./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS --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 adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 --- 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-8393723 [2022-11-19 07:56:13,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:56:13,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:56:13,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:56:13,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:56:13,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:56:13,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:56:13,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:56:13,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:56:13,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:56:13,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:56:13,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:56:13,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:56:13,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:56:13,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:56:13,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:56:13,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:56:13,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:56:13,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:56:13,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:56:13,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:56:13,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:56:13,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:56:13,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:56:13,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:56:13,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:56:13,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:56:13,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:56:13,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:56:13,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:56:13,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:56:13,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:56:13,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:56:13,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:56:13,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:56:13,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:56:13,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:56:13,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:56:13,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:56:13,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:56:13,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:56:13,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:56:13,339 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:56:13,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:56:13,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:56:13,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:56:13,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:56:13,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:56:13,341 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:56:13,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:56:13,342 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:56:13,342 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:56:13,342 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:56:13,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:56:13,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:56:13,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:56:13,343 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:56:13,343 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:56:13,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:56:13,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:56:13,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:56:13,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:56:13,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:56:13,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:56:13,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:56:13,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:56:13,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:56:13,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:56:13,346 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:56:13,346 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:56:13,346 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:56:13,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:56:13,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:56:13,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:56:13,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:56:13,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:56:13,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:56:13,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:13,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:56:13,348 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:56:13,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:56:13,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:56:13,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:56:13,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:56:13,349 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 [2022-11-19 07:56:13,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:56:13,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:56:13,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:56:13,652 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:56:13,653 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:56:13,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-11-19 07:56:13,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/data/81782b043/9c4d4b61194849899482afe9f2298038/FLAG0aa987d0f [2022-11-19 07:56:14,262 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:56:14,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-11-19 07:56:14,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/data/81782b043/9c4d4b61194849899482afe9f2298038/FLAG0aa987d0f [2022-11-19 07:56:14,572 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/data/81782b043/9c4d4b61194849899482afe9f2298038 [2022-11-19 07:56:14,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:56:14,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:56:14,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:14,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:56:14,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:56:14,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:14" (1/1) ... [2022-11-19 07:56:14,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dbcdf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:14, skipping insertion in model container [2022-11-19 07:56:14,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:14" (1/1) ... [2022-11-19 07:56:14,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:56:14,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:56:15,060 WARN L234 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-11-19 07:56:15,073 WARN L234 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-11-19 07:56:15,076 WARN L234 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-11-19 07:56:15,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:15,098 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:56:15,161 WARN L234 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-11-19 07:56:15,169 WARN L234 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-11-19 07:56:15,171 WARN L234 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_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-11-19 07:56:15,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:15,220 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:56:15,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15 WrapperNode [2022-11-19 07:56:15,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:15,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:15,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:56:15,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:56:15,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,299 INFO L138 Inliner]: procedures = 176, calls = 34, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 141 [2022-11-19 07:56:15,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:15,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:56:15,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:56:15,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:56:15,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:56:15,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:56:15,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:56:15,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:56:15,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (1/1) ... [2022-11-19 07:56:15,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:15,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:56:15,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3f8a6-8ab5-4862-bcf7-c7e7f613d5e7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:56:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:56:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-19 07:56:15,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-19 07:56:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:56:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:56:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:56:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:56:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:56:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:56:15,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:56:15,466 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:56:15,633 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:56:15,636 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:56:16,016 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:56:16,232 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:56:16,232 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:56:16,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:16 BoogieIcfgContainer [2022-11-19 07:56:16,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:56:16,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:56:16,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:56:16,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:56:16,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:14" (1/3) ... [2022-11-19 07:56:16,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6201d435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:16, skipping insertion in model container [2022-11-19 07:56:16,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:15" (2/3) ... [2022-11-19 07:56:16,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6201d435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:16, skipping insertion in model container [2022-11-19 07:56:16,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:16" (3/3) ... [2022-11-19 07:56:16,247 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2022-11-19 07:56:16,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:56:16,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-19 07:56:16,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:56:16,435 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:56:16,475 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:56:16,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 151 transitions, 307 flow [2022-11-19 07:56:16,492 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 151 transitions, 307 flow [2022-11-19 07:56:16,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 151 transitions, 307 flow [2022-11-19 07:56:16,569 INFO L130 PetriNetUnfolder]: 14/167 cut-off events. [2022-11-19 07:56:16,570 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-19 07:56:16,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 167 events. 14/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 337 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 130. Up to 4 conditions per place. [2022-11-19 07:56:16,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 4256 [2022-11-19 07:56:27,331 INFO L134 LiptonReduction]: Checked pairs total: 5722 [2022-11-19 07:56:27,331 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-19 07:56:27,343 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 41 transitions, 87 flow [2022-11-19 07:56:27,396 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 221 states, 119 states have (on average 3.7563025210084033) internal successors, (447), 220 states have internal predecessors, (447), 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) [2022-11-19 07:56:27,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:27,439 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;@7ab9c8ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:27,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-19 07:56:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 119 states have (on average 3.7563025210084033) internal successors, (447), 220 states have internal predecessors, (447), 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) [2022-11-19 07:56:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:56:27,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:27,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:56:27,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 25676, now seen corresponding path program 1 times [2022-11-19 07:56:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992618061] [2022-11-19 07:56:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:27,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:27,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:27,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992618061] [2022-11-19 07:56:27,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992618061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:27,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:27,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:56:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283212197] [2022-11-19 07:56:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:27,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:56:27,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:56:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:56:27,714 INFO L87 Difference]: Start difference. First operand has 221 states, 119 states have (on average 3.7563025210084033) internal successors, (447), 220 states have internal predecessors, (447), 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 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:27,825 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2022-11-19 07:56:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:56:27,827 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:56:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:27,843 INFO L225 Difference]: With dead ends: 143 [2022-11-19 07:56:27,843 INFO L226 Difference]: Without dead ends: 143 [2022-11-19 07:56:27,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:56:27,852 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:27,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-19 07:56:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-19 07:56:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 93 states have (on average 2.967741935483871) internal successors, (276), 142 states have internal predecessors, (276), 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) [2022-11-19 07:56:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 276 transitions. [2022-11-19 07:56:27,926 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 276 transitions. Word has length 2 [2022-11-19 07:56:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:27,927 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 276 transitions. [2022-11-19 07:56:27,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 276 transitions. [2022-11-19 07:56:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:56:27,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:27,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:56:27,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:56:27,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 25671, now seen corresponding path program 1 times [2022-11-19 07:56:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:27,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97745419] [2022-11-19 07:56:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:28,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97745419] [2022-11-19 07:56:28,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97745419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:28,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:56:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870708526] [2022-11-19 07:56:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:28,012 INFO L87 Difference]: Start difference. First operand 143 states and 276 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:28,109 INFO L93 Difference]: Finished difference Result 131 states and 241 transitions. [2022-11-19 07:56:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:56:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:28,114 INFO L225 Difference]: With dead ends: 131 [2022-11-19 07:56:28,114 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 07:56:28,115 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 [2022-11-19 07:56:28,116 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:28,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 07:56:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2022-11-19 07:56:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 2.6292134831460676) internal successors, (234), 123 states have internal predecessors, (234), 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) [2022-11-19 07:56:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 234 transitions. [2022-11-19 07:56:28,147 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 234 transitions. Word has length 2 [2022-11-19 07:56:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:28,148 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 234 transitions. [2022-11-19 07:56:28,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 234 transitions. [2022-11-19 07:56:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:56:28,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:56:28,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:56:28,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 25672, now seen corresponding path program 1 times [2022-11-19 07:56:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307251616] [2022-11-19 07:56:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:28,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307251616] [2022-11-19 07:56:28,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307251616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:28,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:28,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:56:28,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284458198] [2022-11-19 07:56:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:28,291 INFO L87 Difference]: Start difference. First operand 124 states and 234 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:28,358 INFO L93 Difference]: Finished difference Result 100 states and 183 transitions. [2022-11-19 07:56:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:56:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:28,359 INFO L225 Difference]: With dead ends: 100 [2022-11-19 07:56:28,360 INFO L226 Difference]: Without dead ends: 100 [2022-11-19 07:56:28,360 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 [2022-11-19 07:56:28,361 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:28,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-19 07:56:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-19 07:56:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 2.231707317073171) internal successors, (183), 99 states have internal predecessors, (183), 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) [2022-11-19 07:56:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 183 transitions. [2022-11-19 07:56:28,368 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 183 transitions. Word has length 2 [2022-11-19 07:56:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:28,368 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 183 transitions. [2022-11-19 07:56:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 183 transitions. [2022-11-19 07:56:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:56:28,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:56:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:56:28,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash 24688470, now seen corresponding path program 1 times [2022-11-19 07:56:28,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73017010] [2022-11-19 07:56:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:28,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:28,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73017010] [2022-11-19 07:56:28,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73017010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:28,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:28,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86125178] [2022-11-19 07:56:28,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:28,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:28,473 INFO L87 Difference]: Start difference. First operand 100 states and 183 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-19 07:56:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:28,579 INFO L93 Difference]: Finished difference Result 86 states and 156 transitions. [2022-11-19 07:56:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:28,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-19 07:56:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:28,582 INFO L225 Difference]: With dead ends: 86 [2022-11-19 07:56:28,582 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 07:56:28,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:28,585 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:28,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 07:56:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-11-19 07:56:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 83 states have internal predecessors, (155), 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) [2022-11-19 07:56:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 155 transitions. [2022-11-19 07:56:28,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 155 transitions. Word has length 4 [2022-11-19 07:56:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:28,606 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 155 transitions. [2022-11-19 07:56:28,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-19 07:56:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 155 transitions. [2022-11-19 07:56:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:56:28,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:56:28,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:56:28,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash 24688469, now seen corresponding path program 1 times [2022-11-19 07:56:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604378480] [2022-11-19 07:56:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:28,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:28,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604378480] [2022-11-19 07:56:28,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604378480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:28,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:56:28,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908145333] [2022-11-19 07:56:28,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:28,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:28,765 INFO L87 Difference]: Start difference. First operand 84 states and 155 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:28,812 INFO L93 Difference]: Finished difference Result 68 states and 127 transitions. [2022-11-19 07:56:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:28,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:56:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:28,813 INFO L225 Difference]: With dead ends: 68 [2022-11-19 07:56:28,813 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 07:56:28,814 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 [2022-11-19 07:56:28,815 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:28,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:56:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 07:56:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-19 07:56:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 2.189655172413793) internal successors, (127), 67 states have internal predecessors, (127), 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) [2022-11-19 07:56:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 127 transitions. [2022-11-19 07:56:28,826 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 127 transitions. Word has length 4 [2022-11-19 07:56:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:28,826 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 127 transitions. [2022-11-19 07:56:28,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 127 transitions. [2022-11-19 07:56:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:56:28,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:56:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:56:28,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash 765344428, now seen corresponding path program 1 times [2022-11-19 07:56:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234651643] [2022-11-19 07:56:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:28,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:28,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234651643] [2022-11-19 07:56:28,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234651643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:28,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:28,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:28,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152219048] [2022-11-19 07:56:28,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:28,951 INFO L87 Difference]: Start difference. First operand 68 states and 127 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:29,006 INFO L93 Difference]: Finished difference Result 68 states and 126 transitions. [2022-11-19 07:56:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:56:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:29,008 INFO L225 Difference]: With dead ends: 68 [2022-11-19 07:56:29,008 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 07:56:29,008 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 [2022-11-19 07:56:29,009 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:29,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:56:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 07:56:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-19 07:56:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 67 states have internal predecessors, (126), 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) [2022-11-19 07:56:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 126 transitions. [2022-11-19 07:56:29,015 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 126 transitions. Word has length 5 [2022-11-19 07:56:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:29,015 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 126 transitions. [2022-11-19 07:56:29,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 126 transitions. [2022-11-19 07:56:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:56:29,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:29,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:56:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:56:29,019 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2044137750, now seen corresponding path program 1 times [2022-11-19 07:56:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877617982] [2022-11-19 07:56:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:29,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877617982] [2022-11-19 07:56:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877617982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:29,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:29,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816664831] [2022-11-19 07:56:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:29,099 INFO L87 Difference]: Start difference. First operand 68 states and 126 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2022-11-19 07:56:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:29,117 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-11-19 07:56:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 [2022-11-19 07:56:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:29,118 INFO L225 Difference]: With dead ends: 19 [2022-11-19 07:56:29,118 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 07:56:29,118 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 [2022-11-19 07:56:29,119 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:29,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:56:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 07:56:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 07:56:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 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) [2022-11-19 07:56:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2022-11-19 07:56:29,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 6 [2022-11-19 07:56:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:29,122 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2022-11-19 07:56:29,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2022-11-19 07:56:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2022-11-19 07:56:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:56:29,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:29,123 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-19 07:56:29,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:56:29,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2044240136, now seen corresponding path program 1 times [2022-11-19 07:56:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:29,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368502485] [2022-11-19 07:56:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:29,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:29,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:56:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:29,169 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:56:29,169 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:56:29,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2022-11-19 07:56:29,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 42 remaining) [2022-11-19 07:56:29,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 42 remaining) [2022-11-19 07:56:29,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 42 remaining) [2022-11-19 07:56:29,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 42 remaining) [2022-11-19 07:56:29,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (36 of 42 remaining) [2022-11-19 07:56:29,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 42 remaining) [2022-11-19 07:56:29,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 42 remaining) [2022-11-19 07:56:29,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (33 of 42 remaining) [2022-11-19 07:56:29,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (32 of 42 remaining) [2022-11-19 07:56:29,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 42 remaining) [2022-11-19 07:56:29,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 42 remaining) [2022-11-19 07:56:29,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 42 remaining) [2022-11-19 07:56:29,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 42 remaining) [2022-11-19 07:56:29,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 42 remaining) [2022-11-19 07:56:29,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 42 remaining) [2022-11-19 07:56:29,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 42 remaining) [2022-11-19 07:56:29,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 42 remaining) [2022-11-19 07:56:29,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 42 remaining) [2022-11-19 07:56:29,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 42 remaining) [2022-11-19 07:56:29,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (21 of 42 remaining) [2022-11-19 07:56:29,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 42 remaining) [2022-11-19 07:56:29,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 42 remaining) [2022-11-19 07:56:29,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 42 remaining) [2022-11-19 07:56:29,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 42 remaining) [2022-11-19 07:56:29,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 42 remaining) [2022-11-19 07:56:29,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 42 remaining) [2022-11-19 07:56:29,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (14 of 42 remaining) [2022-11-19 07:56:29,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 42 remaining) [2022-11-19 07:56:29,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 42 remaining) [2022-11-19 07:56:29,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (11 of 42 remaining) [2022-11-19 07:56:29,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (10 of 42 remaining) [2022-11-19 07:56:29,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 42 remaining) [2022-11-19 07:56:29,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 42 remaining) [2022-11-19 07:56:29,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 42 remaining) [2022-11-19 07:56:29,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 42 remaining) [2022-11-19 07:56:29,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 42 remaining) [2022-11-19 07:56:29,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 42 remaining) [2022-11-19 07:56:29,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 42 remaining) [2022-11-19 07:56:29,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 42 remaining) [2022-11-19 07:56:29,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 42 remaining) [2022-11-19 07:56:29,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 42 remaining) [2022-11-19 07:56:29,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:56:29,183 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:29,185 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:56:29,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-19 07:56:29,234 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:56:29,238 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:56:29,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 264 transitions, 540 flow [2022-11-19 07:56:29,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 264 transitions, 540 flow [2022-11-19 07:56:29,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 264 transitions, 540 flow [2022-11-19 07:56:29,332 INFO L130 PetriNetUnfolder]: 27/298 cut-off events. [2022-11-19 07:56:29,333 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-19 07:56:29,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 298 events. 27/298 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 976 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 242. Up to 6 conditions per place. [2022-11-19 07:56:29,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 33824 [2022-11-19 07:56:44,537 INFO L134 LiptonReduction]: Checked pairs total: 47537 [2022-11-19 07:56:44,537 INFO L136 LiptonReduction]: Total number of compositions: 291 [2022-11-19 07:56:44,539 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 86 transitions, 184 flow [2022-11-19 07:56:44,860 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9772 states, 7691 states have (on average 4.023403978676375) internal successors, (30944), 9771 states have internal predecessors, (30944), 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) [2022-11-19 07:56:44,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:44,862 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;@7ab9c8ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:44,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-11-19 07:56:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 9772 states, 7691 states have (on average 4.023403978676375) internal successors, (30944), 9771 states have internal predecessors, (30944), 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) [2022-11-19 07:56:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:56:44,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:44,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:56:44,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 46827, now seen corresponding path program 1 times [2022-11-19 07:56:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:44,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238699925] [2022-11-19 07:56:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:44,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:44,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238699925] [2022-11-19 07:56:44,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238699925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:44,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:44,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:56:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008537666] [2022-11-19 07:56:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:44,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:44,965 INFO L87 Difference]: Start difference. First operand has 9772 states, 7691 states have (on average 4.023403978676375) internal successors, (30944), 9771 states have internal predecessors, (30944), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:45,282 INFO L93 Difference]: Finished difference Result 6719 states and 19704 transitions. [2022-11-19 07:56:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:56:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:45,332 INFO L225 Difference]: With dead ends: 6719 [2022-11-19 07:56:45,332 INFO L226 Difference]: Without dead ends: 6719 [2022-11-19 07:56:45,332 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 [2022-11-19 07:56:45,333 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:45,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 10 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6719 states. [2022-11-19 07:56:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6719 to 6258. [2022-11-19 07:56:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6258 states, 5521 states have (on average 3.3919579786270604) internal successors, (18727), 6257 states have internal predecessors, (18727), 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) [2022-11-19 07:56:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 18727 transitions. [2022-11-19 07:56:45,629 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 18727 transitions. Word has length 2 [2022-11-19 07:56:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:45,629 INFO L495 AbstractCegarLoop]: Abstraction has 6258 states and 18727 transitions. [2022-11-19 07:56:45,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 18727 transitions. [2022-11-19 07:56:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:56:45,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:45,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:56:45,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:56:45,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash 46829, now seen corresponding path program 1 times [2022-11-19 07:56:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:45,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365110624] [2022-11-19 07:56:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:45,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365110624] [2022-11-19 07:56:45,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365110624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:45,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:45,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:56:45,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500863868] [2022-11-19 07:56:45,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:45,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:45,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:45,671 INFO L87 Difference]: Start difference. First operand 6258 states and 18727 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:45,967 INFO L93 Difference]: Finished difference Result 5296 states and 15575 transitions. [2022-11-19 07:56:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:56:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:46,000 INFO L225 Difference]: With dead ends: 5296 [2022-11-19 07:56:46,000 INFO L226 Difference]: Without dead ends: 5296 [2022-11-19 07:56:46,001 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 [2022-11-19 07:56:46,002 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:46,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 5 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2022-11-19 07:56:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 5296. [2022-11-19 07:56:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5296 states, 4902 states have (on average 3.1772745818033457) internal successors, (15575), 5295 states have internal predecessors, (15575), 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) [2022-11-19 07:56:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5296 states to 5296 states and 15575 transitions. [2022-11-19 07:56:46,187 INFO L78 Accepts]: Start accepts. Automaton has 5296 states and 15575 transitions. Word has length 2 [2022-11-19 07:56:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:46,187 INFO L495 AbstractCegarLoop]: Abstraction has 5296 states and 15575 transitions. [2022-11-19 07:56:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:56:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 5296 states and 15575 transitions. [2022-11-19 07:56:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:56:46,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:46,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:56:46,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:56:46,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1396215250, now seen corresponding path program 1 times [2022-11-19 07:56:46,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908640676] [2022-11-19 07:56:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:46,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:46,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908640676] [2022-11-19 07:56:46,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908640676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:46,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:46,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:46,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914446429] [2022-11-19 07:56:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:46,304 INFO L87 Difference]: Start difference. First operand 5296 states and 15575 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:46,685 INFO L93 Difference]: Finished difference Result 5065 states and 14507 transitions. [2022-11-19 07:56:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:56:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:56:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:46,718 INFO L225 Difference]: With dead ends: 5065 [2022-11-19 07:56:46,718 INFO L226 Difference]: Without dead ends: 5065 [2022-11-19 07:56:46,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:46,719 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 149 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:46,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 19 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:56:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2022-11-19 07:56:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 4486. [2022-11-19 07:56:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4204 states have (on average 3.227640342530923) internal successors, (13569), 4485 states have internal predecessors, (13569), 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) [2022-11-19 07:56:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 13569 transitions. [2022-11-19 07:56:46,906 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 13569 transitions. Word has length 5 [2022-11-19 07:56:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:46,907 INFO L495 AbstractCegarLoop]: Abstraction has 4486 states and 13569 transitions. [2022-11-19 07:56:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 13569 transitions. [2022-11-19 07:56:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:56:46,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:46,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:56:46,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:56:46,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1396215251, now seen corresponding path program 1 times [2022-11-19 07:56:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:46,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474188559] [2022-11-19 07:56:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:47,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474188559] [2022-11-19 07:56:47,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474188559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:47,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:47,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414886186] [2022-11-19 07:56:47,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:47,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:47,020 INFO L87 Difference]: Start difference. First operand 4486 states and 13569 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:47,171 INFO L93 Difference]: Finished difference Result 3418 states and 10365 transitions. [2022-11-19 07:56:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:56:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:47,205 INFO L225 Difference]: With dead ends: 3418 [2022-11-19 07:56:47,205 INFO L226 Difference]: Without dead ends: 3418 [2022-11-19 07:56:47,205 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 [2022-11-19 07:56:47,206 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:47,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 5 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2022-11-19 07:56:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3418. [2022-11-19 07:56:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3248 states have (on average 3.1911945812807883) internal successors, (10365), 3417 states have internal predecessors, (10365), 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) [2022-11-19 07:56:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 10365 transitions. [2022-11-19 07:56:47,348 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 10365 transitions. Word has length 5 [2022-11-19 07:56:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:47,348 INFO L495 AbstractCegarLoop]: Abstraction has 3418 states and 10365 transitions. [2022-11-19 07:56:47,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 10365 transitions. [2022-11-19 07:56:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:47,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:47,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:47,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:56:47,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2108502583, now seen corresponding path program 1 times [2022-11-19 07:56:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124807023] [2022-11-19 07:56:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:47,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:47,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124807023] [2022-11-19 07:56:47,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124807023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:47,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:47,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:56:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078199273] [2022-11-19 07:56:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:47,435 INFO L87 Difference]: Start difference. First operand 3418 states and 10365 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-19 07:56:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:47,707 INFO L93 Difference]: Finished difference Result 3814 states and 11477 transitions. [2022-11-19 07:56:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:56:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-11-19 07:56:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:47,726 INFO L225 Difference]: With dead ends: 3814 [2022-11-19 07:56:47,726 INFO L226 Difference]: Without dead ends: 3814 [2022-11-19 07:56:47,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:47,728 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:47,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 36 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2022-11-19 07:56:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3796. [2022-11-19 07:56:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3626 states have (on average 3.1577495863210148) internal successors, (11450), 3795 states have internal predecessors, (11450), 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) [2022-11-19 07:56:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11450 transitions. [2022-11-19 07:56:47,872 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11450 transitions. Word has length 8 [2022-11-19 07:56:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:47,873 INFO L495 AbstractCegarLoop]: Abstraction has 3796 states and 11450 transitions. [2022-11-19 07:56:47,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-19 07:56:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11450 transitions. [2022-11-19 07:56:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:56:47,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:47,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:56:47,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash 671110429, now seen corresponding path program 1 times [2022-11-19 07:56:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789440409] [2022-11-19 07:56:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:47,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789440409] [2022-11-19 07:56:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789440409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:47,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:47,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:47,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403798580] [2022-11-19 07:56:47,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:47,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:47,906 INFO L87 Difference]: Start difference. First operand 3796 states and 11450 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-19 07:56:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:48,030 INFO L93 Difference]: Finished difference Result 1104 states and 3164 transitions. [2022-11-19 07:56:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-19 07:56:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:48,034 INFO L225 Difference]: With dead ends: 1104 [2022-11-19 07:56:48,035 INFO L226 Difference]: Without dead ends: 1104 [2022-11-19 07:56:48,035 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 [2022-11-19 07:56:48,035 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:48,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-19 07:56:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1028. [2022-11-19 07:56:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 996 states have (on average 2.9698795180722892) internal successors, (2958), 1027 states have internal predecessors, (2958), 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) [2022-11-19 07:56:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2958 transitions. [2022-11-19 07:56:48,060 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2958 transitions. Word has length 9 [2022-11-19 07:56:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:48,061 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 2958 transitions. [2022-11-19 07:56:48,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-19 07:56:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2958 transitions. [2022-11-19 07:56:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:56:48,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:48,062 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:48,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:56:48,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1740513472, now seen corresponding path program 1 times [2022-11-19 07:56:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:48,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186493076] [2022-11-19 07:56:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:48,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:48,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186493076] [2022-11-19 07:56:48,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186493076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:48,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:48,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:56:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412174838] [2022-11-19 07:56:48,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:48,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:56:48,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:56:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:56:48,230 INFO L87 Difference]: Start difference. First operand 1028 states and 2958 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2022-11-19 07:56:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:48,468 INFO L93 Difference]: Finished difference Result 1080 states and 3111 transitions. [2022-11-19 07:56:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:56:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2022-11-19 07:56:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:48,474 INFO L225 Difference]: With dead ends: 1080 [2022-11-19 07:56:48,474 INFO L226 Difference]: Without dead ends: 1080 [2022-11-19 07:56:48,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:56:48,476 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 38 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 [2022-11-19 07:56:48,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 38 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-19 07:56:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 938. [2022-11-19 07:56:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 906 states have (on average 2.967991169977925) internal successors, (2689), 937 states have internal predecessors, (2689), 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) [2022-11-19 07:56:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2689 transitions. [2022-11-19 07:56:48,505 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2689 transitions. Word has length 11 [2022-11-19 07:56:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:48,505 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 2689 transitions. [2022-11-19 07:56:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2022-11-19 07:56:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2689 transitions. [2022-11-19 07:56:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:56:48,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:48,509 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:56:48,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:56:48,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-19 07:56:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2048590810, now seen corresponding path program 1 times [2022-11-19 07:56:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:48,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964059310] [2022-11-19 07:56:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:48,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:56:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:48,556 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:56:48,559 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:56:48,560 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (60 of 61 remaining) [2022-11-19 07:56:48,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 61 remaining) [2022-11-19 07:56:48,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 61 remaining) [2022-11-19 07:56:48,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 61 remaining) [2022-11-19 07:56:48,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 61 remaining) [2022-11-19 07:56:48,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (55 of 61 remaining) [2022-11-19 07:56:48,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 61 remaining) [2022-11-19 07:56:48,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 61 remaining) [2022-11-19 07:56:48,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (52 of 61 remaining) [2022-11-19 07:56:48,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (51 of 61 remaining) [2022-11-19 07:56:48,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 61 remaining) [2022-11-19 07:56:48,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 61 remaining) [2022-11-19 07:56:48,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 61 remaining) [2022-11-19 07:56:48,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 61 remaining) [2022-11-19 07:56:48,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 61 remaining) [2022-11-19 07:56:48,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 61 remaining) [2022-11-19 07:56:48,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 61 remaining) [2022-11-19 07:56:48,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 61 remaining) [2022-11-19 07:56:48,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 61 remaining) [2022-11-19 07:56:48,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 61 remaining) [2022-11-19 07:56:48,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (40 of 61 remaining) [2022-11-19 07:56:48,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 61 remaining) [2022-11-19 07:56:48,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 61 remaining) [2022-11-19 07:56:48,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 61 remaining) [2022-11-19 07:56:48,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 61 remaining) [2022-11-19 07:56:48,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 61 remaining) [2022-11-19 07:56:48,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 61 remaining) [2022-11-19 07:56:48,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (33 of 61 remaining) [2022-11-19 07:56:48,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 61 remaining) [2022-11-19 07:56:48,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 61 remaining) [2022-11-19 07:56:48,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (30 of 61 remaining) [2022-11-19 07:56:48,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (29 of 61 remaining) [2022-11-19 07:56:48,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 61 remaining) [2022-11-19 07:56:48,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 61 remaining) [2022-11-19 07:56:48,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 61 remaining) [2022-11-19 07:56:48,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 61 remaining) [2022-11-19 07:56:48,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 61 remaining) [2022-11-19 07:56:48,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 61 remaining) [2022-11-19 07:56:48,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 61 remaining) [2022-11-19 07:56:48,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 61 remaining) [2022-11-19 07:56:48,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 61 remaining) [2022-11-19 07:56:48,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 61 remaining) [2022-11-19 07:56:48,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 61 remaining) [2022-11-19 07:56:48,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 61 remaining) [2022-11-19 07:56:48,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 61 remaining) [2022-11-19 07:56:48,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 61 remaining) [2022-11-19 07:56:48,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (14 of 61 remaining) [2022-11-19 07:56:48,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 61 remaining) [2022-11-19 07:56:48,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 61 remaining) [2022-11-19 07:56:48,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (11 of 61 remaining) [2022-11-19 07:56:48,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (10 of 61 remaining) [2022-11-19 07:56:48,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 61 remaining) [2022-11-19 07:56:48,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 61 remaining) [2022-11-19 07:56:48,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 61 remaining) [2022-11-19 07:56:48,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 61 remaining) [2022-11-19 07:56:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 61 remaining) [2022-11-19 07:56:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 61 remaining) [2022-11-19 07:56:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 61 remaining) [2022-11-19 07:56:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 61 remaining) [2022-11-19 07:56:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 61 remaining) [2022-11-19 07:56:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 61 remaining) [2022-11-19 07:56:48,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:56:48,592 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:48,593 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:56:48,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-19 07:56:48,681 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:56:48,686 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:56:48,687 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 377 transitions, 775 flow [2022-11-19 07:56:48,687 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 377 transitions, 775 flow [2022-11-19 07:56:48,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 377 transitions, 775 flow [2022-11-19 07:56:48,848 INFO L130 PetriNetUnfolder]: 40/429 cut-off events. [2022-11-19 07:56:48,848 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-19 07:56:48,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 429 events. 40/429 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1740 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 354. Up to 8 conditions per place. [2022-11-19 07:56:48,906 INFO L119 LiptonReduction]: Number of co-enabled transitions 88704 [2022-11-19 07:57:11,281 INFO L134 LiptonReduction]: Checked pairs total: 139048 [2022-11-19 07:57:11,281 INFO L136 LiptonReduction]: Total number of compositions: 418 [2022-11-19 07:57:11,283 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 128 transitions, 277 flow [2022-11-19 07:57:23,533 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 352583 states, 310903 states have (on average 4.883700060790664) internal successors, (1518357), 352582 states have internal predecessors, (1518357), 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) [2022-11-19 07:57:23,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:57:23,535 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;@7ab9c8ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:57:23,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2022-11-19 07:57:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 352583 states, 310903 states have (on average 4.883700060790664) internal successors, (1518357), 352582 states have internal predecessors, (1518357), 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) [2022-11-19 07:57:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:57:24,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:24,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:57:24,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-19 07:57:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 75198, now seen corresponding path program 1 times [2022-11-19 07:57:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:24,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032904349] [2022-11-19 07:57:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:24,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032904349] [2022-11-19 07:57:24,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032904349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:24,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:24,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:57:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025565881] [2022-11-19 07:57:24,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:24,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:25,385 INFO L87 Difference]: Start difference. First operand has 352583 states, 310903 states have (on average 4.883700060790664) internal successors, (1518357), 352582 states have internal predecessors, (1518357), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:57:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:29,465 INFO L93 Difference]: Finished difference Result 245858 states and 984832 transitions. [2022-11-19 07:57:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:57:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:32,393 INFO L225 Difference]: With dead ends: 245858 [2022-11-19 07:57:32,393 INFO L226 Difference]: Without dead ends: 245858 [2022-11-19 07:57:32,394 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 [2022-11-19 07:57:32,394 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:32,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 18 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:57:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245858 states. [2022-11-19 07:57:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245858 to 223137. [2022-11-19 07:57:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223137 states, 209324 states have (on average 4.354603389960062) internal successors, (911523), 223136 states have internal predecessors, (911523), 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) [2022-11-19 07:57:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223137 states to 223137 states and 911523 transitions. [2022-11-19 07:57:45,418 INFO L78 Accepts]: Start accepts. Automaton has 223137 states and 911523 transitions. Word has length 2 [2022-11-19 07:57:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:45,418 INFO L495 AbstractCegarLoop]: Abstraction has 223137 states and 911523 transitions. [2022-11-19 07:57:45,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:57:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 223137 states and 911523 transitions. [2022-11-19 07:57:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:57:45,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:45,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:57:45,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:57:45,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-19 07:57:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 75199, now seen corresponding path program 1 times [2022-11-19 07:57:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:45,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191775276] [2022-11-19 07:57:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:45,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191775276] [2022-11-19 07:57:45,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191775276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:45,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:45,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:57:45,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703385774] [2022-11-19 07:57:45,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:45,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:45,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:45,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:45,474 INFO L87 Difference]: Start difference. First operand 223137 states and 911523 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-19 07:57:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:48,904 INFO L93 Difference]: Finished difference Result 190368 states and 765961 transitions. [2022-11-19 07:57:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:48,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-19 07:57:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:50,363 INFO L225 Difference]: With dead ends: 190368 [2022-11-19 07:57:50,363 INFO L226 Difference]: Without dead ends: 190368 [2022-11-19 07:57:50,363 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 [2022-11-19 07:57:50,364 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:50,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 9 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:57:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190368 states.