./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0 --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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- 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-e04fb08 [2022-11-16 16:13:42,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:13:42,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:13:42,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:13:42,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:13:42,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:13:42,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:13:42,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:13:42,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:13:42,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:13:42,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:13:42,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:13:42,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:13:42,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:13:42,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:13:42,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:13:42,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:13:42,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:13:42,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:13:42,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:13:42,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:13:42,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:13:42,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:13:42,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:13:42,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:13:42,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:13:42,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:13:42,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:13:42,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:13:42,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:13:42,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:13:42,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:13:42,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:13:42,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:13:42,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:13:42,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:13:42,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:13:42,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:13:42,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:13:42,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:13:42,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:13:42,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 16:13:42,322 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:13:42,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:13:42,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:13:42,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:13:42,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:13:42,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:13:42,326 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:13:42,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:13:42,327 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:13:42,327 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:13:42,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:13:42,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:13:42,329 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:13:42,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:13:42,330 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:13:42,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:13:42,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:13:42,331 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:13:42,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:13:42,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:13:42,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:13:42,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:13:42,333 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:13:42,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:13:42,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:13:42,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:13:42,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:13:42,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:13:42,335 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:13:42,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:13:42,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:13:42,337 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:13:42,337 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:13:42,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:13:42,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:13:42,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:13:42,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:13:42,339 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:13:42,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:13:42,339 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:13:42,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:13:42,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:13:42,341 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_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2022-11-16 16:13:42,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:13:42,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:13:42,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:13:42,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:13:42,760 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:13:42,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/pthread/queue_longest.i [2022-11-16 16:13:42,845 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/data/bd1ef9605/4ed03aea51034e929fcc79e952c8d00e/FLAG83bf97403 [2022-11-16 16:13:43,656 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:13:43,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i [2022-11-16 16:13:43,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/data/bd1ef9605/4ed03aea51034e929fcc79e952c8d00e/FLAG83bf97403 [2022-11-16 16:13:43,856 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/data/bd1ef9605/4ed03aea51034e929fcc79e952c8d00e [2022-11-16 16:13:43,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:13:43,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:13:43,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:13:43,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:13:43,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:13:43,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:13:43" (1/1) ... [2022-11-16 16:13:43,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d29fb47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:43, skipping insertion in model container [2022-11-16 16:13:43,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:13:43" (1/1) ... [2022-11-16 16:13:43,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:13:43,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:13:44,754 WARN L229 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_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-11-16 16:13:44,766 WARN L229 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_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-11-16 16:13:44,774 WARN L229 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_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-11-16 16:13:44,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:13:44,807 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:13:44,881 WARN L229 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_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-11-16 16:13:44,886 WARN L229 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_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-11-16 16:13:44,890 WARN L229 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_2445dee3-8741-490a-98ff-02d735fca2fc/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-11-16 16:13:44,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:13:44,964 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:13:44,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44 WrapperNode [2022-11-16 16:13:44,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:13:44,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:13:44,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:13:44,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:13:44,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:44,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,035 INFO L138 Inliner]: procedures = 274, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2022-11-16 16:13:45,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:13:45,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:13:45,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:13:45,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:13:45,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,072 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:13:45,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:13:45,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:13:45,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:13:45,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (1/1) ... [2022-11-16 16:13:45,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:13:45,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:13:45,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:13:45,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:13:45,185 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 16:13:45,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 16:13:45,185 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 16:13:45,186 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 16:13:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:13:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:13:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 16:13:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 16:13:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 16:13:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:13:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:13:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:13:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:13:45,190 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 16:13:45,374 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:13:45,377 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:13:46,230 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:13:46,242 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:13:46,242 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 16:13:46,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:13:46 BoogieIcfgContainer [2022-11-16 16:13:46,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:13:46,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:13:46,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:13:46,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:13:46,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:13:43" (1/3) ... [2022-11-16 16:13:46,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca94235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:13:46, skipping insertion in model container [2022-11-16 16:13:46,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:13:44" (2/3) ... [2022-11-16 16:13:46,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca94235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:13:46, skipping insertion in model container [2022-11-16 16:13:46,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:13:46" (3/3) ... [2022-11-16 16:13:46,259 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2022-11-16 16:13:46,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:13:46,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-11-16 16:13:46,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:13:46,474 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 16:13:46,531 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:13:46,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 354 transitions, 724 flow [2022-11-16 16:13:46,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 354 transitions, 724 flow [2022-11-16 16:13:46,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 354 transitions, 724 flow [2022-11-16 16:13:46,750 INFO L130 PetriNetUnfolder]: 15/352 cut-off events. [2022-11-16 16:13:46,750 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 16:13:46,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 352 events. 15/352 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 768 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 253. Up to 2 conditions per place. [2022-11-16 16:13:46,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-11-16 16:14:18,385 INFO L134 LiptonReduction]: Checked pairs total: 102888 [2022-11-16 16:14:18,385 INFO L136 LiptonReduction]: Total number of compositions: 575 [2022-11-16 16:14:18,396 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 139 places, 142 transitions, 300 flow [2022-11-16 16:14:18,764 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9813 states, 7156 states have (on average 3.938932364449413) internal successors, (28187), 9812 states have internal predecessors, (28187), 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) [2022-11-16 16:14:18,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:14:18,800 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;@3adb3bd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:14:18,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-11-16 16:14:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 9813 states, 7156 states have (on average 3.938932364449413) internal successors, (28187), 9812 states have internal predecessors, (28187), 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) [2022-11-16 16:14:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 16:14:18,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:18,860 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 16:14:18,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1567, now seen corresponding path program 1 times [2022-11-16 16:14:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:18,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531606364] [2022-11-16 16:14:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:19,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:19,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531606364] [2022-11-16 16:14:19,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531606364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:19,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:19,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 16:14:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036229115] [2022-11-16 16:14:19,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:19,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 16:14:19,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 16:14:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:14:19,108 INFO L87 Difference]: Start difference. First operand has 9813 states, 7156 states have (on average 3.938932364449413) internal successors, (28187), 9812 states have internal predecessors, (28187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:19,502 INFO L93 Difference]: Finished difference Result 4512 states and 12954 transitions. [2022-11-16 16:14:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 16:14:19,505 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-16 16:14:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:19,567 INFO L225 Difference]: With dead ends: 4512 [2022-11-16 16:14:19,567 INFO L226 Difference]: Without dead ends: 4512 [2022-11-16 16:14:19,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:14:19,573 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:19,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2022-11-16 16:14:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4512. [2022-11-16 16:14:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3943 states have (on average 3.2853157494293685) internal successors, (12954), 4511 states have internal predecessors, (12954), 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) [2022-11-16 16:14:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 12954 transitions. [2022-11-16 16:14:19,887 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 12954 transitions. Word has length 1 [2022-11-16 16:14:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:19,888 INFO L495 AbstractCegarLoop]: Abstraction has 4512 states and 12954 transitions. [2022-11-16 16:14:19,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 12954 transitions. [2022-11-16 16:14:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:14:19,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:19,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:14:19,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:14:19,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1583870, now seen corresponding path program 1 times [2022-11-16 16:14:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:19,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781468752] [2022-11-16 16:14:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:20,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781468752] [2022-11-16 16:14:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781468752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:20,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111568701] [2022-11-16 16:14:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:20,592 INFO L87 Difference]: Start difference. First operand 4512 states and 12954 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:20,811 INFO L93 Difference]: Finished difference Result 3956 states and 11392 transitions. [2022-11-16 16:14:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:14:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:20,842 INFO L225 Difference]: With dead ends: 3956 [2022-11-16 16:14:20,842 INFO L226 Difference]: Without dead ends: 3956 [2022-11-16 16:14:20,843 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 [2022-11-16 16:14:20,844 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:20,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 5 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2022-11-16 16:14:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3956. [2022-11-16 16:14:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3956 states, 3550 states have (on average 3.209014084507042) internal successors, (11392), 3955 states have internal predecessors, (11392), 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) [2022-11-16 16:14:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3956 states to 3956 states and 11392 transitions. [2022-11-16 16:14:21,098 INFO L78 Accepts]: Start accepts. Automaton has 3956 states and 11392 transitions. Word has length 3 [2022-11-16 16:14:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:21,099 INFO L495 AbstractCegarLoop]: Abstraction has 3956 states and 11392 transitions. [2022-11-16 16:14:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3956 states and 11392 transitions. [2022-11-16 16:14:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:14:21,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:21,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:14:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:14:21,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1583871, now seen corresponding path program 1 times [2022-11-16 16:14:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:21,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658338006] [2022-11-16 16:14:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:21,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:21,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658338006] [2022-11-16 16:14:21,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658338006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:21,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:21,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:21,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883634557] [2022-11-16 16:14:21,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:21,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:21,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:21,248 INFO L87 Difference]: Start difference. First operand 3956 states and 11392 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:21,473 INFO L93 Difference]: Finished difference Result 3520 states and 10165 transitions. [2022-11-16 16:14:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:21,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:14:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:21,501 INFO L225 Difference]: With dead ends: 3520 [2022-11-16 16:14:21,501 INFO L226 Difference]: Without dead ends: 3520 [2022-11-16 16:14:21,502 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 [2022-11-16 16:14:21,503 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:21,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 5 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2022-11-16 16:14:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 3520. [2022-11-16 16:14:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3230 states have (on average 3.1470588235294117) internal successors, (10165), 3519 states have internal predecessors, (10165), 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) [2022-11-16 16:14:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 10165 transitions. [2022-11-16 16:14:21,639 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 10165 transitions. Word has length 3 [2022-11-16 16:14:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:21,639 INFO L495 AbstractCegarLoop]: Abstraction has 3520 states and 10165 transitions. [2022-11-16 16:14:21,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 10165 transitions. [2022-11-16 16:14:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:14:21,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:21,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:14:21,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:14:21,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:21,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1583753, now seen corresponding path program 1 times [2022-11-16 16:14:21,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:21,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023898607] [2022-11-16 16:14:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:21,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023898607] [2022-11-16 16:14:21,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023898607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:21,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:21,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704728463] [2022-11-16 16:14:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:21,703 INFO L87 Difference]: Start difference. First operand 3520 states and 10165 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:21,877 INFO L93 Difference]: Finished difference Result 3460 states and 10039 transitions. [2022-11-16 16:14:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:14:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:21,903 INFO L225 Difference]: With dead ends: 3460 [2022-11-16 16:14:21,904 INFO L226 Difference]: Without dead ends: 3460 [2022-11-16 16:14:21,904 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 [2022-11-16 16:14:21,905 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:21,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 5 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-11-16 16:14:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3460. [2022-11-16 16:14:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3189 states have (on average 3.148008780181875) internal successors, (10039), 3459 states have internal predecessors, (10039), 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) [2022-11-16 16:14:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 10039 transitions. [2022-11-16 16:14:22,096 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 10039 transitions. Word has length 3 [2022-11-16 16:14:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:22,097 INFO L495 AbstractCegarLoop]: Abstraction has 3460 states and 10039 transitions. [2022-11-16 16:14:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 10039 transitions. [2022-11-16 16:14:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:14:22,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:22,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:14:22,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:14:22,099 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1583754, now seen corresponding path program 1 times [2022-11-16 16:14:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:22,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741552507] [2022-11-16 16:14:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:22,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:22,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741552507] [2022-11-16 16:14:22,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741552507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:22,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:22,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:22,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473391154] [2022-11-16 16:14:22,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:22,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:22,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:22,200 INFO L87 Difference]: Start difference. First operand 3460 states and 10039 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:22,401 INFO L93 Difference]: Finished difference Result 3400 states and 9913 transitions. [2022-11-16 16:14:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:14:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:22,425 INFO L225 Difference]: With dead ends: 3400 [2022-11-16 16:14:22,426 INFO L226 Difference]: Without dead ends: 3400 [2022-11-16 16:14:22,426 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 [2022-11-16 16:14:22,427 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:22,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 5 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-16 16:14:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3400. [2022-11-16 16:14:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3148 states have (on average 3.1489834815756037) internal successors, (9913), 3399 states have internal predecessors, (9913), 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) [2022-11-16 16:14:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 9913 transitions. [2022-11-16 16:14:22,550 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 9913 transitions. Word has length 3 [2022-11-16 16:14:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:22,551 INFO L495 AbstractCegarLoop]: Abstraction has 3400 states and 9913 transitions. [2022-11-16 16:14:22,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 9913 transitions. [2022-11-16 16:14:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 16:14:22,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:22,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 16:14:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 16:14:22,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 49096720, now seen corresponding path program 1 times [2022-11-16 16:14:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:22,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368135267] [2022-11-16 16:14:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:22,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368135267] [2022-11-16 16:14:22,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368135267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:22,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:22,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229046420] [2022-11-16 16:14:22,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:22,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:22,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:22,968 INFO L87 Difference]: Start difference. First operand 3400 states and 9913 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) [2022-11-16 16:14:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:23,184 INFO L93 Difference]: Finished difference Result 3399 states and 9911 transitions. [2022-11-16 16:14:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:23,185 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 [2022-11-16 16:14:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:23,209 INFO L225 Difference]: With dead ends: 3399 [2022-11-16 16:14:23,210 INFO L226 Difference]: Without dead ends: 3399 [2022-11-16 16:14:23,210 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 [2022-11-16 16:14:23,212 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2022-11-16 16:14:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3399. [2022-11-16 16:14:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3147 states have (on average 3.1493485859548778) internal successors, (9911), 3398 states have internal predecessors, (9911), 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) [2022-11-16 16:14:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 9911 transitions. [2022-11-16 16:14:23,330 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 9911 transitions. Word has length 4 [2022-11-16 16:14:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:23,330 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 9911 transitions. [2022-11-16 16:14:23,330 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) [2022-11-16 16:14:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 9911 transitions. [2022-11-16 16:14:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:14:23,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:23,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:14:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 16:14:23,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1522021029, now seen corresponding path program 1 times [2022-11-16 16:14:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:23,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855951024] [2022-11-16 16:14:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:23,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:23,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855951024] [2022-11-16 16:14:23,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855951024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:23,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:23,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:23,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893082758] [2022-11-16 16:14:23,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:23,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:23,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:23,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:23,494 INFO L87 Difference]: Start difference. First operand 3399 states and 9911 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:23,663 INFO L93 Difference]: Finished difference Result 2580 states and 7292 transitions. [2022-11-16 16:14:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:14:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:23,676 INFO L225 Difference]: With dead ends: 2580 [2022-11-16 16:14:23,676 INFO L226 Difference]: Without dead ends: 2580 [2022-11-16 16:14:23,677 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 [2022-11-16 16:14:23,678 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:23,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 5 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2022-11-16 16:14:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2580. [2022-11-16 16:14:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 2412 states have (on average 3.0232172470978442) internal successors, (7292), 2579 states have internal predecessors, (7292), 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) [2022-11-16 16:14:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 7292 transitions. [2022-11-16 16:14:23,763 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 7292 transitions. Word has length 5 [2022-11-16 16:14:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:23,763 INFO L495 AbstractCegarLoop]: Abstraction has 2580 states and 7292 transitions. [2022-11-16 16:14:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 7292 transitions. [2022-11-16 16:14:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:14:23,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:23,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:14:23,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 16:14:23,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1522021030, now seen corresponding path program 1 times [2022-11-16 16:14:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:23,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538890674] [2022-11-16 16:14:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:23,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:23,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538890674] [2022-11-16 16:14:23,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538890674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:23,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:23,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:14:23,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015072383] [2022-11-16 16:14:23,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:23,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:14:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:14:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:14:23,899 INFO L87 Difference]: Start difference. First operand 2580 states and 7292 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) [2022-11-16 16:14:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:24,062 INFO L93 Difference]: Finished difference Result 1761 states and 4673 transitions. [2022-11-16 16:14:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:24,062 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 [2022-11-16 16:14:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:24,072 INFO L225 Difference]: With dead ends: 1761 [2022-11-16 16:14:24,072 INFO L226 Difference]: Without dead ends: 1761 [2022-11-16 16:14:24,073 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 [2022-11-16 16:14:24,075 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:24,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 5 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-11-16 16:14:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1761. [2022-11-16 16:14:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1677 states have (on average 2.7865235539654143) internal successors, (4673), 1760 states have internal predecessors, (4673), 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) [2022-11-16 16:14:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4673 transitions. [2022-11-16 16:14:24,149 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4673 transitions. Word has length 5 [2022-11-16 16:14:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:24,150 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 4673 transitions. [2022-11-16 16:14:24,150 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) [2022-11-16 16:14:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4673 transitions. [2022-11-16 16:14:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:14:24,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:24,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:14:24,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 16:14:24,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1522031030, now seen corresponding path program 1 times [2022-11-16 16:14:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:24,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555307944] [2022-11-16 16:14:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:25,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555307944] [2022-11-16 16:14:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555307944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:25,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:25,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:14:25,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786863854] [2022-11-16 16:14:25,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:25,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:14:25,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:14:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:14:25,565 INFO L87 Difference]: Start difference. First operand 1761 states and 4673 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) [2022-11-16 16:14:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:26,077 INFO L93 Difference]: Finished difference Result 1812 states and 4831 transitions. [2022-11-16 16:14:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:26,078 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 [2022-11-16 16:14:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:26,086 INFO L225 Difference]: With dead ends: 1812 [2022-11-16 16:14:26,086 INFO L226 Difference]: Without dead ends: 1812 [2022-11-16 16:14:26,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:14:26,087 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:26,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:14:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-16 16:14:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1794. [2022-11-16 16:14:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1710 states have (on average 2.7859649122807015) internal successors, (4764), 1793 states have internal predecessors, (4764), 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) [2022-11-16 16:14:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 4764 transitions. [2022-11-16 16:14:26,146 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 4764 transitions. Word has length 5 [2022-11-16 16:14:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 4764 transitions. [2022-11-16 16:14:26,147 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) [2022-11-16 16:14:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 4764 transitions. [2022-11-16 16:14:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:14:26,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:26,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:14:26,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 16:14:26,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1521999576, now seen corresponding path program 1 times [2022-11-16 16:14:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:26,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826776594] [2022-11-16 16:14:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:26,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:26,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826776594] [2022-11-16 16:14:26,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826776594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:26,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:26,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:14:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534034759] [2022-11-16 16:14:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:26,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:14:26,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:14:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:14:26,389 INFO L87 Difference]: Start difference. First operand 1794 states and 4764 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) [2022-11-16 16:14:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:26,629 INFO L93 Difference]: Finished difference Result 1618 states and 4312 transitions. [2022-11-16 16:14:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:14:26,630 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 [2022-11-16 16:14:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:26,636 INFO L225 Difference]: With dead ends: 1618 [2022-11-16 16:14:26,636 INFO L226 Difference]: Without dead ends: 1618 [2022-11-16 16:14:26,637 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 [2022-11-16 16:14:26,637 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:26,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 7 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-11-16 16:14:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1618. [2022-11-16 16:14:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1562 states have (on average 2.76056338028169) internal successors, (4312), 1617 states have internal predecessors, (4312), 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) [2022-11-16 16:14:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 4312 transitions. [2022-11-16 16:14:26,686 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 4312 transitions. Word has length 5 [2022-11-16 16:14:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:26,687 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 4312 transitions. [2022-11-16 16:14:26,687 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) [2022-11-16 16:14:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 4312 transitions. [2022-11-16 16:14:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:14:26,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:26,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:26,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 16:14:26,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1921524417, now seen corresponding path program 1 times [2022-11-16 16:14:26,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062662098] [2022-11-16 16:14:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:26,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:26,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:26,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062662098] [2022-11-16 16:14:26,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062662098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:26,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:26,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306623001] [2022-11-16 16:14:26,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:26,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:26,762 INFO L87 Difference]: Start difference. First operand 1618 states and 4312 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:26,927 INFO L93 Difference]: Finished difference Result 1250 states and 3250 transitions. [2022-11-16 16:14:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:14:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:26,933 INFO L225 Difference]: With dead ends: 1250 [2022-11-16 16:14:26,933 INFO L226 Difference]: Without dead ends: 1246 [2022-11-16 16:14:26,934 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 [2022-11-16 16:14:26,934 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:26,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 13 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-11-16 16:14:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1208. [2022-11-16 16:14:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1171 states have (on average 2.71733561058924) internal successors, (3182), 1207 states have internal predecessors, (3182), 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) [2022-11-16 16:14:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 3182 transitions. [2022-11-16 16:14:26,974 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 3182 transitions. Word has length 7 [2022-11-16 16:14:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:26,975 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 3182 transitions. [2022-11-16 16:14:26,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 3182 transitions. [2022-11-16 16:14:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:14:26,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:26,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:26,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 16:14:26,977 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1636194671, now seen corresponding path program 1 times [2022-11-16 16:14:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326575729] [2022-11-16 16:14:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:26,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:27,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:27,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326575729] [2022-11-16 16:14:27,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326575729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:27,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:27,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454880671] [2022-11-16 16:14:27,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:27,207 INFO L87 Difference]: Start difference. First operand 1208 states and 3182 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:27,329 INFO L93 Difference]: Finished difference Result 1196 states and 3153 transitions. [2022-11-16 16:14:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:14:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:27,336 INFO L225 Difference]: With dead ends: 1196 [2022-11-16 16:14:27,336 INFO L226 Difference]: Without dead ends: 1196 [2022-11-16 16:14:27,336 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 [2022-11-16 16:14:27,337 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:27,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 5 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-16 16:14:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2022-11-16 16:14:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1161 states have (on average 2.7157622739018086) internal successors, (3153), 1195 states have internal predecessors, (3153), 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) [2022-11-16 16:14:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 3153 transitions. [2022-11-16 16:14:27,374 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 3153 transitions. Word has length 10 [2022-11-16 16:14:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:27,374 INFO L495 AbstractCegarLoop]: Abstraction has 1196 states and 3153 transitions. [2022-11-16 16:14:27,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 3153 transitions. [2022-11-16 16:14:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:14:27,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:27,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:27,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 16:14:27,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1636194672, now seen corresponding path program 1 times [2022-11-16 16:14:27,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:27,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496155147] [2022-11-16 16:14:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:27,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:27,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496155147] [2022-11-16 16:14:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496155147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:27,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:27,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:14:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81984954] [2022-11-16 16:14:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:27,497 INFO L87 Difference]: Start difference. First operand 1196 states and 3153 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:27,614 INFO L93 Difference]: Finished difference Result 1094 states and 2892 transitions. [2022-11-16 16:14:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:27,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:14:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:27,619 INFO L225 Difference]: With dead ends: 1094 [2022-11-16 16:14:27,619 INFO L226 Difference]: Without dead ends: 1094 [2022-11-16 16:14:27,619 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 [2022-11-16 16:14:27,620 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:27,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 5 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-16 16:14:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2022-11-16 16:14:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1072 states have (on average 2.6977611940298507) internal successors, (2892), 1093 states have internal predecessors, (2892), 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) [2022-11-16 16:14:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2892 transitions. [2022-11-16 16:14:27,650 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2892 transitions. Word has length 10 [2022-11-16 16:14:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:27,651 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 2892 transitions. [2022-11-16 16:14:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2892 transitions. [2022-11-16 16:14:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:14:27,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:27,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:27,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 16:14:27,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -817571240, now seen corresponding path program 1 times [2022-11-16 16:14:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:27,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20386069] [2022-11-16 16:14:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:27,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20386069] [2022-11-16 16:14:27,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20386069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:27,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:27,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:14:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131478308] [2022-11-16 16:14:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:27,708 INFO L87 Difference]: Start difference. First operand 1094 states and 2892 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-16 16:14:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:27,853 INFO L93 Difference]: Finished difference Result 1094 states and 2880 transitions. [2022-11-16 16:14:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-11-16 16:14:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:27,859 INFO L225 Difference]: With dead ends: 1094 [2022-11-16 16:14:27,859 INFO L226 Difference]: Without dead ends: 1094 [2022-11-16 16:14:27,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:27,860 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:27,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 16 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-16 16:14:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2022-11-16 16:14:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1072 states have (on average 2.6865671641791047) internal successors, (2880), 1093 states have internal predecessors, (2880), 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) [2022-11-16 16:14:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2880 transitions. [2022-11-16 16:14:27,893 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2880 transitions. Word has length 11 [2022-11-16 16:14:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:27,893 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 2880 transitions. [2022-11-16 16:14:27,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-16 16:14:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2880 transitions. [2022-11-16 16:14:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:14:27,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:27,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 16:14:27,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash 294612448, now seen corresponding path program 1 times [2022-11-16 16:14:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724395998] [2022-11-16 16:14:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:28,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:28,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724395998] [2022-11-16 16:14:28,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724395998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:28,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:28,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:14:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394117476] [2022-11-16 16:14:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:14:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:14:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:14:28,825 INFO L87 Difference]: Start difference. First operand 1094 states and 2880 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:29,316 INFO L93 Difference]: Finished difference Result 1093 states and 2877 transitions. [2022-11-16 16:14:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:14:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:14:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:29,321 INFO L225 Difference]: With dead ends: 1093 [2022-11-16 16:14:29,321 INFO L226 Difference]: Without dead ends: 1093 [2022-11-16 16:14:29,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:14:29,322 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:29,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:14:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-16 16:14:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2022-11-16 16:14:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1071 states have (on average 2.6862745098039214) internal successors, (2877), 1092 states have internal predecessors, (2877), 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) [2022-11-16 16:14:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2877 transitions. [2022-11-16 16:14:29,357 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2877 transitions. Word has length 13 [2022-11-16 16:14:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:29,358 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 2877 transitions. [2022-11-16 16:14:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2877 transitions. [2022-11-16 16:14:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:14:29,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:29,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 16:14:29,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash -999639302, now seen corresponding path program 1 times [2022-11-16 16:14:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:29,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786543955] [2022-11-16 16:14:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:30,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786543955] [2022-11-16 16:14:30,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786543955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:30,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:30,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 16:14:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124664894] [2022-11-16 16:14:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:30,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:14:30,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:30,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:14:30,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:14:30,124 INFO L87 Difference]: Start difference. First operand 1093 states and 2877 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:30,627 INFO L93 Difference]: Finished difference Result 1225 states and 3212 transitions. [2022-11-16 16:14:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:14:30,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 16:14:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:30,634 INFO L225 Difference]: With dead ends: 1225 [2022-11-16 16:14:30,634 INFO L226 Difference]: Without dead ends: 1225 [2022-11-16 16:14:30,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:14:30,635 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:30,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 32 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:14:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-16 16:14:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1137. [2022-11-16 16:14:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1115 states have (on average 2.6771300448430493) internal successors, (2985), 1136 states have internal predecessors, (2985), 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) [2022-11-16 16:14:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2985 transitions. [2022-11-16 16:14:30,685 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2985 transitions. Word has length 14 [2022-11-16 16:14:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:30,685 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 2985 transitions. [2022-11-16 16:14:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2985 transitions. [2022-11-16 16:14:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:14:30,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:30,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 16:14:30,687 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash -884797870, now seen corresponding path program 2 times [2022-11-16 16:14:30,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:30,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963010449] [2022-11-16 16:14:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:30,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:31,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:31,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963010449] [2022-11-16 16:14:31,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963010449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:31,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:31,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 16:14:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289309687] [2022-11-16 16:14:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:31,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:14:31,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:14:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:14:31,939 INFO L87 Difference]: Start difference. First operand 1137 states and 2985 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:32,749 INFO L93 Difference]: Finished difference Result 1181 states and 3093 transitions. [2022-11-16 16:14:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:14:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 16:14:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:32,754 INFO L225 Difference]: With dead ends: 1181 [2022-11-16 16:14:32,755 INFO L226 Difference]: Without dead ends: 1181 [2022-11-16 16:14:32,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:14:32,756 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:32,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:14:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-11-16 16:14:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1115. [2022-11-16 16:14:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1093 states have (on average 2.6816102470265326) internal successors, (2931), 1114 states have internal predecessors, (2931), 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) [2022-11-16 16:14:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2931 transitions. [2022-11-16 16:14:32,785 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2931 transitions. Word has length 14 [2022-11-16 16:14:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:32,786 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 2931 transitions. [2022-11-16 16:14:32,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2931 transitions. [2022-11-16 16:14:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:14:32,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:32,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:32,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 16:14:32,788 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1506749136, now seen corresponding path program 3 times [2022-11-16 16:14:32,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:32,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713765882] [2022-11-16 16:14:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:32,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:33,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713765882] [2022-11-16 16:14:33,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713765882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:33,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:33,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 16:14:33,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555163425] [2022-11-16 16:14:33,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:33,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:14:33,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:33,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:14:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:14:33,644 INFO L87 Difference]: Start difference. First operand 1115 states and 2931 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:34,011 INFO L93 Difference]: Finished difference Result 1104 states and 2893 transitions. [2022-11-16 16:14:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:14:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 16:14:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:34,038 INFO L225 Difference]: With dead ends: 1104 [2022-11-16 16:14:34,038 INFO L226 Difference]: Without dead ends: 1104 [2022-11-16 16:14:34,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:14:34,040 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:14:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-16 16:14:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1082. [2022-11-16 16:14:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1060 states have (on average 2.6783018867924526) internal successors, (2839), 1081 states have internal predecessors, (2839), 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) [2022-11-16 16:14:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 2839 transitions. [2022-11-16 16:14:34,070 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 2839 transitions. Word has length 14 [2022-11-16 16:14:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:34,071 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 2839 transitions. [2022-11-16 16:14:34,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 2839 transitions. [2022-11-16 16:14:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:14:34,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:34,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 16:14:34,073 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1995850313, now seen corresponding path program 1 times [2022-11-16 16:14:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420871322] [2022-11-16 16:14:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:35,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420871322] [2022-11-16 16:14:35,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420871322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:35,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:35,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 16:14:35,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978877558] [2022-11-16 16:14:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:35,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 16:14:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 16:14:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:14:35,232 INFO L87 Difference]: Start difference. First operand 1082 states and 2839 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:35,712 INFO L93 Difference]: Finished difference Result 1080 states and 2835 transitions. [2022-11-16 16:14:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:14:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 16:14:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:35,717 INFO L225 Difference]: With dead ends: 1080 [2022-11-16 16:14:35,717 INFO L226 Difference]: Without dead ends: 1080 [2022-11-16 16:14:35,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:14:35,718 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:35,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 36 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:14:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-16 16:14:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-16 16:14:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1058 states have (on average 2.679584120982987) internal successors, (2835), 1079 states have internal predecessors, (2835), 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) [2022-11-16 16:14:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2835 transitions. [2022-11-16 16:14:35,750 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2835 transitions. Word has length 14 [2022-11-16 16:14:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:35,755 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 2835 transitions. [2022-11-16 16:14:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2835 transitions. [2022-11-16 16:14:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:14:35,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:35,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:35,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 16:14:35,757 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash 528751727, now seen corresponding path program 1 times [2022-11-16 16:14:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:35,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091649279] [2022-11-16 16:14:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:37,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091649279] [2022-11-16 16:14:37,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091649279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:37,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:37,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 16:14:37,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150892450] [2022-11-16 16:14:37,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:14:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:14:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:14:37,469 INFO L87 Difference]: Start difference. First operand 1080 states and 2835 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:38,369 INFO L93 Difference]: Finished difference Result 1209 states and 3156 transitions. [2022-11-16 16:14:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:14:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:14:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:38,374 INFO L225 Difference]: With dead ends: 1209 [2022-11-16 16:14:38,374 INFO L226 Difference]: Without dead ends: 1209 [2022-11-16 16:14:38,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:14:38,375 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:38,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 41 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:14:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-11-16 16:14:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1113. [2022-11-16 16:14:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1091 states have (on average 2.6727772685609534) internal successors, (2916), 1112 states have internal predecessors, (2916), 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) [2022-11-16 16:14:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2916 transitions. [2022-11-16 16:14:38,407 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2916 transitions. Word has length 15 [2022-11-16 16:14:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:38,407 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 2916 transitions. [2022-11-16 16:14:38,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2916 transitions. [2022-11-16 16:14:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:14:38,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:38,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:38,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 16:14:38,409 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1784057779, now seen corresponding path program 2 times [2022-11-16 16:14:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110612550] [2022-11-16 16:14:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:39,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:39,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110612550] [2022-11-16 16:14:39,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110612550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:39,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:39,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 16:14:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107261923] [2022-11-16 16:14:39,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:14:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:14:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:14:39,932 INFO L87 Difference]: Start difference. First operand 1113 states and 2916 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:40,763 INFO L93 Difference]: Finished difference Result 1186 states and 3100 transitions. [2022-11-16 16:14:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:14:40,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:14:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:40,768 INFO L225 Difference]: With dead ends: 1186 [2022-11-16 16:14:40,768 INFO L226 Difference]: Without dead ends: 1186 [2022-11-16 16:14:40,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:14:40,769 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:40,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 43 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:14:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-16 16:14:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1091. [2022-11-16 16:14:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1069 states have (on average 2.677268475210477) internal successors, (2862), 1090 states have internal predecessors, (2862), 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) [2022-11-16 16:14:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 2862 transitions. [2022-11-16 16:14:40,800 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 2862 transitions. Word has length 15 [2022-11-16 16:14:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:40,800 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 2862 transitions. [2022-11-16 16:14:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 2862 transitions. [2022-11-16 16:14:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:14:40,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:40,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 16:14:40,802 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1741706509, now seen corresponding path program 3 times [2022-11-16 16:14:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565218064] [2022-11-16 16:14:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:42,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:42,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565218064] [2022-11-16 16:14:42,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565218064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:42,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:42,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 16:14:42,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450798196] [2022-11-16 16:14:42,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:42,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:14:42,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:14:42,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:14:42,039 INFO L87 Difference]: Start difference. First operand 1091 states and 2862 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:42,730 INFO L93 Difference]: Finished difference Result 1130 states and 2965 transitions. [2022-11-16 16:14:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:14:42,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:14:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:42,735 INFO L225 Difference]: With dead ends: 1130 [2022-11-16 16:14:42,735 INFO L226 Difference]: Without dead ends: 1130 [2022-11-16 16:14:42,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:14:42,737 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:42,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 29 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:14:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-11-16 16:14:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1058. [2022-11-16 16:14:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1038 states have (on average 2.679190751445087) internal successors, (2781), 1057 states have internal predecessors, (2781), 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) [2022-11-16 16:14:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2781 transitions. [2022-11-16 16:14:42,770 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2781 transitions. Word has length 15 [2022-11-16 16:14:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:42,771 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 2781 transitions. [2022-11-16 16:14:42,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2781 transitions. [2022-11-16 16:14:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:14:42,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:42,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:42,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 16:14:42,773 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1839458642, now seen corresponding path program 1 times [2022-11-16 16:14:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:42,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173744797] [2022-11-16 16:14:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:43,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:43,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173744797] [2022-11-16 16:14:43,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173744797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:43,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:43,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 16:14:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130859689] [2022-11-16 16:14:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:43,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 16:14:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 16:14:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:14:43,631 INFO L87 Difference]: Start difference. First operand 1058 states and 2781 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:44,142 INFO L93 Difference]: Finished difference Result 1186 states and 3100 transitions. [2022-11-16 16:14:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:14:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 16:14:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:44,146 INFO L225 Difference]: With dead ends: 1186 [2022-11-16 16:14:44,147 INFO L226 Difference]: Without dead ends: 1186 [2022-11-16 16:14:44,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:14:44,148 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:44,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 25 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:14:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-16 16:14:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1156. [2022-11-16 16:14:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1136 states have (on average 2.6778169014084505) internal successors, (3042), 1155 states have internal predecessors, (3042), 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) [2022-11-16 16:14:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3042 transitions. [2022-11-16 16:14:44,179 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3042 transitions. Word has length 16 [2022-11-16 16:14:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:44,180 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 3042 transitions. [2022-11-16 16:14:44,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3042 transitions. [2022-11-16 16:14:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:14:44,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:44,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:44,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 16:14:44,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1323040596, now seen corresponding path program 1 times [2022-11-16 16:14:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:44,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138097533] [2022-11-16 16:14:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:45,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:45,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138097533] [2022-11-16 16:14:45,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138097533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:45,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:45,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 16:14:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998778224] [2022-11-16 16:14:45,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:14:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:14:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:14:45,362 INFO L87 Difference]: Start difference. First operand 1156 states and 3042 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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) [2022-11-16 16:14:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:46,120 INFO L93 Difference]: Finished difference Result 1274 states and 3336 transitions. [2022-11-16 16:14:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:14:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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 17 [2022-11-16 16:14:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:46,125 INFO L225 Difference]: With dead ends: 1274 [2022-11-16 16:14:46,125 INFO L226 Difference]: Without dead ends: 1274 [2022-11-16 16:14:46,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:14:46,126 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 102 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:46,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 29 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:14:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-11-16 16:14:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1145. [2022-11-16 16:14:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1125 states have (on average 2.68) internal successors, (3015), 1144 states have internal predecessors, (3015), 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) [2022-11-16 16:14:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3015 transitions. [2022-11-16 16:14:46,162 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3015 transitions. Word has length 17 [2022-11-16 16:14:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:46,163 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 3015 transitions. [2022-11-16 16:14:46,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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) [2022-11-16 16:14:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3015 transitions. [2022-11-16 16:14:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:14:46,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:46,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:46,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 16:14:46,165 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash 786346392, now seen corresponding path program 2 times [2022-11-16 16:14:46,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:46,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83823061] [2022-11-16 16:14:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:47,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83823061] [2022-11-16 16:14:47,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83823061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:47,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:47,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 16:14:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374796685] [2022-11-16 16:14:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:47,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 16:14:47,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 16:14:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:14:47,525 INFO L87 Difference]: Start difference. First operand 1145 states and 3015 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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) [2022-11-16 16:14:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:48,393 INFO L93 Difference]: Finished difference Result 1196 states and 3145 transitions. [2022-11-16 16:14:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:14:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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 17 [2022-11-16 16:14:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:48,397 INFO L225 Difference]: With dead ends: 1196 [2022-11-16 16:14:48,397 INFO L226 Difference]: Without dead ends: 1196 [2022-11-16 16:14:48,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:14:48,398 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:48,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 33 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:14:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-16 16:14:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1086. [2022-11-16 16:14:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1066 states have (on average 2.6885553470919326) internal successors, (2866), 1085 states have internal predecessors, (2866), 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) [2022-11-16 16:14:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2866 transitions. [2022-11-16 16:14:48,427 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2866 transitions. Word has length 17 [2022-11-16 16:14:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:48,428 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 2866 transitions. [2022-11-16 16:14:48,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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) [2022-11-16 16:14:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2866 transitions. [2022-11-16 16:14:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 16:14:48,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:48,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:48,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 16:14:48,430 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -565672094, now seen corresponding path program 1 times [2022-11-16 16:14:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:48,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870069635] [2022-11-16 16:14:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:49,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870069635] [2022-11-16 16:14:49,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870069635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:49,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:49,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 16:14:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701611088] [2022-11-16 16:14:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:49,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:14:49,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:14:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:14:49,786 INFO L87 Difference]: Start difference. First operand 1086 states and 2866 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-16 16:14:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:50,650 INFO L93 Difference]: Finished difference Result 1292 states and 3375 transitions. [2022-11-16 16:14:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 16:14:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 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 22 [2022-11-16 16:14:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:50,654 INFO L225 Difference]: With dead ends: 1292 [2022-11-16 16:14:50,654 INFO L226 Difference]: Without dead ends: 1292 [2022-11-16 16:14:50,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:14:50,655 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:50,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 32 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 16:14:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-11-16 16:14:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1240. [2022-11-16 16:14:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1220 states have (on average 2.6745901639344263) internal successors, (3263), 1239 states have internal predecessors, (3263), 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) [2022-11-16 16:14:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3263 transitions. [2022-11-16 16:14:50,689 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3263 transitions. Word has length 22 [2022-11-16 16:14:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:50,689 INFO L495 AbstractCegarLoop]: Abstraction has 1240 states and 3263 transitions. [2022-11-16 16:14:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-16 16:14:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3263 transitions. [2022-11-16 16:14:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:14:50,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:50,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:50,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 16:14:50,692 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:50,693 INFO L85 PathProgramCache]: Analyzing trace with hash -226174072, now seen corresponding path program 1 times [2022-11-16 16:14:50,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:50,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814847222] [2022-11-16 16:14:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:50,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:52,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:52,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814847222] [2022-11-16 16:14:52,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814847222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:52,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:52,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 16:14:52,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87872542] [2022-11-16 16:14:52,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:52,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:14:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:14:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:14:52,475 INFO L87 Difference]: Start difference. First operand 1240 states and 3263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2022-11-16 16:14:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:53,659 INFO L93 Difference]: Finished difference Result 1424 states and 3719 transitions. [2022-11-16 16:14:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 16:14:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 23 [2022-11-16 16:14:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:53,664 INFO L225 Difference]: With dead ends: 1424 [2022-11-16 16:14:53,664 INFO L226 Difference]: Without dead ends: 1424 [2022-11-16 16:14:53,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-11-16 16:14:53,665 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 209 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:53,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 35 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:14:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-11-16 16:14:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1229. [2022-11-16 16:14:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1209 states have (on average 2.6765922249793217) internal successors, (3236), 1228 states have internal predecessors, (3236), 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) [2022-11-16 16:14:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3236 transitions. [2022-11-16 16:14:53,700 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3236 transitions. Word has length 23 [2022-11-16 16:14:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:53,701 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 3236 transitions. [2022-11-16 16:14:53,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2022-11-16 16:14:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3236 transitions. [2022-11-16 16:14:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:14:53,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:53,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:53,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 16:14:53,704 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1801571020, now seen corresponding path program 2 times [2022-11-16 16:14:53,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:53,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603377790] [2022-11-16 16:14:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:53,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:53,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:53,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603377790] [2022-11-16 16:14:53,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603377790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:53,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:53,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:14:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910014172] [2022-11-16 16:14:53,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:53,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:14:53,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:14:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:14:53,963 INFO L87 Difference]: Start difference. First operand 1229 states and 3236 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-11-16 16:14:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:54,156 INFO L93 Difference]: Finished difference Result 1580 states and 4140 transitions. [2022-11-16 16:14:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:14:54,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2022-11-16 16:14:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:54,161 INFO L225 Difference]: With dead ends: 1580 [2022-11-16 16:14:54,162 INFO L226 Difference]: Without dead ends: 1580 [2022-11-16 16:14:54,162 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 [2022-11-16 16:14:54,162 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:54,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 8 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-11-16 16:14:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1414. [2022-11-16 16:14:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1394 states have (on average 2.66857962697274) internal successors, (3720), 1413 states have internal predecessors, (3720), 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) [2022-11-16 16:14:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 3720 transitions. [2022-11-16 16:14:54,199 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 3720 transitions. Word has length 23 [2022-11-16 16:14:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:54,199 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 3720 transitions. [2022-11-16 16:14:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-11-16 16:14:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 3720 transitions. [2022-11-16 16:14:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 16:14:54,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:54,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:54,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 16:14:54,203 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1011575651, now seen corresponding path program 1 times [2022-11-16 16:14:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235057685] [2022-11-16 16:14:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:54,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235057685] [2022-11-16 16:14:54,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235057685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:54,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:54,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:14:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386852536] [2022-11-16 16:14:54,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:54,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:54,265 INFO L87 Difference]: Start difference. First operand 1414 states and 3720 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-11-16 16:14:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:54,416 INFO L93 Difference]: Finished difference Result 899 states and 2273 transitions. [2022-11-16 16:14:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2022-11-16 16:14:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:54,420 INFO L225 Difference]: With dead ends: 899 [2022-11-16 16:14:54,420 INFO L226 Difference]: Without dead ends: 850 [2022-11-16 16:14:54,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:54,421 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:54,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-16 16:14:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 791. [2022-11-16 16:14:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 776 states have (on average 2.570876288659794) internal successors, (1995), 790 states have internal predecessors, (1995), 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) [2022-11-16 16:14:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1995 transitions. [2022-11-16 16:14:54,442 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1995 transitions. Word has length 26 [2022-11-16 16:14:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:54,443 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1995 transitions. [2022-11-16 16:14:54,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-11-16 16:14:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1995 transitions. [2022-11-16 16:14:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 16:14:54,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:54,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:54,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-16 16:14:54,446 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:54,446 INFO L85 PathProgramCache]: Analyzing trace with hash -526888523, now seen corresponding path program 1 times [2022-11-16 16:14:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083650750] [2022-11-16 16:14:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:14:54,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:54,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083650750] [2022-11-16 16:14:54,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083650750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:54,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:54,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:14:54,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320331008] [2022-11-16 16:14:54,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:54,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:54,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:54,526 INFO L87 Difference]: Start difference. First operand 791 states and 1995 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-16 16:14:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:54,703 INFO L93 Difference]: Finished difference Result 1257 states and 3184 transitions. [2022-11-16 16:14:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2022-11-16 16:14:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:54,707 INFO L225 Difference]: With dead ends: 1257 [2022-11-16 16:14:54,707 INFO L226 Difference]: Without dead ends: 1257 [2022-11-16 16:14:54,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:54,708 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:54,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 19 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:14:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-11-16 16:14:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 879. [2022-11-16 16:14:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 864 states have (on average 2.6608796296296298) internal successors, (2299), 878 states have internal predecessors, (2299), 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) [2022-11-16 16:14:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2299 transitions. [2022-11-16 16:14:54,734 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2299 transitions. Word has length 27 [2022-11-16 16:14:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:54,734 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 2299 transitions. [2022-11-16 16:14:54,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-16 16:14:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2299 transitions. [2022-11-16 16:14:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 16:14:54,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:54,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:54,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-16 16:14:54,737 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1147091493, now seen corresponding path program 1 times [2022-11-16 16:14:54,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:54,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020198165] [2022-11-16 16:14:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:54,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:14:54,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020198165] [2022-11-16 16:14:54,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020198165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:54,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:54,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:14:54,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655070718] [2022-11-16 16:14:54,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:54,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:54,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:54,893 INFO L87 Difference]: Start difference. First operand 879 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-11-16 16:14:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:55,022 INFO L93 Difference]: Finished difference Result 621 states and 1370 transitions. [2022-11-16 16:14:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2022-11-16 16:14:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:55,024 INFO L225 Difference]: With dead ends: 621 [2022-11-16 16:14:55,025 INFO L226 Difference]: Without dead ends: 605 [2022-11-16 16:14:55,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:14:55,025 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:55,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-16 16:14:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2022-11-16 16:14:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 597 states have (on average 2.2328308207705194) internal successors, (1333), 604 states have internal predecessors, (1333), 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) [2022-11-16 16:14:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1333 transitions. [2022-11-16 16:14:55,040 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1333 transitions. Word has length 29 [2022-11-16 16:14:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:55,041 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1333 transitions. [2022-11-16 16:14:55,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-11-16 16:14:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1333 transitions. [2022-11-16 16:14:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 16:14:55,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:55,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 16:14:55,043 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1484256437, now seen corresponding path program 2 times [2022-11-16 16:14:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:55,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888635446] [2022-11-16 16:14:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:55,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:14:55,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888635446] [2022-11-16 16:14:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888635446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:14:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988731861] [2022-11-16 16:14:55,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:14:55,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:55,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:55,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:14:55,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 16:14:55,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:14:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:14:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:14:55,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:14:55,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988731861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:55,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:14:55,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-16 16:14:55,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567557655] [2022-11-16 16:14:55,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:55,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:14:55,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:14:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:14:55,927 INFO L87 Difference]: Start difference. First operand 605 states and 1333 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-16 16:14:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:55,990 INFO L93 Difference]: Finished difference Result 634 states and 1397 transitions. [2022-11-16 16:14:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:14:55,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2022-11-16 16:14:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:55,993 INFO L225 Difference]: With dead ends: 634 [2022-11-16 16:14:55,993 INFO L226 Difference]: Without dead ends: 577 [2022-11-16 16:14:55,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:14:55,994 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:55,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-11-16 16:14:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-16 16:14:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-11-16 16:14:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 569 states have (on average 2.2003514938488578) internal successors, (1252), 576 states have internal predecessors, (1252), 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) [2022-11-16 16:14:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1252 transitions. [2022-11-16 16:14:56,008 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1252 transitions. Word has length 29 [2022-11-16 16:14:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:56,009 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 1252 transitions. [2022-11-16 16:14:56,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-16 16:14:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1252 transitions. [2022-11-16 16:14:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 16:14:56,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:56,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:56,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 16:14:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2445dee3-8741-490a-98ff-02d735fca2fc/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 16:14:56,217 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1031755725, now seen corresponding path program 1 times [2022-11-16 16:14:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120075411] [2022-11-16 16:14:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:58,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120075411] [2022-11-16 16:14:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120075411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:58,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 16:14:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229960368] [2022-11-16 16:14:58,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:58,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:14:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:58,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:14:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:14:58,212 INFO L87 Difference]: Start difference. First operand 577 states and 1252 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2022-11-16 16:14:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:59,488 INFO L93 Difference]: Finished difference Result 762 states and 1657 transitions. [2022-11-16 16:14:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 16:14:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) Word has length 30 [2022-11-16 16:14:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:59,491 INFO L225 Difference]: With dead ends: 762 [2022-11-16 16:14:59,491 INFO L226 Difference]: Without dead ends: 762 [2022-11-16 16:14:59,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:14:59,492 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 136 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:59,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 64 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 16:14:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-16 16:14:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 517. [2022-11-16 16:14:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 509 states have (on average 2.2102161100196462) internal successors, (1125), 516 states have internal predecessors, (1125), 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) [2022-11-16 16:14:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1125 transitions. [2022-11-16 16:14:59,506 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1125 transitions. Word has length 30 [2022-11-16 16:14:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:59,506 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 1125 transitions. [2022-11-16 16:14:59,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2022-11-16 16:14:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1125 transitions. [2022-11-16 16:14:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 16:14:59,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:59,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:59,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 16:14:59,509 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:14:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 431285843, now seen corresponding path program 2 times [2022-11-16 16:14:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702718626] [2022-11-16 16:14:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:15:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:00,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:15:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702718626] [2022-11-16 16:15:00,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702718626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:15:00,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:15:00,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 16:15:00,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629808165] [2022-11-16 16:15:00,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:15:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 16:15:00,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:00,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 16:15:00,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:15:00,827 INFO L87 Difference]: Start difference. First operand 517 states and 1125 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2022-11-16 16:15:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:01,895 INFO L93 Difference]: Finished difference Result 517 states and 1120 transitions. [2022-11-16 16:15:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 16:15:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) Word has length 30 [2022-11-16 16:15:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:01,897 INFO L225 Difference]: With dead ends: 517 [2022-11-16 16:15:01,897 INFO L226 Difference]: Without dead ends: 517 [2022-11-16 16:15:01,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-16 16:15:01,898 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:01,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 38 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 16:15:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-16 16:15:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 492. [2022-11-16 16:15:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 484 states have (on average 2.2107438016528924) internal successors, (1070), 491 states have internal predecessors, (1070), 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) [2022-11-16 16:15:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1070 transitions. [2022-11-16 16:15:01,908 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1070 transitions. Word has length 30 [2022-11-16 16:15:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:01,909 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 1070 transitions. [2022-11-16 16:15:01,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2022-11-16 16:15:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1070 transitions. [2022-11-16 16:15:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 16:15:01,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:01,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:01,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-16 16:15:01,911 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-16 16:15:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash 986435019, now seen corresponding path program 1 times [2022-11-16 16:15:01,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:01,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514455781] [2022-11-16 16:15:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat