./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9 --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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- 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-6b4ec56 [2022-11-20 20:50:09,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:50:09,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:50:09,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:50:09,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:50:09,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:50:09,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:50:09,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:50:09,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:50:09,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:50:09,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:50:09,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:50:09,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:50:09,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:50:09,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:50:09,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:50:09,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:50:09,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:50:09,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:50:09,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:50:09,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:50:09,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:50:09,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:50:09,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:50:09,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:50:09,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:50:09,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:50:09,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:50:09,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:50:09,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:50:09,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:50:09,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:50:09,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:50:09,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:50:09,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:50:09,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:50:09,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:50:09,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:50:09,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:50:09,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:50:09,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:50:09,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:50:09,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:50:09,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:50:09,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:50:09,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:50:09,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:50:09,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:50:09,163 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:50:09,167 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:50:09,167 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:50:09,167 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:50:09,168 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:50:09,168 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:50:09,169 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:50:09,169 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:50:09,169 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:50:09,169 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:50:09,170 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:50:09,170 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:50:09,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:50:09,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:50:09,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:50:09,171 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:50:09,172 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:50:09,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:50:09,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:50:09,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:50:09,173 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:50:09,174 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:50:09,174 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:50:09,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:50:09,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:50:09,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:50:09,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:50:09,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:50:09,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:50:09,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:50:09,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:50:09,176 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:50:09,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:50:09,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:50:09,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:50:09,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:50:09,178 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_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2022-11-20 20:50:09,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:50:09,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:50:09,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:50:09,501 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:50:09,502 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:50:09,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-11-20 20:50:12,605 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:50:12,909 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:50:12,910 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-11-20 20:50:12,929 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/data/ace5f18d4/8391956aef8b4b6aba7220c19b613683/FLAGf08e14078 [2022-11-20 20:50:12,955 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/data/ace5f18d4/8391956aef8b4b6aba7220c19b613683 [2022-11-20 20:50:12,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:50:12,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:50:12,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:50:12,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:50:12,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:50:12,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:50:12" (1/1) ... [2022-11-20 20:50:12,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22afa2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:12, skipping insertion in model container [2022-11-20 20:50:12,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:50:12" (1/1) ... [2022-11-20 20:50:12,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:50:13,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:50:13,408 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-11-20 20:50:13,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:50:13,434 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:50:13,495 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-11-20 20:50:13,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:50:13,541 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:50:13,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13 WrapperNode [2022-11-20 20:50:13,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:50:13,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:50:13,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:50:13,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:50:13,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,619 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 125 [2022-11-20 20:50:13,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:50:13,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:50:13,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:50:13,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:50:13,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,668 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:50:13,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:50:13,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:50:13,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:50:13,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (1/1) ... [2022-11-20 20:50:13,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:50:13,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:13,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:50:13,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6444aec6-0010-426d-9257-721bacbd6297/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:50:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:50:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-20 20:50:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-20 20:50:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-20 20:50:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-20 20:50:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:50:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:50:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:50:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:50:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:50:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:50:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:50:13,788 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:50:13,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:50:14,008 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:50:14,385 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:50:14,634 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:50:14,635 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:50:14,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:50:14 BoogieIcfgContainer [2022-11-20 20:50:14,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:50:14,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:50:14,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:50:14,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:50:14,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:50:12" (1/3) ... [2022-11-20 20:50:14,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d33f5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:50:14, skipping insertion in model container [2022-11-20 20:50:14,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:13" (2/3) ... [2022-11-20 20:50:14,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d33f5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:50:14, skipping insertion in model container [2022-11-20 20:50:14,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:50:14" (3/3) ... [2022-11-20 20:50:14,660 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2022-11-20 20:50:14,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:50:14,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-20 20:50:14,697 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:50:14,810 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:50:14,852 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:50:14,870 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 112 transitions, 234 flow [2022-11-20 20:50:14,875 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 112 transitions, 234 flow [2022-11-20 20:50:14,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 112 transitions, 234 flow [2022-11-20 20:50:14,969 INFO L130 PetriNetUnfolder]: 6/127 cut-off events. [2022-11-20 20:50:14,969 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 20:50:14,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 127 events. 6/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 278 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 105. Up to 4 conditions per place. [2022-11-20 20:50:14,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 4364 [2022-11-20 20:50:19,796 INFO L134 LiptonReduction]: Checked pairs total: 12858 [2022-11-20 20:50:19,796 INFO L136 LiptonReduction]: Total number of compositions: 144 [2022-11-20 20:50:19,804 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 53 transitions, 116 flow [2022-11-20 20:50:19,920 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2900 states, 2009 states have (on average 4.103534096565456) internal successors, (8244), 2899 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:19,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:50:19,949 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;@5842233f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:50:19,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-20 20:50:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 2900 states, 2009 states have (on average 4.103534096565456) internal successors, (8244), 2899 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 20:50:19,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:19,984 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 20:50:19,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:19,991 INFO L85 PathProgramCache]: Analyzing trace with hash 724, now seen corresponding path program 1 times [2022-11-20 20:50:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094101654] [2022-11-20 20:50:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:20,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:20,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094101654] [2022-11-20 20:50:20,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094101654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:20,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:20,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 20:50:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181086973] [2022-11-20 20:50:20,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:20,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:50:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:50:20,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:50:20,159 INFO L87 Difference]: Start difference. First operand has 2900 states, 2009 states have (on average 4.103534096565456) internal successors, (8244), 2899 states have internal predecessors, (8244), 0 states have call successors, (0), 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) [2022-11-20 20:50:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:20,279 INFO L93 Difference]: Finished difference Result 857 states and 2387 transitions. [2022-11-20 20:50:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:50:20,281 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 [2022-11-20 20:50:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:20,301 INFO L225 Difference]: With dead ends: 857 [2022-11-20 20:50:20,301 INFO L226 Difference]: Without dead ends: 857 [2022-11-20 20:50:20,302 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 [2022-11-20 20:50:20,305 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:20,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-20 20:50:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 857. [2022-11-20 20:50:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 742 states have (on average 3.2169811320754715) internal successors, (2387), 856 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2387 transitions. [2022-11-20 20:50:20,391 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2387 transitions. Word has length 1 [2022-11-20 20:50:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:20,391 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 2387 transitions. [2022-11-20 20:50:20,391 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) [2022-11-20 20:50:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2387 transitions. [2022-11-20 20:50:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:50:20,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:20,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:50:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:50:20,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash 22180785, now seen corresponding path program 1 times [2022-11-20 20:50:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:20,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567419063] [2022-11-20 20:50:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:20,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567419063] [2022-11-20 20:50:20,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567419063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:20,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:20,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595849637] [2022-11-20 20:50:20,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:20,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:20,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:20,564 INFO L87 Difference]: Start difference. First operand 857 states and 2387 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) [2022-11-20 20:50:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:20,643 INFO L93 Difference]: Finished difference Result 713 states and 1964 transitions. [2022-11-20 20:50:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:20,644 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 [2022-11-20 20:50:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:20,649 INFO L225 Difference]: With dead ends: 713 [2022-11-20 20:50:20,651 INFO L226 Difference]: Without dead ends: 713 [2022-11-20 20:50:20,652 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 [2022-11-20 20:50:20,655 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:20,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-20 20:50:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2022-11-20 20:50:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 638 states have (on average 3.0783699059561127) internal successors, (1964), 712 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1964 transitions. [2022-11-20 20:50:20,697 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1964 transitions. Word has length 4 [2022-11-20 20:50:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:20,698 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1964 transitions. [2022-11-20 20:50:20,698 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) [2022-11-20 20:50:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1964 transitions. [2022-11-20 20:50:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:50:20,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:20,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:50:20,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:50:20,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 22180786, now seen corresponding path program 1 times [2022-11-20 20:50:20,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113301164] [2022-11-20 20:50:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:20,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113301164] [2022-11-20 20:50:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113301164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:20,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:20,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787534904] [2022-11-20 20:50:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:20,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:20,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:20,880 INFO L87 Difference]: Start difference. First operand 713 states and 1964 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) [2022-11-20 20:50:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:20,930 INFO L93 Difference]: Finished difference Result 569 states and 1541 transitions. [2022-11-20 20:50:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:20,931 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 [2022-11-20 20:50:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:20,935 INFO L225 Difference]: With dead ends: 569 [2022-11-20 20:50:20,935 INFO L226 Difference]: Without dead ends: 569 [2022-11-20 20:50:20,935 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 [2022-11-20 20:50:20,937 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:20,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-20 20:50:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-11-20 20:50:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 534 states have (on average 2.885767790262172) internal successors, (1541), 568 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1541 transitions. [2022-11-20 20:50:20,957 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1541 transitions. Word has length 4 [2022-11-20 20:50:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:20,958 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 1541 transitions. [2022-11-20 20:50:20,958 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) [2022-11-20 20:50:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1541 transitions. [2022-11-20 20:50:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:50:20,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:20,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:50:20,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:50:20,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash 22178710, now seen corresponding path program 1 times [2022-11-20 20:50:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:20,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260069151] [2022-11-20 20:50:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:21,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:21,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260069151] [2022-11-20 20:50:21,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260069151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:21,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:21,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985129610] [2022-11-20 20:50:21,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:21,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:21,053 INFO L87 Difference]: Start difference. First operand 569 states and 1541 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) [2022-11-20 20:50:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:21,101 INFO L93 Difference]: Finished difference Result 359 states and 968 transitions. [2022-11-20 20:50:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:21,102 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 [2022-11-20 20:50:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:21,105 INFO L225 Difference]: With dead ends: 359 [2022-11-20 20:50:21,105 INFO L226 Difference]: Without dead ends: 359 [2022-11-20 20:50:21,105 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 [2022-11-20 20:50:21,106 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:21,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-20 20:50:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2022-11-20 20:50:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 347 states have (on average 2.7896253602305476) internal successors, (968), 358 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 968 transitions. [2022-11-20 20:50:21,120 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 968 transitions. Word has length 4 [2022-11-20 20:50:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:21,120 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 968 transitions. [2022-11-20 20:50:21,120 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) [2022-11-20 20:50:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 968 transitions. [2022-11-20 20:50:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:50:21,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:21,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:50:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:50:21,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 22178711, now seen corresponding path program 1 times [2022-11-20 20:50:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:21,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817672385] [2022-11-20 20:50:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:21,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817672385] [2022-11-20 20:50:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817672385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:21,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:21,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637599455] [2022-11-20 20:50:21,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:21,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:21,344 INFO L87 Difference]: Start difference. First operand 359 states and 968 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) [2022-11-20 20:50:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:21,381 INFO L93 Difference]: Finished difference Result 197 states and 527 transitions. [2022-11-20 20:50:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:21,382 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 [2022-11-20 20:50:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:21,383 INFO L225 Difference]: With dead ends: 197 [2022-11-20 20:50:21,383 INFO L226 Difference]: Without dead ends: 197 [2022-11-20 20:50:21,384 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 [2022-11-20 20:50:21,385 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:21,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-20 20:50:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-20 20:50:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.688775510204082) internal successors, (527), 196 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 527 transitions. [2022-11-20 20:50:21,392 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 527 transitions. Word has length 4 [2022-11-20 20:50:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:21,393 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 527 transitions. [2022-11-20 20:50:21,393 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) [2022-11-20 20:50:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 527 transitions. [2022-11-20 20:50:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:50:21,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:21,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:50:21,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:50:21,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:21,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash 687540728, now seen corresponding path program 1 times [2022-11-20 20:50:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:21,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802287585] [2022-11-20 20:50:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:21,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:21,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802287585] [2022-11-20 20:50:21,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802287585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:21,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:21,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309609209] [2022-11-20 20:50:21,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:21,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:21,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:21,460 INFO L87 Difference]: Start difference. First operand 197 states and 527 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) [2022-11-20 20:50:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:21,501 INFO L93 Difference]: Finished difference Result 202 states and 523 transitions. [2022-11-20 20:50:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:21,502 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 [2022-11-20 20:50:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:21,504 INFO L225 Difference]: With dead ends: 202 [2022-11-20 20:50:21,504 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 20:50:21,504 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 [2022-11-20 20:50:21,508 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:21,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 20:50:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-11-20 20:50:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.601990049751244) internal successors, (523), 201 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 523 transitions. [2022-11-20 20:50:21,516 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 523 transitions. Word has length 5 [2022-11-20 20:50:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:21,517 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 523 transitions. [2022-11-20 20:50:21,517 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) [2022-11-20 20:50:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 523 transitions. [2022-11-20 20:50:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:50:21,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:21,518 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:50:21,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 20:50:21,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1737973075, now seen corresponding path program 1 times [2022-11-20 20:50:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426134725] [2022-11-20 20:50:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:21,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:50:21,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:50:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:50:21,578 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:50:21,580 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:50:21,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (56 of 57 remaining) [2022-11-20 20:50:21,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 57 remaining) [2022-11-20 20:50:21,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 57 remaining) [2022-11-20 20:50:21,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 57 remaining) [2022-11-20 20:50:21,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 57 remaining) [2022-11-20 20:50:21,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 57 remaining) [2022-11-20 20:50:21,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 57 remaining) [2022-11-20 20:50:21,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 57 remaining) [2022-11-20 20:50:21,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 57 remaining) [2022-11-20 20:50:21,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 57 remaining) [2022-11-20 20:50:21,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 57 remaining) [2022-11-20 20:50:21,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 57 remaining) [2022-11-20 20:50:21,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 57 remaining) [2022-11-20 20:50:21,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 57 remaining) [2022-11-20 20:50:21,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 57 remaining) [2022-11-20 20:50:21,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 57 remaining) [2022-11-20 20:50:21,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 57 remaining) [2022-11-20 20:50:21,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 57 remaining) [2022-11-20 20:50:21,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 57 remaining) [2022-11-20 20:50:21,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 57 remaining) [2022-11-20 20:50:21,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 57 remaining) [2022-11-20 20:50:21,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (35 of 57 remaining) [2022-11-20 20:50:21,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 57 remaining) [2022-11-20 20:50:21,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 57 remaining) [2022-11-20 20:50:21,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 57 remaining) [2022-11-20 20:50:21,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 57 remaining) [2022-11-20 20:50:21,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 57 remaining) [2022-11-20 20:50:21,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 57 remaining) [2022-11-20 20:50:21,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (28 of 57 remaining) [2022-11-20 20:50:21,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 57 remaining) [2022-11-20 20:50:21,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 57 remaining) [2022-11-20 20:50:21,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (25 of 57 remaining) [2022-11-20 20:50:21,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 57 remaining) [2022-11-20 20:50:21,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 57 remaining) [2022-11-20 20:50:21,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 57 remaining) [2022-11-20 20:50:21,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 57 remaining) [2022-11-20 20:50:21,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 57 remaining) [2022-11-20 20:50:21,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 57 remaining) [2022-11-20 20:50:21,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 57 remaining) [2022-11-20 20:50:21,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 57 remaining) [2022-11-20 20:50:21,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 57 remaining) [2022-11-20 20:50:21,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 57 remaining) [2022-11-20 20:50:21,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 57 remaining) [2022-11-20 20:50:21,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 57 remaining) [2022-11-20 20:50:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 57 remaining) [2022-11-20 20:50:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 57 remaining) [2022-11-20 20:50:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 57 remaining) [2022-11-20 20:50:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 57 remaining) [2022-11-20 20:50:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 57 remaining) [2022-11-20 20:50:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 57 remaining) [2022-11-20 20:50:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 57 remaining) [2022-11-20 20:50:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 57 remaining) [2022-11-20 20:50:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (4 of 57 remaining) [2022-11-20 20:50:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 57 remaining) [2022-11-20 20:50:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 57 remaining) [2022-11-20 20:50:21,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 57 remaining) [2022-11-20 20:50:21,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 57 remaining) [2022-11-20 20:50:21,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:50:21,609 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:21,611 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:50:21,611 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 20:50:21,682 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:50:21,696 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:50:21,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 178 transitions, 380 flow [2022-11-20 20:50:21,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 178 transitions, 380 flow [2022-11-20 20:50:21,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 178 transitions, 380 flow [2022-11-20 20:50:21,764 INFO L130 PetriNetUnfolder]: 8/189 cut-off events. [2022-11-20 20:50:21,764 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 20:50:21,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 189 events. 8/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 581 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 198. Up to 6 conditions per place. [2022-11-20 20:50:21,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 11630 [2022-11-20 20:50:29,573 INFO L134 LiptonReduction]: Checked pairs total: 68307 [2022-11-20 20:50:29,574 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-11-20 20:50:29,575 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 108 places, 103 transitions, 230 flow [2022-11-20 20:50:34,377 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109327 states, 94155 states have (on average 4.565439966013488) internal successors, (429859), 109326 states have internal predecessors, (429859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:34,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:50:34,392 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;@5842233f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:50:34,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-11-20 20:50:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 109327 states, 94155 states have (on average 4.565439966013488) internal successors, (429859), 109326 states have internal predecessors, (429859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 20:50:34,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:34,566 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 20:50:34,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1204, now seen corresponding path program 1 times [2022-11-20 20:50:34,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:34,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960372810] [2022-11-20 20:50:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:34,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:34,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960372810] [2022-11-20 20:50:34,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960372810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:34,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:34,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 20:50:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985709556] [2022-11-20 20:50:34,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:50:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:50:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:50:34,780 INFO L87 Difference]: Start difference. First operand has 109327 states, 94155 states have (on average 4.565439966013488) internal successors, (429859), 109326 states have internal predecessors, (429859), 0 states have call successors, (0), 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) [2022-11-20 20:50:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:35,548 INFO L93 Difference]: Finished difference Result 23825 states and 90911 transitions. [2022-11-20 20:50:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:50:35,551 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 [2022-11-20 20:50:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:35,807 INFO L225 Difference]: With dead ends: 23825 [2022-11-20 20:50:35,808 INFO L226 Difference]: Without dead ends: 23825 [2022-11-20 20:50:35,808 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 [2022-11-20 20:50:35,809 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:35,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23825 states. [2022-11-20 20:50:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23825 to 23825. [2022-11-20 20:50:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23825 states, 23010 states have (on average 3.9509343763581053) internal successors, (90911), 23824 states have internal predecessors, (90911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23825 states to 23825 states and 90911 transitions. [2022-11-20 20:50:37,404 INFO L78 Accepts]: Start accepts. Automaton has 23825 states and 90911 transitions. Word has length 1 [2022-11-20 20:50:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:37,404 INFO L495 AbstractCegarLoop]: Abstraction has 23825 states and 90911 transitions. [2022-11-20 20:50:37,404 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) [2022-11-20 20:50:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23825 states and 90911 transitions. [2022-11-20 20:50:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:50:37,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:37,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:50:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:50:37,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 36861740, now seen corresponding path program 1 times [2022-11-20 20:50:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690507359] [2022-11-20 20:50:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:37,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:37,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:37,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690507359] [2022-11-20 20:50:37,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690507359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:37,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:37,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:37,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055944901] [2022-11-20 20:50:37,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:37,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:37,473 INFO L87 Difference]: Start difference. First operand 23825 states and 90911 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) [2022-11-20 20:50:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:37,872 INFO L93 Difference]: Finished difference Result 13260 states and 50486 transitions. [2022-11-20 20:50:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:37,873 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 [2022-11-20 20:50:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:37,967 INFO L225 Difference]: With dead ends: 13260 [2022-11-20 20:50:37,968 INFO L226 Difference]: Without dead ends: 13260 [2022-11-20 20:50:37,968 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 [2022-11-20 20:50:37,969 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:37,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:50:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13260 states. [2022-11-20 20:50:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13260 to 13260. [2022-11-20 20:50:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 13086 states have (on average 3.8580162005196392) internal successors, (50486), 13259 states have internal predecessors, (50486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 50486 transitions. [2022-11-20 20:50:38,680 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 50486 transitions. Word has length 4 [2022-11-20 20:50:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:38,681 INFO L495 AbstractCegarLoop]: Abstraction has 13260 states and 50486 transitions. [2022-11-20 20:50:38,681 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) [2022-11-20 20:50:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 50486 transitions. [2022-11-20 20:50:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:50:38,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:38,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:50:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:50:38,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 36861741, now seen corresponding path program 1 times [2022-11-20 20:50:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750018430] [2022-11-20 20:50:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:38,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:38,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750018430] [2022-11-20 20:50:38,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750018430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:38,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:38,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754508546] [2022-11-20 20:50:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:38,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:38,799 INFO L87 Difference]: Start difference. First operand 13260 states and 50486 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) [2022-11-20 20:50:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:38,926 INFO L93 Difference]: Finished difference Result 6337 states and 24047 transitions. [2022-11-20 20:50:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:38,927 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 [2022-11-20 20:50:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:38,973 INFO L225 Difference]: With dead ends: 6337 [2022-11-20 20:50:38,973 INFO L226 Difference]: Without dead ends: 6337 [2022-11-20 20:50:38,974 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 [2022-11-20 20:50:38,974 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:38,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 17 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2022-11-20 20:50:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 6337. [2022-11-20 20:50:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 6330 states have (on average 3.7988941548183255) internal successors, (24047), 6336 states have internal predecessors, (24047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 24047 transitions. [2022-11-20 20:50:39,281 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 24047 transitions. Word has length 4 [2022-11-20 20:50:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:39,282 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 24047 transitions. [2022-11-20 20:50:39,282 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) [2022-11-20 20:50:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 24047 transitions. [2022-11-20 20:50:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:50:39,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:39,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:50:39,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:50:39,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1142715043, now seen corresponding path program 1 times [2022-11-20 20:50:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:39,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123942154] [2022-11-20 20:50:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:39,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:39,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123942154] [2022-11-20 20:50:39,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123942154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:39,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:39,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146054098] [2022-11-20 20:50:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:39,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:39,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:39,321 INFO L87 Difference]: Start difference. First operand 6337 states and 24047 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) [2022-11-20 20:50:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:39,639 INFO L93 Difference]: Finished difference Result 6470 states and 24326 transitions. [2022-11-20 20:50:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:39,640 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 [2022-11-20 20:50:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:39,685 INFO L225 Difference]: With dead ends: 6470 [2022-11-20 20:50:39,685 INFO L226 Difference]: Without dead ends: 6470 [2022-11-20 20:50:39,685 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 [2022-11-20 20:50:39,686 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:39,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:50:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6470 states. [2022-11-20 20:50:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6470 to 6470. [2022-11-20 20:50:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6470 states, 6465 states have (on average 3.762722351121423) internal successors, (24326), 6469 states have internal predecessors, (24326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6470 states to 6470 states and 24326 transitions. [2022-11-20 20:50:39,937 INFO L78 Accepts]: Start accepts. Automaton has 6470 states and 24326 transitions. Word has length 5 [2022-11-20 20:50:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:39,938 INFO L495 AbstractCegarLoop]: Abstraction has 6470 states and 24326 transitions. [2022-11-20 20:50:39,938 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) [2022-11-20 20:50:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6470 states and 24326 transitions. [2022-11-20 20:50:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:50:39,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:39,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:50:39,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:50:39,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1142558491, now seen corresponding path program 1 times [2022-11-20 20:50:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:39,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843144902] [2022-11-20 20:50:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:39,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843144902] [2022-11-20 20:50:39,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843144902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:39,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:39,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835808626] [2022-11-20 20:50:39,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:39,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:39,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:39,990 INFO L87 Difference]: Start difference. First operand 6470 states and 24326 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) [2022-11-20 20:50:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:40,085 INFO L93 Difference]: Finished difference Result 5536 states and 20699 transitions. [2022-11-20 20:50:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:40,086 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 [2022-11-20 20:50:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:40,121 INFO L225 Difference]: With dead ends: 5536 [2022-11-20 20:50:40,121 INFO L226 Difference]: Without dead ends: 5536 [2022-11-20 20:50:40,121 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 [2022-11-20 20:50:40,122 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:40,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2022-11-20 20:50:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 5536. [2022-11-20 20:50:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5536 states, 5533 states have (on average 3.7410084944876196) internal successors, (20699), 5535 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5536 states to 5536 states and 20699 transitions. [2022-11-20 20:50:40,333 INFO L78 Accepts]: Start accepts. Automaton has 5536 states and 20699 transitions. Word has length 5 [2022-11-20 20:50:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:40,333 INFO L495 AbstractCegarLoop]: Abstraction has 5536 states and 20699 transitions. [2022-11-20 20:50:40,334 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) [2022-11-20 20:50:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5536 states and 20699 transitions. [2022-11-20 20:50:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:50:40,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:40,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:50:40,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:50:40,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1142558492, now seen corresponding path program 1 times [2022-11-20 20:50:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998743889] [2022-11-20 20:50:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:40,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:40,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:40,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998743889] [2022-11-20 20:50:40,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998743889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:40,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:40,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:50:40,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121197916] [2022-11-20 20:50:40,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:40,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:50:40,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:50:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:50:40,404 INFO L87 Difference]: Start difference. First operand 5536 states and 20699 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) [2022-11-20 20:50:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:40,684 INFO L93 Difference]: Finished difference Result 4602 states and 17072 transitions. [2022-11-20 20:50:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:50:40,685 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 [2022-11-20 20:50:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:40,708 INFO L225 Difference]: With dead ends: 4602 [2022-11-20 20:50:40,708 INFO L226 Difference]: Without dead ends: 4602 [2022-11-20 20:50:40,708 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 [2022-11-20 20:50:40,710 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:40,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-11-20 20:50:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-11-20 20:50:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 3.710497717887416) internal successors, (17072), 4601 states have internal predecessors, (17072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 17072 transitions. [2022-11-20 20:50:40,866 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 17072 transitions. Word has length 5 [2022-11-20 20:50:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:40,866 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 17072 transitions. [2022-11-20 20:50:40,867 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) [2022-11-20 20:50:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 17072 transitions. [2022-11-20 20:50:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:50:40,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:40,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:40,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:50:40,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:40,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1217214373, now seen corresponding path program 1 times [2022-11-20 20:50:40,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:40,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317164621] [2022-11-20 20:50:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:40,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:40,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317164621] [2022-11-20 20:50:40,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317164621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:40,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:40,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:50:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62132216] [2022-11-20 20:50:40,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:40,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:50:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:50:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:40,951 INFO L87 Difference]: Start difference. First operand 4602 states and 17072 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:41,174 INFO L93 Difference]: Finished difference Result 5314 states and 19599 transitions. [2022-11-20 20:50:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:41,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-20 20:50:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:41,199 INFO L225 Difference]: With dead ends: 5314 [2022-11-20 20:50:41,199 INFO L226 Difference]: Without dead ends: 5314 [2022-11-20 20:50:41,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:41,200 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:41,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 67 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:50:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2022-11-20 20:50:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 5164. [2022-11-20 20:50:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5164 states, 5163 states have (on average 3.717606042998257) internal successors, (19194), 5163 states have internal predecessors, (19194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5164 states to 5164 states and 19194 transitions. [2022-11-20 20:50:41,363 INFO L78 Accepts]: Start accepts. Automaton has 5164 states and 19194 transitions. Word has length 12 [2022-11-20 20:50:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:41,364 INFO L495 AbstractCegarLoop]: Abstraction has 5164 states and 19194 transitions. [2022-11-20 20:50:41,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5164 states and 19194 transitions. [2022-11-20 20:50:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:50:41,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:41,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:41,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:50:41,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:41,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1511979502, now seen corresponding path program 1 times [2022-11-20 20:50:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:41,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019203444] [2022-11-20 20:50:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:41,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:50:41,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:50:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019203444] [2022-11-20 20:50:41,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019203444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:41,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:41,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203395896] [2022-11-20 20:50:41,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:41,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:50:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:41,470 INFO L87 Difference]: Start difference. First operand 5164 states and 19194 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-20 20:50:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:41,812 INFO L93 Difference]: Finished difference Result 6488 states and 23728 transitions. [2022-11-20 20:50:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:50:41,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2022-11-20 20:50:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:41,845 INFO L225 Difference]: With dead ends: 6488 [2022-11-20 20:50:41,846 INFO L226 Difference]: Without dead ends: 6488 [2022-11-20 20:50:41,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:50:41,847 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 108 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:41,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 121 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:50:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2022-11-20 20:50:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 6088. [2022-11-20 20:50:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 6087 states have (on average 3.720716280597996) internal successors, (22648), 6087 states have internal predecessors, (22648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 22648 transitions. [2022-11-20 20:50:42,132 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 22648 transitions. Word has length 14 [2022-11-20 20:50:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:42,133 INFO L495 AbstractCegarLoop]: Abstraction has 6088 states and 22648 transitions. [2022-11-20 20:50:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-20 20:50:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 22648 transitions. [2022-11-20 20:50:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:50:42,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:42,135 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 20:50:42,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-11-20 20:50:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1070798451, now seen corresponding path program 1 times [2022-11-20 20:50:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:50:42,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847826951] [2022-11-20 20:50:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:50:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:50:42,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:50:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:50:42,175 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:50:42,177 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:50:42,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2022-11-20 20:50:42,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2022-11-20 20:50:42,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2022-11-20 20:50:42,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2022-11-20 20:50:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2022-11-20 20:50:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2022-11-20 20:50:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2022-11-20 20:50:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2022-11-20 20:50:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2022-11-20 20:50:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2022-11-20 20:50:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2022-11-20 20:50:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2022-11-20 20:50:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2022-11-20 20:50:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2022-11-20 20:50:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2022-11-20 20:50:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2022-11-20 20:50:42,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2022-11-20 20:50:42,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2022-11-20 20:50:42,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2022-11-20 20:50:42,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2022-11-20 20:50:42,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2022-11-20 20:50:42,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (60 of 82 remaining) [2022-11-20 20:50:42,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2022-11-20 20:50:42,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 82 remaining) [2022-11-20 20:50:42,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2022-11-20 20:50:42,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2022-11-20 20:50:42,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 82 remaining) [2022-11-20 20:50:42,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2022-11-20 20:50:42,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (53 of 82 remaining) [2022-11-20 20:50:42,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2022-11-20 20:50:42,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2022-11-20 20:50:42,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 82 remaining) [2022-11-20 20:50:42,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2022-11-20 20:50:42,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2022-11-20 20:50:42,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2022-11-20 20:50:42,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2022-11-20 20:50:42,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2022-11-20 20:50:42,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 82 remaining) [2022-11-20 20:50:42,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2022-11-20 20:50:42,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2022-11-20 20:50:42,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2022-11-20 20:50:42,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2022-11-20 20:50:42,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 82 remaining) [2022-11-20 20:50:42,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2022-11-20 20:50:42,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2022-11-20 20:50:42,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2022-11-20 20:50:42,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2022-11-20 20:50:42,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2022-11-20 20:50:42,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2022-11-20 20:50:42,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2022-11-20 20:50:42,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2022-11-20 20:50:42,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2022-11-20 20:50:42,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2022-11-20 20:50:42,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2022-11-20 20:50:42,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2022-11-20 20:50:42,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2022-11-20 20:50:42,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2022-11-20 20:50:42,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2022-11-20 20:50:42,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2022-11-20 20:50:42,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2022-11-20 20:50:42,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2022-11-20 20:50:42,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2022-11-20 20:50:42,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2022-11-20 20:50:42,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2022-11-20 20:50:42,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2022-11-20 20:50:42,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 82 remaining) [2022-11-20 20:50:42,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2022-11-20 20:50:42,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2022-11-20 20:50:42,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (13 of 82 remaining) [2022-11-20 20:50:42,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2022-11-20 20:50:42,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2022-11-20 20:50:42,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2022-11-20 20:50:42,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2022-11-20 20:50:42,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2022-11-20 20:50:42,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2022-11-20 20:50:42,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2022-11-20 20:50:42,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2022-11-20 20:50:42,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (4 of 82 remaining) [2022-11-20 20:50:42,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2022-11-20 20:50:42,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 82 remaining) [2022-11-20 20:50:42,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2022-11-20 20:50:42,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2022-11-20 20:50:42,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 20:50:42,201 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:42,202 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:50:42,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 20:50:42,273 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:50:42,276 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:50:42,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 245 places, 244 transitions, 530 flow [2022-11-20 20:50:42,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 245 places, 244 transitions, 530 flow [2022-11-20 20:50:42,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 244 transitions, 530 flow [2022-11-20 20:50:42,368 INFO L130 PetriNetUnfolder]: 10/251 cut-off events. [2022-11-20 20:50:42,368 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 20:50:42,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 251 events. 10/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 877 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 265. Up to 8 conditions per place. [2022-11-20 20:50:42,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 22680 [2022-11-20 20:50:54,806 INFO L134 LiptonReduction]: Checked pairs total: 155687 [2022-11-20 20:50:54,806 INFO L136 LiptonReduction]: Total number of compositions: 363 [2022-11-20 20:50:54,807 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 153 places, 145 transitions, 332 flow