13645 [2022-11-26 00:40:49,429 INFO L226 Difference]: Without dead ends: 13645 [2022-11-26 00:40:49,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:40:49,430 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 342 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 77 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:40:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13645 states. [2022-11-26 00:40:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13645 to 9314. [2022-11-26 00:40:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9314 states, 8685 states have (on average 3.3375935521013242) internal successors, (28987), 9313 states have internal predecessors, (28987), 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) [2022-11-26 00:40:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9314 states to 9314 states and 28987 transitions. [2022-11-26 00:40:49,722 INFO L78 Accepts]: Start accepts. Automaton has 9314 states and 28987 transitions. Word has length 8 [2022-11-26 00:40:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:49,723 INFO L495 AbstractCegarLoop]: Abstraction has 9314 states and 28987 transitions. [2022-11-26 00:40:49,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-11-26 00:40:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 9314 states and 28987 transitions. [2022-11-26 00:40:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:40:49,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:49,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:49,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:40:49,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting writer_fnErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 371571884, now seen corresponding path program 1 times [2022-11-26 00:40:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:49,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311177285] [2022-11-26 00:40:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:49,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:49,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:49,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311177285] [2022-11-26 00:40:49,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311177285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:49,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:49,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:40:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989786919] [2022-11-26 00:40:49,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:49,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:40:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:40:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:40:49,985 INFO L87 Difference]: Start difference. First operand 9314 states and 28987 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2022-11-26 00:40:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:51,164 INFO L93 Difference]: Finished difference Result 8621 states and 25957 transitions. [2022-11-26 00:40:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:40:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 8 [2022-11-26 00:40:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:51,187 INFO L225 Difference]: With dead ends: 8621 [2022-11-26 00:40:51,187 INFO L226 Difference]: Without dead ends: 8621 [2022-11-26 00:40:51,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:40:51,188 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 318 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:51,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 145 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:40:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8621 states. [2022-11-26 00:40:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8621 to 7242. [2022-11-26 00:40:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 6913 states have (on average 3.1981773470273396) internal successors, (22109), 7241 states have internal predecessors, (22109), 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) [2022-11-26 00:40:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 22109 transitions. [2022-11-26 00:40:51,339 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 22109 transitions. Word has length 8 [2022-11-26 00:40:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:51,339 INFO L495 AbstractCegarLoop]: Abstraction has 7242 states and 22109 transitions. [2022-11-26 00:40:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2022-11-26 00:40:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 22109 transitions. [2022-11-26 00:40:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:40:51,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:51,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:51,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:40:51,341 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash -643149953, now seen corresponding path program 1 times [2022-11-26 00:40:51,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:51,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944509602] [2022-11-26 00:40:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:51,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:51,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944509602] [2022-11-26 00:40:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944509602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:51,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:51,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:40:51,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105265286] [2022-11-26 00:40:51,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:51,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:40:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:40:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:40:51,845 INFO L87 Difference]: Start difference. First operand 7242 states and 22109 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-11-26 00:40:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:53,219 INFO L93 Difference]: Finished difference Result 10112 states and 31095 transitions. [2022-11-26 00:40:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:40:53,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 10 [2022-11-26 00:40:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:53,251 INFO L225 Difference]: With dead ends: 10112 [2022-11-26 00:40:53,251 INFO L226 Difference]: Without dead ends: 10112 [2022-11-26 00:40:53,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:40:53,252 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 382 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:53,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 229 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:40:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2022-11-26 00:40:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 9065. [2022-11-26 00:40:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9065 states, 8736 states have (on average 3.2109661172161172) internal successors, (28051), 9064 states have internal predecessors, (28051), 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) [2022-11-26 00:40:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 28051 transitions. [2022-11-26 00:40:53,453 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 28051 transitions. Word has length 10 [2022-11-26 00:40:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:53,453 INFO L495 AbstractCegarLoop]: Abstraction has 9065 states and 28051 transitions. [2022-11-26 00:40:53,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-11-26 00:40:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 28051 transitions. [2022-11-26 00:40:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:40:53,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:53,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:53,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:40:53,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash 591629826, now seen corresponding path program 1 times [2022-11-26 00:40:53,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:53,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696464442] [2022-11-26 00:40:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:53,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:54,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:54,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696464442] [2022-11-26 00:40:54,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696464442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:54,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:54,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:40:54,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626718984] [2022-11-26 00:40:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:54,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:40:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:40:54,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:40:54,086 INFO L87 Difference]: Start difference. First operand 9065 states and 28051 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-11-26 00:40:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:56,164 INFO L93 Difference]: Finished difference Result 10859 states and 33410 transitions. [2022-11-26 00:40:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:40:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 10 [2022-11-26 00:40:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:56,203 INFO L225 Difference]: With dead ends: 10859 [2022-11-26 00:40:56,203 INFO L226 Difference]: Without dead ends: 10859 [2022-11-26 00:40:56,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:40:56,204 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 434 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:56,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 251 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:40:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2022-11-26 00:40:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10216. [2022-11-26 00:40:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 9887 states have (on average 3.209163548093456) internal successors, (31729), 10215 states have internal predecessors, (31729), 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) [2022-11-26 00:40:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 31729 transitions. [2022-11-26 00:40:56,521 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 31729 transitions. Word has length 10 [2022-11-26 00:40:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:56,521 INFO L495 AbstractCegarLoop]: Abstraction has 10216 states and 31729 transitions. [2022-11-26 00:40:56,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-11-26 00:40:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 31729 transitions. [2022-11-26 00:40:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:40:56,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:56,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:40:56,522 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1537206387, now seen corresponding path program 1 times [2022-11-26 00:40:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:56,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179572527] [2022-11-26 00:40:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:57,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179572527] [2022-11-26 00:40:57,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179572527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:57,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:57,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:40:57,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491226349] [2022-11-26 00:40:57,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:57,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:40:57,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:57,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:40:57,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:40:57,389 INFO L87 Difference]: Start difference. First operand 10216 states and 31729 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-11-26 00:40:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:59,053 INFO L93 Difference]: Finished difference Result 12746 states and 39699 transitions. [2022-11-26 00:40:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:40:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 [2022-11-26 00:40:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:59,093 INFO L225 Difference]: With dead ends: 12746 [2022-11-26 00:40:59,093 INFO L226 Difference]: Without dead ends: 12746 [2022-11-26 00:40:59,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:40:59,095 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 348 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:59,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 144 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:40:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2022-11-26 00:40:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 9970. [2022-11-26 00:40:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9641 states have (on average 3.198319676382118) internal successors, (30835), 9969 states have internal predecessors, (30835), 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) [2022-11-26 00:40:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 30835 transitions. [2022-11-26 00:40:59,451 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 30835 transitions. Word has length 11 [2022-11-26 00:40:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:59,451 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 30835 transitions. [2022-11-26 00:40:59,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-11-26 00:40:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 30835 transitions. [2022-11-26 00:40:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:40:59,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:59,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:40:59,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:40:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1160663042, now seen corresponding path program 1 times [2022-11-26 00:40:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:59,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593781309] [2022-11-26 00:40:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:59,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:00,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593781309] [2022-11-26 00:41:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593781309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:00,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:00,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:41:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893003356] [2022-11-26 00:41:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:41:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:41:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:41:00,215 INFO L87 Difference]: Start difference. First operand 9970 states and 30835 transitions. Second operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2022-11-26 00:41:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:02,138 INFO L93 Difference]: Finished difference Result 12321 states and 38156 transitions. [2022-11-26 00:41:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:41:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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 [2022-11-26 00:41:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:02,185 INFO L225 Difference]: With dead ends: 12321 [2022-11-26 00:41:02,185 INFO L226 Difference]: Without dead ends: 12321 [2022-11-26 00:41:02,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:41:02,186 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 451 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:02,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 136 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:41:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2022-11-26 00:41:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 9722. [2022-11-26 00:41:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9722 states, 9393 states have (on average 3.191951453209837) internal successors, (29982), 9721 states have internal predecessors, (29982), 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) [2022-11-26 00:41:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9722 states to 9722 states and 29982 transitions. [2022-11-26 00:41:02,418 INFO L78 Accepts]: Start accepts. Automaton has 9722 states and 29982 transitions. Word has length 11 [2022-11-26 00:41:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:02,418 INFO L495 AbstractCegarLoop]: Abstraction has 9722 states and 29982 transitions. [2022-11-26 00:41:02,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2022-11-26 00:41:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 9722 states and 29982 transitions. [2022-11-26 00:41:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:41:02,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:02,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:02,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:41:02,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash -812060561, now seen corresponding path program 1 times [2022-11-26 00:41:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:02,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463468260] [2022-11-26 00:41:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:02,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463468260] [2022-11-26 00:41:02,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463468260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:02,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:02,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:41:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364335267] [2022-11-26 00:41:02,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:02,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:41:02,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:02,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:41:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:41:02,693 INFO L87 Difference]: Start difference. First operand 9722 states and 29982 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-26 00:41:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:03,132 INFO L93 Difference]: Finished difference Result 9050 states and 27855 transitions. [2022-11-26 00:41:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:41:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-11-26 00:41:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:03,173 INFO L225 Difference]: With dead ends: 9050 [2022-11-26 00:41:03,173 INFO L226 Difference]: Without dead ends: 9050 [2022-11-26 00:41:03,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:41:03,174 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:03,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 21 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:41:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2022-11-26 00:41:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 9050. [2022-11-26 00:41:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 8745 states have (on average 3.1852487135506005) internal successors, (27855), 9049 states have internal predecessors, (27855), 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) [2022-11-26 00:41:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 27855 transitions. [2022-11-26 00:41:03,447 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 27855 transitions. Word has length 13 [2022-11-26 00:41:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:03,448 INFO L495 AbstractCegarLoop]: Abstraction has 9050 states and 27855 transitions. [2022-11-26 00:41:03,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-26 00:41:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 27855 transitions. [2022-11-26 00:41:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:41:03,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:03,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:03,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:41:03,451 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash -812060560, now seen corresponding path program 1 times [2022-11-26 00:41:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:03,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426549759] [2022-11-26 00:41:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:03,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:03,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426549759] [2022-11-26 00:41:03,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426549759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:03,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:03,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:41:03,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190381303] [2022-11-26 00:41:03,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:03,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:41:03,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:41:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:41:03,568 INFO L87 Difference]: Start difference. First operand 9050 states and 27855 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-26 00:41:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:03,906 INFO L93 Difference]: Finished difference Result 8602 states and 26437 transitions. [2022-11-26 00:41:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:41:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-11-26 00:41:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:03,945 INFO L225 Difference]: With dead ends: 8602 [2022-11-26 00:41:03,946 INFO L226 Difference]: Without dead ends: 8602 [2022-11-26 00:41:03,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:41:03,947 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 169 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 71 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:41:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2022-11-26 00:41:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 8602. [2022-11-26 00:41:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 8313 states have (on average 3.180199687236858) internal successors, (26437), 8601 states have internal predecessors, (26437), 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) [2022-11-26 00:41:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 26437 transitions. [2022-11-26 00:41:04,185 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 26437 transitions. Word has length 13 [2022-11-26 00:41:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:04,187 INFO L495 AbstractCegarLoop]: Abstraction has 8602 states and 26437 transitions. [2022-11-26 00:41:04,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-26 00:41:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 26437 transitions. [2022-11-26 00:41:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:41:04,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:04,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:41:04,191 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:04,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1840336517, now seen corresponding path program 1 times [2022-11-26 00:41:04,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:04,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417040919] [2022-11-26 00:41:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:04,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:04,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417040919] [2022-11-26 00:41:04,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417040919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625579566] [2022-11-26 00:41:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:04,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:04,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:04,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:04,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:41:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:41:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:04,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:04,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625579566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333855130] [2022-11-26 00:41:04,593 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:41:04,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:04,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-26 00:41:04,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701785050] [2022-11-26 00:41:04,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:04,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:41:04,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:41:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:41:04,600 INFO L87 Difference]: Start difference. First operand 8602 states and 26437 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-11-26 00:41:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:05,318 INFO L93 Difference]: Finished difference Result 22644 states and 69167 transitions. [2022-11-26 00:41:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:41:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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 [2022-11-26 00:41:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:05,435 INFO L225 Difference]: With dead ends: 22644 [2022-11-26 00:41:05,435 INFO L226 Difference]: Without dead ends: 22644 [2022-11-26 00:41:05,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:41:05,436 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 359 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:05,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 288 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:41:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22644 states. [2022-11-26 00:41:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22644 to 20250. [2022-11-26 00:41:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20250 states, 19961 states have (on average 3.2676218626321325) internal successors, (65225), 20249 states have internal predecessors, (65225), 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) [2022-11-26 00:41:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20250 states to 20250 states and 65225 transitions. [2022-11-26 00:41:06,153 INFO L78 Accepts]: Start accepts. Automaton has 20250 states and 65225 transitions. Word has length 14 [2022-11-26 00:41:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:06,153 INFO L495 AbstractCegarLoop]: Abstraction has 20250 states and 65225 transitions. [2022-11-26 00:41:06,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-11-26 00:41:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20250 states and 65225 transitions. [2022-11-26 00:41:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:41:06,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:06,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:06,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:06,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash 595926515, now seen corresponding path program 1 times [2022-11-26 00:41:06,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:06,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246910710] [2022-11-26 00:41:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:06,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246910710] [2022-11-26 00:41:06,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246910710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:06,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:06,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:41:06,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723371292] [2022-11-26 00:41:06,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:06,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:41:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:41:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:41:06,424 INFO L87 Difference]: Start difference. First operand 20250 states and 65225 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) 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) [2022-11-26 00:41:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:06,943 INFO L93 Difference]: Finished difference Result 29288 states and 96002 transitions. [2022-11-26 00:41:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:41:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) 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 [2022-11-26 00:41:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:07,131 INFO L225 Difference]: With dead ends: 29288 [2022-11-26 00:41:07,132 INFO L226 Difference]: Without dead ends: 29288 [2022-11-26 00:41:07,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:41:07,133 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:07,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 78 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:41:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29288 states. [2022-11-26 00:41:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29288 to 20918. [2022-11-26 00:41:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20918 states, 20629 states have (on average 3.311648649958796) internal successors, (68316), 20917 states have internal predecessors, (68316), 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) [2022-11-26 00:41:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20918 states to 20918 states and 68316 transitions. [2022-11-26 00:41:08,005 INFO L78 Accepts]: Start accepts. Automaton has 20918 states and 68316 transitions. Word has length 14 [2022-11-26 00:41:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:08,006 INFO L495 AbstractCegarLoop]: Abstraction has 20918 states and 68316 transitions. [2022-11-26 00:41:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) 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) [2022-11-26 00:41:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20918 states and 68316 transitions. [2022-11-26 00:41:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:41:08,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:08,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:08,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:41:08,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1293901999, now seen corresponding path program 1 times [2022-11-26 00:41:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907005962] [2022-11-26 00:41:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:08,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:08,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907005962] [2022-11-26 00:41:08,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907005962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:08,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:08,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:41:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271871422] [2022-11-26 00:41:08,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:41:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:41:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:41:08,559 INFO L87 Difference]: Start difference. First operand 20918 states and 68316 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-26 00:41:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:09,264 INFO L93 Difference]: Finished difference Result 20918 states and 68316 transitions. [2022-11-26 00:41:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:41:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 15 [2022-11-26 00:41:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:09,374 INFO L225 Difference]: With dead ends: 20918 [2022-11-26 00:41:09,374 INFO L226 Difference]: Without dead ends: 20918 [2022-11-26 00:41:09,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:41:09,375 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:09,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 120 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:41:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2022-11-26 00:41:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 20917. [2022-11-26 00:41:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20917 states, 20628 states have (on average 3.3117122357960054) internal successors, (68314), 20916 states have internal predecessors, (68314), 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) [2022-11-26 00:41:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20917 states to 20917 states and 68314 transitions. [2022-11-26 00:41:09,999 INFO L78 Accepts]: Start accepts. Automaton has 20917 states and 68314 transitions. Word has length 15 [2022-11-26 00:41:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:10,000 INFO L495 AbstractCegarLoop]: Abstraction has 20917 states and 68314 transitions. [2022-11-26 00:41:10,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-26 00:41:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20917 states and 68314 transitions. [2022-11-26 00:41:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:41:10,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:10,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:10,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:41:10,004 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1188295912, now seen corresponding path program 1 times [2022-11-26 00:41:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069275044] [2022-11-26 00:41:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:10,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:10,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069275044] [2022-11-26 00:41:10,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069275044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:10,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:10,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:41:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900875731] [2022-11-26 00:41:10,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:10,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:41:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:10,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:41:10,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:41:10,129 INFO L87 Difference]: Start difference. First operand 20917 states and 68314 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-11-26 00:41:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:10,406 INFO L93 Difference]: Finished difference Result 7779 states and 21748 transitions. [2022-11-26 00:41:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:41:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2022-11-26 00:41:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:10,436 INFO L225 Difference]: With dead ends: 7779 [2022-11-26 00:41:10,436 INFO L226 Difference]: Without dead ends: 7779 [2022-11-26 00:41:10,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:41:10,443 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:10,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 57 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:41:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7779 states. [2022-11-26 00:41:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7779 to 7545. [2022-11-26 00:41:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7388 states have (on average 2.9137791012452627) internal successors, (21527), 7544 states have internal predecessors, (21527), 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) [2022-11-26 00:41:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 21527 transitions. [2022-11-26 00:41:10,636 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 21527 transitions. Word has length 16 [2022-11-26 00:41:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:10,636 INFO L495 AbstractCegarLoop]: Abstraction has 7545 states and 21527 transitions. [2022-11-26 00:41:10,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-11-26 00:41:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 21527 transitions. [2022-11-26 00:41:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:41:10,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:10,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:10,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:41:10,639 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2079789687, now seen corresponding path program 1 times [2022-11-26 00:41:10,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:10,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295467421] [2022-11-26 00:41:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:11,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295467421] [2022-11-26 00:41:11,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295467421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:11,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:11,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:41:11,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392709324] [2022-11-26 00:41:11,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:11,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:41:11,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:41:11,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:41:11,218 INFO L87 Difference]: Start difference. First operand 7545 states and 21527 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-26 00:41:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:11,981 INFO L93 Difference]: Finished difference Result 8035 states and 23071 transitions. [2022-11-26 00:41:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:41:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 16 [2022-11-26 00:41:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:12,008 INFO L225 Difference]: With dead ends: 8035 [2022-11-26 00:41:12,008 INFO L226 Difference]: Without dead ends: 8035 [2022-11-26 00:41:12,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:41:12,009 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 203 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:12,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 116 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:41:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2022-11-26 00:41:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 7869. [2022-11-26 00:41:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7869 states, 7712 states have (on average 2.9146784232365146) internal successors, (22478), 7868 states have internal predecessors, (22478), 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) [2022-11-26 00:41:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 22478 transitions. [2022-11-26 00:41:12,220 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 22478 transitions. Word has length 16 [2022-11-26 00:41:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:12,221 INFO L495 AbstractCegarLoop]: Abstraction has 7869 states and 22478 transitions. [2022-11-26 00:41:12,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-26 00:41:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 22478 transitions. [2022-11-26 00:41:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:41:12,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:12,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 00:41:12,224 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -382544743, now seen corresponding path program 2 times [2022-11-26 00:41:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:12,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716257185] [2022-11-26 00:41:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:12,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716257185] [2022-11-26 00:41:12,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716257185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:12,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:12,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:41:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805439145] [2022-11-26 00:41:12,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:12,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:41:12,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:41:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:41:12,910 INFO L87 Difference]: Start difference. First operand 7869 states and 22478 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-26 00:41:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:13,820 INFO L93 Difference]: Finished difference Result 8089 states and 23225 transitions. [2022-11-26 00:41:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:41:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 16 [2022-11-26 00:41:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:13,862 INFO L225 Difference]: With dead ends: 8089 [2022-11-26 00:41:13,862 INFO L226 Difference]: Without dead ends: 8089 [2022-11-26 00:41:13,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:41:13,864 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 176 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:13,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 116 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:41:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8089 states. [2022-11-26 00:41:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8089 to 7572. [2022-11-26 00:41:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7572 states, 7415 states have (on average 2.913553607552259) internal successors, (21604), 7571 states have internal predecessors, (21604), 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) [2022-11-26 00:41:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7572 states to 7572 states and 21604 transitions. [2022-11-26 00:41:14,157 INFO L78 Accepts]: Start accepts. Automaton has 7572 states and 21604 transitions. Word has length 16 [2022-11-26 00:41:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:14,157 INFO L495 AbstractCegarLoop]: Abstraction has 7572 states and 21604 transitions. [2022-11-26 00:41:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-26 00:41:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7572 states and 21604 transitions. [2022-11-26 00:41:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:41:14,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:14,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:14,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:41:14,161 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:14,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1456256853, now seen corresponding path program 3 times [2022-11-26 00:41:14,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:14,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592528109] [2022-11-26 00:41:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:14,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:14,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592528109] [2022-11-26 00:41:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592528109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:14,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:41:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836041280] [2022-11-26 00:41:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:41:14,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:41:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:41:14,694 INFO L87 Difference]: Start difference. First operand 7572 states and 21604 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-26 00:41:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:15,447 INFO L93 Difference]: Finished difference Result 7603 states and 21704 transitions. [2022-11-26 00:41:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:41:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 16 [2022-11-26 00:41:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:15,482 INFO L225 Difference]: With dead ends: 7603 [2022-11-26 00:41:15,483 INFO L226 Difference]: Without dead ends: 7603 [2022-11-26 00:41:15,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:41:15,491 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:15,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 116 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:41:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7603 states. [2022-11-26 00:41:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7603 to 7528. [2022-11-26 00:41:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7528 states, 7371 states have (on average 2.9135802469135803) internal successors, (21476), 7527 states have internal predecessors, (21476), 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) [2022-11-26 00:41:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 21476 transitions. [2022-11-26 00:41:15,763 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 21476 transitions. Word has length 16 [2022-11-26 00:41:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:15,764 INFO L495 AbstractCegarLoop]: Abstraction has 7528 states and 21476 transitions. [2022-11-26 00:41:15,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-26 00:41:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 21476 transitions. [2022-11-26 00:41:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:41:15,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:15,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:41:15,769 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting reader_twoErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1456257370, now seen corresponding path program 1 times [2022-11-26 00:41:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:15,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029866284] [2022-11-26 00:41:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:15,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:15,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:15,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029866284] [2022-11-26 00:41:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029866284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:15,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:15,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:41:15,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264782703] [2022-11-26 00:41:15,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:15,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:41:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:15,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:41:15,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:41:15,847 INFO L87 Difference]: Start difference. First operand 7528 states and 21476 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-11-26 00:41:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:16,142 INFO L93 Difference]: Finished difference Result 7492 states and 21550 transitions. [2022-11-26 00:41:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:41:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2022-11-26 00:41:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:16,174 INFO L225 Difference]: With dead ends: 7492 [2022-11-26 00:41:16,175 INFO L226 Difference]: Without dead ends: 7492 [2022-11-26 00:41:16,176 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:41:16,177 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:16,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 39 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:41:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-11-26 00:41:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 7315. [2022-11-26 00:41:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7166 states have (on average 2.913340775886129) internal successors, (20877), 7314 states have internal predecessors, (20877), 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) [2022-11-26 00:41:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 20877 transitions. [2022-11-26 00:41:16,410 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 20877 transitions. Word has length 16 [2022-11-26 00:41:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:16,411 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 20877 transitions. [2022-11-26 00:41:16,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-11-26 00:41:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 20877 transitions. [2022-11-26 00:41:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:41:16,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:16,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:16,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:41:16,415 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-26 00:41:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2118675380, now seen corresponding path program 1 times [2022-11-26 00:41:16,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:16,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088720791] [2022-11-26 00:41:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:16,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:17,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088720791] [2022-11-26 00:41:17,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088720791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991472238] [2022-11-26 00:41:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:17,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:17,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:17,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6472a48-3d57-4d04-877b-5e42a4a42874/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:41:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:17,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-26 00:41:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:17,920 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-26 00:41:17,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 27 [2022-11-26 00:41:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:17,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-26 00:41:17,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-26 00:41:18,103 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-26 00:41:18,398 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:41:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:18,673 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:41:18,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2022-11-26 00:41:18,884 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-11-26 00:41:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:19,176 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-11-26 00:41:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:19,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:19,376 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 36 [2022-11-26 00:41:49,873 WARN L233 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:57,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991472238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:57,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240600219] [2022-11-26 00:41:57,729 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:41:57,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 39 [2022-11-26 00:41:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181845071] [2022-11-26 00:41:57,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:57,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 00:41:57,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:57,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 00:41:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1434, Unknown=8, NotChecked=0, Total=1640 [2022-11-26 00:41:57,736 INFO L87 Difference]: Start difference. First operand 7315 states and 20877 transitions. Second operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 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) [2022-11-26 00:42:19,783 WARN L233 SmtUtils]: Spent 18.55s on a formula simplification. DAG size of input: 210 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:36,488 WARN L233 SmtUtils]: Spent 16.10s on a formula simplification. DAG size of input: 201 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:54,506 WARN L233 SmtUtils]: Spent 16.52s on a formula simplification. DAG size of input: 196 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:10,221 WARN L233 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 209 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:30,921 WARN L233 SmtUtils]: Spent 16.98s on a formula simplification. DAG size of input: 236 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:33,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:43:35,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]