./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/singleton.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f --- 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-2329fc7 [2022-12-13 21:30:16,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:30:16,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:30:16,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:30:16,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:30:16,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:30:16,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:30:16,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:30:16,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:30:16,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:30:16,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:30:16,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:30:16,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:30:16,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:30:16,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:30:16,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:30:16,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:30:16,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:30:16,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:30:16,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:30:16,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:30:16,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:30:16,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:30:16,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:30:16,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:30:16,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:30:16,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:30:16,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:30:16,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:30:16,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:30:16,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:30:16,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:30:16,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:30:16,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:30:16,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:30:16,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:30:16,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:30:16,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:30:16,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:30:16,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:30:16,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:30:16,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 21:30:16,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:30:16,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:30:16,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:30:16,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:30:16,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:30:16,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:30:16,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:30:16,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:30:16,565 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:30:16,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:30:16,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:30:16,565 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 21:30:16,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:30:16,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 21:30:16,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:30:16,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:30:16,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:30:16,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:30:16,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:30:16,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:30:16,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:30:16,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:30:16,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:30:16,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:30:16,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:30:16,568 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:30:16,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:30:16,569 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:30:16,569 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f [2022-12-13 21:30:16,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:30:16,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:30:16,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:30:16,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:30:16,779 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:30:16,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/singleton.i [2022-12-13 21:30:19,265 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:30:19,498 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:30:19,499 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/sv-benchmarks/c/pthread/singleton.i [2022-12-13 21:30:19,513 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data/a5fc7f591/2b471f376c7f4e139ee7d16bc39987a9/FLAG76e141f0c [2022-12-13 21:30:19,819 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data/a5fc7f591/2b471f376c7f4e139ee7d16bc39987a9 [2022-12-13 21:30:19,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:30:19,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:30:19,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:30:19,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:30:19,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:30:19,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:30:19" (1/1) ... [2022-12-13 21:30:19,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68934c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:19, skipping insertion in model container [2022-12-13 21:30:19,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:30:19" (1/1) ... [2022-12-13 21:30:19,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:30:19,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:30:20,004 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 21:30:20,167 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-12-13 21:30:20,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:20,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:20,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:20,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:20,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:30:20,188 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:30:20,198 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 21:30:20,212 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-12-13 21:30:20,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:20,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:20,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:20,214 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:20,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:30:20,256 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:30:20,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20 WrapperNode [2022-12-13 21:30:20,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:30:20,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:30:20,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:30:20,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:30:20,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,287 INFO L138 Inliner]: procedures = 325, calls = 52, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2022-12-13 21:30:20,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:30:20,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:30:20,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:30:20,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:30:20,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,304 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:30:20,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:30:20,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:30:20,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:30:20,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (1/1) ... [2022-12-13 21:30:20,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:30:20,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:30:20,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:30:20,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:30:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:30:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:30:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:30:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:30:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:30:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-12-13 21:30:20,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-12-13 21:30:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:30:20,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:30:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:30:20,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:30:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:30:20,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:30:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:30:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 21:30:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:30:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:30:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:30:20,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:30:20,366 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 21:30:20,476 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:30:20,478 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:30:20,706 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:30:20,713 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:30:20,714 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 21:30:20,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:30:20 BoogieIcfgContainer [2022-12-13 21:30:20,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:30:20,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:30:20,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:30:20,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:30:20,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:30:19" (1/3) ... [2022-12-13 21:30:20,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcecc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:30:20, skipping insertion in model container [2022-12-13 21:30:20,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:20" (2/3) ... [2022-12-13 21:30:20,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcecc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:30:20, skipping insertion in model container [2022-12-13 21:30:20,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:30:20" (3/3) ... [2022-12-13 21:30:20,725 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2022-12-13 21:30:20,741 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:30:20,741 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-13 21:30:20,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:30:20,863 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-12-13 21:30:20,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 248 transitions, 603 flow [2022-12-13 21:30:20,955 INFO L130 PetriNetUnfolder]: 6/169 cut-off events. [2022-12-13 21:30:20,955 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:30:20,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 169 events. 6/169 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-13 21:30:20,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 248 transitions, 603 flow [2022-12-13 21:30:20,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 164 transitions, 379 flow [2022-12-13 21:30:20,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:30:20,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 164 transitions, 379 flow [2022-12-13 21:30:20,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 164 transitions, 379 flow [2022-12-13 21:30:20,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 164 transitions, 379 flow [2022-12-13 21:30:21,023 INFO L130 PetriNetUnfolder]: 6/164 cut-off events. [2022-12-13 21:30:21,023 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:30:21,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 164 events. 6/164 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 174 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-13 21:30:21,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2022-12-13 21:30:23,673 INFO L134 LiptonReduction]: Checked pairs total: 6885 [2022-12-13 21:30:23,674 INFO L136 LiptonReduction]: Total number of compositions: 130 [2022-12-13 21:30:23,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:30:23,688 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=PETRI_NET, 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;@65a802d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:30:23,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-12-13 21:30:23,689 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 21:30:23,689 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:30:23,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:23,690 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 21:30:23,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash 627, now seen corresponding path program 1 times [2022-12-13 21:30:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49874037] [2022-12-13 21:30:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:23,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49874037] [2022-12-13 21:30:23,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49874037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:23,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:23,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 21:30:23,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791523998] [2022-12-13 21:30:23,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:23,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:30:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:23,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:30:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:30:23,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 380 [2022-12-13 21:30:23,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 221 flow. Second operand has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:23,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:23,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 380 [2022-12-13 21:30:23,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:26,039 INFO L130 PetriNetUnfolder]: 19442/26672 cut-off events. [2022-12-13 21:30:26,039 INFO L131 PetriNetUnfolder]: For 769/769 co-relation queries the response was YES. [2022-12-13 21:30:26,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53375 conditions, 26672 events. 19442/26672 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145271 event pairs, 19098 based on Foata normal form. 0/9489 useless extension candidates. Maximal degree in co-relation 53350. Up to 25317 conditions per place. [2022-12-13 21:30:26,221 INFO L137 encePairwiseOnDemand]: 378/380 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-12-13 21:30:26,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2022-12-13 21:30:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:30:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 21:30:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-12-13 21:30:26,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6592105263157895 [2022-12-13 21:30:26,236 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-12-13 21:30:26,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-12-13 21:30:26,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:26,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-12-13 21:30:26,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:26,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:26,252 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:26,254 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 501 transitions. [2022-12-13 21:30:26,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2022-12-13 21:30:26,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 21:30:26,327 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2022-12-13 21:30:26,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-12-13 21:30:26,332 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-12-13 21:30:26,332 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2022-12-13 21:30:26,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:26,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:26,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:30:26,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:30:26,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash 614634, now seen corresponding path program 1 times [2022-12-13 21:30:26,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:26,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970377003] [2022-12-13 21:30:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:26,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:26,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970377003] [2022-12-13 21:30:26,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970377003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:26,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:26,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:30:26,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550265013] [2022-12-13 21:30:26,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:26,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:30:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:30:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:30:26,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 380 [2022-12-13 21:30:26,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:26,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:26,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 380 [2022-12-13 21:30:26,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:28,361 INFO L130 PetriNetUnfolder]: 23211/32262 cut-off events. [2022-12-13 21:30:28,361 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2022-12-13 21:30:28,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63265 conditions, 32262 events. 23211/32262 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 186307 event pairs, 19840 based on Foata normal form. 0/11517 useless extension candidates. Maximal degree in co-relation 63262. Up to 23874 conditions per place. [2022-12-13 21:30:28,473 INFO L137 encePairwiseOnDemand]: 368/380 looper letters, 121 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2022-12-13 21:30:28,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 147 transitions, 591 flow [2022-12-13 21:30:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:30:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:30:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2022-12-13 21:30:28,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535087719298246 [2022-12-13 21:30:28,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2022-12-13 21:30:28,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2022-12-13 21:30:28,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:28,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2022-12-13 21:30:28,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:28,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:28,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:28,480 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 745 transitions. [2022-12-13 21:30:28,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 147 transitions, 591 flow [2022-12-13 21:30:28,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 591 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:30:28,483 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 265 flow [2022-12-13 21:30:28,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2022-12-13 21:30:28,483 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-12-13 21:30:28,483 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 265 flow [2022-12-13 21:30:28,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:28,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:28,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:30:28,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:30:28,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 614633, now seen corresponding path program 1 times [2022-12-13 21:30:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:28,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293201277] [2022-12-13 21:30:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293201277] [2022-12-13 21:30:28,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293201277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:28,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:28,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:30:28,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332007483] [2022-12-13 21:30:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:28,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:30:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:30:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:30:28,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 380 [2022-12-13 21:30:28,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:28,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:28,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 380 [2022-12-13 21:30:28,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:30,410 INFO L130 PetriNetUnfolder]: 17985/25242 cut-off events. [2022-12-13 21:30:30,410 INFO L131 PetriNetUnfolder]: For 5958/5958 co-relation queries the response was YES. [2022-12-13 21:30:30,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53936 conditions, 25242 events. 17985/25242 cut-off events. For 5958/5958 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143953 event pairs, 17620 based on Foata normal form. 1462/12457 useless extension candidates. Maximal degree in co-relation 53931. Up to 23826 conditions per place. [2022-12-13 21:30:30,488 INFO L137 encePairwiseOnDemand]: 371/380 looper letters, 74 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2022-12-13 21:30:30,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 462 flow [2022-12-13 21:30:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:30:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:30:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2022-12-13 21:30:30,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5912280701754385 [2022-12-13 21:30:30,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2022-12-13 21:30:30,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2022-12-13 21:30:30,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:30,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2022-12-13 21:30:30,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:30,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:30,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:30,494 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 265 flow. Second operand 3 states and 674 transitions. [2022-12-13 21:30:30,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 462 flow [2022-12-13 21:30:30,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 103 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:30:30,503 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 305 flow [2022-12-13 21:30:30,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2022-12-13 21:30:30,504 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-12-13 21:30:30,505 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 305 flow [2022-12-13 21:30:30,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:30,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:30,505 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:30:30,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:30:30,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 19052225, now seen corresponding path program 1 times [2022-12-13 21:30:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:30,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172825147] [2022-12-13 21:30:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:30,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:30,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:30,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172825147] [2022-12-13 21:30:30,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172825147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:30,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:30,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:30:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461627041] [2022-12-13 21:30:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:30,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:30:30,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:30:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:30:30,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 380 [2022-12-13 21:30:30,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:30,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:30,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 380 [2022-12-13 21:30:30,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:32,264 INFO L130 PetriNetUnfolder]: 17971/25216 cut-off events. [2022-12-13 21:30:32,265 INFO L131 PetriNetUnfolder]: For 5961/5961 co-relation queries the response was YES. [2022-12-13 21:30:32,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53903 conditions, 25216 events. 17971/25216 cut-off events. For 5961/5961 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143786 event pairs, 17599 based on Foata normal form. 11/10984 useless extension candidates. Maximal degree in co-relation 53897. Up to 23817 conditions per place. [2022-12-13 21:30:32,345 INFO L137 encePairwiseOnDemand]: 377/380 looper letters, 78 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2022-12-13 21:30:32,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 479 flow [2022-12-13 21:30:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:30:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:30:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 703 transitions. [2022-12-13 21:30:32,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2022-12-13 21:30:32,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 703 transitions. [2022-12-13 21:30:32,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 703 transitions. [2022-12-13 21:30:32,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:32,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 703 transitions. [2022-12-13 21:30:32,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:32,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:32,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:32,350 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 305 flow. Second operand 3 states and 703 transitions. [2022-12-13 21:30:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 479 flow [2022-12-13 21:30:32,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 463 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:30:32,354 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 300 flow [2022-12-13 21:30:32,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2022-12-13 21:30:32,355 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -6 predicate places. [2022-12-13 21:30:32,355 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 300 flow [2022-12-13 21:30:32,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:32,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:32,356 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:32,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:30:32,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1563990483, now seen corresponding path program 1 times [2022-12-13 21:30:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:32,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26909653] [2022-12-13 21:30:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:32,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26909653] [2022-12-13 21:30:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26909653] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:32,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:32,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:30:32,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445159413] [2022-12-13 21:30:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:32,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:30:32,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:30:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:30:32,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 380 [2022-12-13 21:30:32,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:32,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:32,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 380 [2022-12-13 21:30:32,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:34,181 INFO L130 PetriNetUnfolder]: 17958/25184 cut-off events. [2022-12-13 21:30:34,181 INFO L131 PetriNetUnfolder]: For 8840/8840 co-relation queries the response was YES. [2022-12-13 21:30:34,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55272 conditions, 25184 events. 17958/25184 cut-off events. For 8840/8840 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143701 event pairs, 17593 based on Foata normal form. 0/10962 useless extension candidates. Maximal degree in co-relation 55265. Up to 23762 conditions per place. [2022-12-13 21:30:34,271 INFO L137 encePairwiseOnDemand]: 373/380 looper letters, 72 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2022-12-13 21:30:34,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 454 flow [2022-12-13 21:30:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:30:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:30:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2022-12-13 21:30:34,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5651315789473684 [2022-12-13 21:30:34,274 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2022-12-13 21:30:34,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2022-12-13 21:30:34,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:34,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2022-12-13 21:30:34,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:34,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:34,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:34,281 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 300 flow. Second operand 4 states and 859 transitions. [2022-12-13 21:30:34,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 454 flow [2022-12-13 21:30:34,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 448 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:30:34,285 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 282 flow [2022-12-13 21:30:34,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2022-12-13 21:30:34,286 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-12-13 21:30:34,286 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 282 flow [2022-12-13 21:30:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:34,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:34,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:34,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:30:34,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1056441044, now seen corresponding path program 1 times [2022-12-13 21:30:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:34,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762739120] [2022-12-13 21:30:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:34,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762739120] [2022-12-13 21:30:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762739120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:34,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:30:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400632346] [2022-12-13 21:30:34,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:30:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:30:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:30:35,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 380 [2022-12-13 21:30:35,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 282 flow. Second operand has 8 states, 8 states have (on average 193.125) internal successors, (1545), 8 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:35,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:35,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 380 [2022-12-13 21:30:35,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:36,253 INFO L130 PetriNetUnfolder]: 12743/18173 cut-off events. [2022-12-13 21:30:36,253 INFO L131 PetriNetUnfolder]: For 8814/8814 co-relation queries the response was YES. [2022-12-13 21:30:36,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38582 conditions, 18173 events. 12743/18173 cut-off events. For 8814/8814 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102615 event pairs, 12473 based on Foata normal form. 1457/8961 useless extension candidates. Maximal degree in co-relation 38575. Up to 17103 conditions per place. [2022-12-13 21:30:36,326 INFO L137 encePairwiseOnDemand]: 370/380 looper letters, 64 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2022-12-13 21:30:36,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 441 flow [2022-12-13 21:30:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:30:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:30:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1033 transitions. [2022-12-13 21:30:36,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5436842105263158 [2022-12-13 21:30:36,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1033 transitions. [2022-12-13 21:30:36,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1033 transitions. [2022-12-13 21:30:36,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:36,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1033 transitions. [2022-12-13 21:30:36,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:36,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 380.0) internal successors, (2280), 6 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:36,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 380.0) internal successors, (2280), 6 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:36,334 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 282 flow. Second operand 5 states and 1033 transitions. [2022-12-13 21:30:36,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 441 flow [2022-12-13 21:30:36,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 96 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:30:36,339 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 308 flow [2022-12-13 21:30:36,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2022-12-13 21:30:36,339 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2022-12-13 21:30:36,340 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 308 flow [2022-12-13 21:30:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.125) internal successors, (1545), 8 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:36,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:36,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:36,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:30:36,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1071443909, now seen corresponding path program 1 times [2022-12-13 21:30:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31343416] [2022-12-13 21:30:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31343416] [2022-12-13 21:30:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31343416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:36,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:36,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:30:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175541181] [2022-12-13 21:30:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:30:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:30:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:30:36,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 380 [2022-12-13 21:30:36,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 199.2) internal successors, (996), 5 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:36,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:36,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 380 [2022-12-13 21:30:36,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:37,828 INFO L130 PetriNetUnfolder]: 7621/11509 cut-off events. [2022-12-13 21:30:37,829 INFO L131 PetriNetUnfolder]: For 2925/2925 co-relation queries the response was YES. [2022-12-13 21:30:37,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24247 conditions, 11509 events. 7621/11509 cut-off events. For 2925/2925 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 66073 event pairs, 7348 based on Foata normal form. 0/5454 useless extension candidates. Maximal degree in co-relation 24239. Up to 10435 conditions per place. [2022-12-13 21:30:37,877 INFO L137 encePairwiseOnDemand]: 373/380 looper letters, 67 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2022-12-13 21:30:37,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 465 flow [2022-12-13 21:30:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:30:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:30:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 852 transitions. [2022-12-13 21:30:37,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5605263157894737 [2022-12-13 21:30:37,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 852 transitions. [2022-12-13 21:30:37,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 852 transitions. [2022-12-13 21:30:37,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:37,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 852 transitions. [2022-12-13 21:30:37,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:37,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:37,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:37,884 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 308 flow. Second operand 4 states and 852 transitions. [2022-12-13 21:30:37,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 465 flow [2022-12-13 21:30:37,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:30:37,889 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 303 flow [2022-12-13 21:30:37,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-12-13 21:30:37,889 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -11 predicate places. [2022-12-13 21:30:37,889 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 303 flow [2022-12-13 21:30:37,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.2) internal successors, (996), 5 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:37,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:37,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:37,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:30:37,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1134542202, now seen corresponding path program 1 times [2022-12-13 21:30:37,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:37,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092080216] [2022-12-13 21:30:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092080216] [2022-12-13 21:30:38,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092080216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:38,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:38,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:30:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115284798] [2022-12-13 21:30:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:30:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:30:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:30:38,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 380 [2022-12-13 21:30:38,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:38,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:38,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 380 [2022-12-13 21:30:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:39,334 INFO L130 PetriNetUnfolder]: 8091/11571 cut-off events. [2022-12-13 21:30:39,334 INFO L131 PetriNetUnfolder]: For 3050/3050 co-relation queries the response was YES. [2022-12-13 21:30:39,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25065 conditions, 11571 events. 8091/11571 cut-off events. For 3050/3050 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59763 event pairs, 7819 based on Foata normal form. 0/5648 useless extension candidates. Maximal degree in co-relation 25057. Up to 11072 conditions per place. [2022-12-13 21:30:39,383 INFO L137 encePairwiseOnDemand]: 373/380 looper letters, 66 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2022-12-13 21:30:39,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 458 flow [2022-12-13 21:30:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:30:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:30:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 851 transitions. [2022-12-13 21:30:39,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5598684210526316 [2022-12-13 21:30:39,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 851 transitions. [2022-12-13 21:30:39,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 851 transitions. [2022-12-13 21:30:39,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:39,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 851 transitions. [2022-12-13 21:30:39,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,393 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 303 flow. Second operand 4 states and 851 transitions. [2022-12-13 21:30:39,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 458 flow [2022-12-13 21:30:39,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:30:39,398 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 295 flow [2022-12-13 21:30:39,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2022-12-13 21:30:39,399 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -15 predicate places. [2022-12-13 21:30:39,399 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 295 flow [2022-12-13 21:30:39,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:39,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:30:39,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1134542245, now seen corresponding path program 1 times [2022-12-13 21:30:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151172048] [2022-12-13 21:30:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:39,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:39,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151172048] [2022-12-13 21:30:39,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151172048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:39,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:39,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:30:39,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796725913] [2022-12-13 21:30:39,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:39,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:30:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:30:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:30:39,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 380 [2022-12-13 21:30:39,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:39,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 380 [2022-12-13 21:30:39,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:39,951 INFO L130 PetriNetUnfolder]: 2561/4001 cut-off events. [2022-12-13 21:30:39,951 INFO L131 PetriNetUnfolder]: For 1159/1159 co-relation queries the response was YES. [2022-12-13 21:30:39,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8648 conditions, 4001 events. 2561/4001 cut-off events. For 1159/1159 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19209 event pairs, 2423 based on Foata normal form. 0/2434 useless extension candidates. Maximal degree in co-relation 8640. Up to 3657 conditions per place. [2022-12-13 21:30:39,965 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 66 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-12-13 21:30:39,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 429 flow [2022-12-13 21:30:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:30:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:30:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 671 transitions. [2022-12-13 21:30:39,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5885964912280702 [2022-12-13 21:30:39,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 671 transitions. [2022-12-13 21:30:39,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 671 transitions. [2022-12-13 21:30:39,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:39,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 671 transitions. [2022-12-13 21:30:39,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,974 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 295 flow. Second operand 3 states and 671 transitions. [2022-12-13 21:30:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 429 flow [2022-12-13 21:30:39,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:30:39,978 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 279 flow [2022-12-13 21:30:39,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2022-12-13 21:30:39,979 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -21 predicate places. [2022-12-13 21:30:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 279 flow [2022-12-13 21:30:39,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:39,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:39,979 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:39,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 21:30:39,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1134542244, now seen corresponding path program 1 times [2022-12-13 21:30:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381565008] [2022-12-13 21:30:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381565008] [2022-12-13 21:30:40,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381565008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:40,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:40,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:30:40,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770676402] [2022-12-13 21:30:40,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:40,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:30:40,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:30:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:30:40,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 380 [2022-12-13 21:30:40,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:40,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 380 [2022-12-13 21:30:40,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:40,265 INFO L130 PetriNetUnfolder]: 565/1060 cut-off events. [2022-12-13 21:30:40,265 INFO L131 PetriNetUnfolder]: For 388/388 co-relation queries the response was YES. [2022-12-13 21:30:40,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2357 conditions, 1060 events. 565/1060 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4164 event pairs, 502 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 2349. Up to 862 conditions per place. [2022-12-13 21:30:40,267 INFO L137 encePairwiseOnDemand]: 373/380 looper letters, 54 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2022-12-13 21:30:40,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 395 flow [2022-12-13 21:30:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:30:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:30:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2022-12-13 21:30:40,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5552631578947368 [2022-12-13 21:30:40,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2022-12-13 21:30:40,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2022-12-13 21:30:40,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:40,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2022-12-13 21:30:40,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,271 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 279 flow. Second operand 3 states and 633 transitions. [2022-12-13 21:30:40,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 395 flow [2022-12-13 21:30:40,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:30:40,272 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 277 flow [2022-12-13 21:30:40,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2022-12-13 21:30:40,273 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -24 predicate places. [2022-12-13 21:30:40,273 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 277 flow [2022-12-13 21:30:40,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:40,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:40,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 21:30:40,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash 626652310, now seen corresponding path program 1 times [2022-12-13 21:30:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:40,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086243246] [2022-12-13 21:30:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:40,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086243246] [2022-12-13 21:30:40,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086243246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:40,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:40,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:30:40,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17976228] [2022-12-13 21:30:40,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:40,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:30:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:30:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:30:40,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 380 [2022-12-13 21:30:40,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:40,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 380 [2022-12-13 21:30:40,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:40,790 INFO L130 PetriNetUnfolder]: 549/996 cut-off events. [2022-12-13 21:30:40,791 INFO L131 PetriNetUnfolder]: For 374/374 co-relation queries the response was YES. [2022-12-13 21:30:40,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 996 events. 549/996 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3689 event pairs, 488 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 2264. Up to 847 conditions per place. [2022-12-13 21:30:40,793 INFO L137 encePairwiseOnDemand]: 373/380 looper letters, 55 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-12-13 21:30:40,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 410 flow [2022-12-13 21:30:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:30:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:30:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2022-12-13 21:30:40,795 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2022-12-13 21:30:40,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2022-12-13 21:30:40,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2022-12-13 21:30:40,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:40,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2022-12-13 21:30:40,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,798 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,798 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 277 flow. Second operand 4 states and 840 transitions. [2022-12-13 21:30:40,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 410 flow [2022-12-13 21:30:40,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:30:40,800 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 271 flow [2022-12-13 21:30:40,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2022-12-13 21:30:40,800 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -27 predicate places. [2022-12-13 21:30:40,800 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 271 flow [2022-12-13 21:30:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:40,801 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:30:40,801 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 917461848, now seen corresponding path program 1 times [2022-12-13 21:30:40,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:40,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576399470] [2022-12-13 21:30:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:40,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576399470] [2022-12-13 21:30:40,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576399470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:40,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:40,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:30:40,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936566421] [2022-12-13 21:30:40,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:40,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:30:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:30:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:30:40,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 380 [2022-12-13 21:30:40,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:40,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:40,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 380 [2022-12-13 21:30:40,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:41,050 INFO L130 PetriNetUnfolder]: 494/911 cut-off events. [2022-12-13 21:30:41,050 INFO L131 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-12-13 21:30:41,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 911 events. 494/911 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3303 event pairs, 434 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 2070. Up to 758 conditions per place. [2022-12-13 21:30:41,053 INFO L137 encePairwiseOnDemand]: 376/380 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-12-13 21:30:41,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 383 flow [2022-12-13 21:30:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:30:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:30:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2022-12-13 21:30:41,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2022-12-13 21:30:41,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2022-12-13 21:30:41,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2022-12-13 21:30:41,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:41,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2022-12-13 21:30:41,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,059 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 271 flow. Second operand 3 states and 646 transitions. [2022-12-13 21:30:41,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 383 flow [2022-12-13 21:30:41,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 373 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:30:41,061 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 263 flow [2022-12-13 21:30:41,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2022-12-13 21:30:41,061 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2022-12-13 21:30:41,061 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 263 flow [2022-12-13 21:30:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:41,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:41,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 21:30:41,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 917461850, now seen corresponding path program 1 times [2022-12-13 21:30:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:41,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117482216] [2022-12-13 21:30:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:41,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:41,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117482216] [2022-12-13 21:30:41,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117482216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:41,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:41,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:30:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876546772] [2022-12-13 21:30:41,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:41,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:30:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:30:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:30:41,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 380 [2022-12-13 21:30:41,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:41,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 380 [2022-12-13 21:30:41,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:41,433 INFO L130 PetriNetUnfolder]: 450/837 cut-off events. [2022-12-13 21:30:41,433 INFO L131 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2022-12-13 21:30:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 837 events. 450/837 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2937 event pairs, 389 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 1907. Up to 690 conditions per place. [2022-12-13 21:30:41,435 INFO L137 encePairwiseOnDemand]: 375/380 looper letters, 51 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 21:30:41,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 392 flow [2022-12-13 21:30:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:30:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:30:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 835 transitions. [2022-12-13 21:30:41,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5493421052631579 [2022-12-13 21:30:41,436 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 835 transitions. [2022-12-13 21:30:41,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 835 transitions. [2022-12-13 21:30:41,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:41,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 835 transitions. [2022-12-13 21:30:41,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,440 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 263 flow. Second operand 4 states and 835 transitions. [2022-12-13 21:30:41,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 392 flow [2022-12-13 21:30:41,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:30:41,442 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 263 flow [2022-12-13 21:30:41,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-12-13 21:30:41,443 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -31 predicate places. [2022-12-13 21:30:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 263 flow [2022-12-13 21:30:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:41,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:41,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 21:30:41,444 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1525891718, now seen corresponding path program 1 times [2022-12-13 21:30:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071807581] [2022-12-13 21:30:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:42,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:42,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071807581] [2022-12-13 21:30:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071807581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:42,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 21:30:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604204267] [2022-12-13 21:30:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:30:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:30:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:30:43,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2022-12-13 21:30:43,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 263 flow. Second operand has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:43,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:43,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2022-12-13 21:30:43,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:43,396 INFO L130 PetriNetUnfolder]: 509/895 cut-off events. [2022-12-13 21:30:43,396 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-12-13 21:30:43,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 895 events. 509/895 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2988 event pairs, 446 based on Foata normal form. 1/844 useless extension candidates. Maximal degree in co-relation 2094. Up to 778 conditions per place. [2022-12-13 21:30:43,398 INFO L137 encePairwiseOnDemand]: 369/380 looper letters, 54 selfloop transitions, 14 changer transitions 0/74 dead transitions. [2022-12-13 21:30:43,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 429 flow [2022-12-13 21:30:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:30:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:30:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1436 transitions. [2022-12-13 21:30:43,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4723684210526316 [2022-12-13 21:30:43,400 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1436 transitions. [2022-12-13 21:30:43,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1436 transitions. [2022-12-13 21:30:43,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:43,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1436 transitions. [2022-12-13 21:30:43,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.5) internal successors, (1436), 8 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:43,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 380.0) internal successors, (3420), 9 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:43,405 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 380.0) internal successors, (3420), 9 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:43,405 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 263 flow. Second operand 8 states and 1436 transitions. [2022-12-13 21:30:43,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 429 flow [2022-12-13 21:30:43,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:30:43,407 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 305 flow [2022-12-13 21:30:43,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2022-12-13 21:30:43,407 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -25 predicate places. [2022-12-13 21:30:43,407 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 305 flow [2022-12-13 21:30:43,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:43,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:43,409 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:43,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 21:30:43,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:43,409 INFO L85 PathProgramCache]: Analyzing trace with hash 58001262, now seen corresponding path program 1 times [2022-12-13 21:30:43,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:43,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41786783] [2022-12-13 21:30:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:43,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41786783] [2022-12-13 21:30:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41786783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:43,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:43,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 21:30:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889892754] [2022-12-13 21:30:43,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:43,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:30:43,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:30:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:30:44,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2022-12-13 21:30:44,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 305 flow. Second operand has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:44,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:44,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2022-12-13 21:30:44,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:45,018 INFO L130 PetriNetUnfolder]: 443/828 cut-off events. [2022-12-13 21:30:45,019 INFO L131 PetriNetUnfolder]: For 349/349 co-relation queries the response was YES. [2022-12-13 21:30:45,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 828 events. 443/828 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2920 event pairs, 380 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 1913. Up to 671 conditions per place. [2022-12-13 21:30:45,021 INFO L137 encePairwiseOnDemand]: 366/380 looper letters, 48 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2022-12-13 21:30:45,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 494 flow [2022-12-13 21:30:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:30:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:30:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2124 transitions. [2022-12-13 21:30:45,024 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46578947368421053 [2022-12-13 21:30:45,024 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2124 transitions. [2022-12-13 21:30:45,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2124 transitions. [2022-12-13 21:30:45,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:45,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2124 transitions. [2022-12-13 21:30:45,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:45,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 380.0) internal successors, (4940), 13 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:45,030 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 380.0) internal successors, (4940), 13 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:45,030 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 305 flow. Second operand 12 states and 2124 transitions. [2022-12-13 21:30:45,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 494 flow [2022-12-13 21:30:45,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 477 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 21:30:45,032 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 356 flow [2022-12-13 21:30:45,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=356, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2022-12-13 21:30:45,033 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -17 predicate places. [2022-12-13 21:30:45,033 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 356 flow [2022-12-13 21:30:45,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:45,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:45,034 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:45,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 21:30:45,034 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1798038064, now seen corresponding path program 1 times [2022-12-13 21:30:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197876950] [2022-12-13 21:30:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:45,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197876950] [2022-12-13 21:30:45,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197876950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:45,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:45,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 21:30:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930097963] [2022-12-13 21:30:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:30:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:30:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:30:46,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2022-12-13 21:30:46,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 356 flow. Second operand has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:46,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:46,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2022-12-13 21:30:46,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:46,623 INFO L130 PetriNetUnfolder]: 442/826 cut-off events. [2022-12-13 21:30:46,623 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2022-12-13 21:30:46,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 826 events. 442/826 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2911 event pairs, 379 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 1935. Up to 671 conditions per place. [2022-12-13 21:30:46,626 INFO L137 encePairwiseOnDemand]: 366/380 looper letters, 48 selfloop transitions, 22 changer transitions 0/79 dead transitions. [2022-12-13 21:30:46,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 79 transitions, 550 flow [2022-12-13 21:30:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 21:30:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 21:30:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2296 transitions. [2022-12-13 21:30:46,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4647773279352227 [2022-12-13 21:30:46,630 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2296 transitions. [2022-12-13 21:30:46,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2296 transitions. [2022-12-13 21:30:46,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:46,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2296 transitions. [2022-12-13 21:30:46,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 176.6153846153846) internal successors, (2296), 13 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:46,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 380.0) internal successors, (5320), 14 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:46,636 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 380.0) internal successors, (5320), 14 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:46,636 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 356 flow. Second operand 13 states and 2296 transitions. [2022-12-13 21:30:46,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 79 transitions, 550 flow [2022-12-13 21:30:46,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 79 transitions, 517 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 21:30:46,639 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 395 flow [2022-12-13 21:30:46,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=395, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2022-12-13 21:30:46,639 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -12 predicate places. [2022-12-13 21:30:46,640 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 395 flow [2022-12-13 21:30:46,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:46,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:46,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:46,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 21:30:46,641 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash -95393907, now seen corresponding path program 1 times [2022-12-13 21:30:46,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:46,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055484006] [2022-12-13 21:30:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:30:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:30:47,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:30:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055484006] [2022-12-13 21:30:47,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055484006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:30:47,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:30:47,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 21:30:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341153096] [2022-12-13 21:30:47,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:30:47,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:30:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:30:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:30:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:30:47,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2022-12-13 21:30:47,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 395 flow. Second operand has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:47,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:30:47,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2022-12-13 21:30:47,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:30:48,072 INFO L130 PetriNetUnfolder]: 442/825 cut-off events. [2022-12-13 21:30:48,072 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2022-12-13 21:30:48,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 825 events. 442/825 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2909 event pairs, 379 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 1946. Up to 671 conditions per place. [2022-12-13 21:30:48,074 INFO L137 encePairwiseOnDemand]: 367/380 looper letters, 43 selfloop transitions, 23 changer transitions 0/75 dead transitions. [2022-12-13 21:30:48,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 75 transitions, 547 flow [2022-12-13 21:30:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:30:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:30:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2118 transitions. [2022-12-13 21:30:48,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644736842105263 [2022-12-13 21:30:48,077 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2118 transitions. [2022-12-13 21:30:48,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2118 transitions. [2022-12-13 21:30:48,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:30:48,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2118 transitions. [2022-12-13 21:30:48,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 176.5) internal successors, (2118), 12 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:48,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 380.0) internal successors, (4940), 13 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:48,083 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 380.0) internal successors, (4940), 13 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:48,083 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 395 flow. Second operand 12 states and 2118 transitions. [2022-12-13 21:30:48,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 75 transitions, 547 flow [2022-12-13 21:30:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 495 flow, removed 0 selfloop flow, removed 14 redundant places. [2022-12-13 21:30:48,085 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 377 flow [2022-12-13 21:30:48,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2022-12-13 21:30:48,085 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -16 predicate places. [2022-12-13 21:30:48,085 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 377 flow [2022-12-13 21:30:48,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 174.26666666666668) internal successors, (2614), 15 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:30:48,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:30:48,086 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:48,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 21:30:48,086 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:30:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:30:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1684626274, now seen corresponding path program 1 times [2022-12-13 21:30:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:30:48,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110397213] [2022-12-13 21:30:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:30:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:30:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:30:48,115 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:30:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:30:48,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:30:48,162 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:30:48,162 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (70 of 71 remaining) [2022-12-13 21:30:48,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 71 remaining) [2022-12-13 21:30:48,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 71 remaining) [2022-12-13 21:30:48,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 71 remaining) [2022-12-13 21:30:48,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (34 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 71 remaining) [2022-12-13 21:30:48,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 71 remaining) [2022-12-13 21:30:48,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 71 remaining) [2022-12-13 21:30:48,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 71 remaining) [2022-12-13 21:30:48,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 21:30:48,169 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:30:48,174 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 21:30:48,174 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 21:30:48,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 09:30:48 BasicIcfg [2022-12-13 21:30:48,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 21:30:48,228 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 21:30:48,228 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 21:30:48,229 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 21:30:48,229 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:30:20" (3/4) ... [2022-12-13 21:30:48,231 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 21:30:48,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 21:30:48,231 INFO L158 Benchmark]: Toolchain (without parser) took 28409.32ms. Allocated memory was 115.3MB in the beginning and 4.9GB in the end (delta: 4.7GB). Free memory was 85.6MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-12-13 21:30:48,231 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 92.3MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 21:30:48,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 434.24ms. Allocated memory is still 115.3MB. Free memory was 85.6MB in the beginning and 52.1MB in the end (delta: 33.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-12-13 21:30:48,232 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.00ms. Allocated memory is still 115.3MB. Free memory was 52.1MB in the beginning and 49.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 21:30:48,232 INFO L158 Benchmark]: Boogie Preprocessor took 18.82ms. Allocated memory is still 115.3MB. Free memory was 49.7MB in the beginning and 48.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 21:30:48,232 INFO L158 Benchmark]: RCFGBuilder took 409.53ms. Allocated memory is still 115.3MB. Free memory was 48.1MB in the beginning and 71.6MB in the end (delta: -23.6MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2022-12-13 21:30:48,232 INFO L158 Benchmark]: TraceAbstraction took 27509.30ms. Allocated memory was 115.3MB in the beginning and 4.9GB in the end (delta: 4.7GB). Free memory was 70.9MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-12-13 21:30:48,232 INFO L158 Benchmark]: Witness Printer took 2.46ms. Allocated memory is still 4.9GB. Free memory was 2.3GB in the beginning and 2.3GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 21:30:48,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 92.3MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 434.24ms. Allocated memory is still 115.3MB. Free memory was 85.6MB in the beginning and 52.1MB in the end (delta: 33.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.00ms. Allocated memory is still 115.3MB. Free memory was 52.1MB in the beginning and 49.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.82ms. Allocated memory is still 115.3MB. Free memory was 49.7MB in the beginning and 48.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 409.53ms. Allocated memory is still 115.3MB. Free memory was 48.1MB in the beginning and 71.6MB in the end (delta: -23.6MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * TraceAbstraction took 27509.30ms. Allocated memory was 115.3MB in the beginning and 4.9GB in the end (delta: 4.7GB). Free memory was 70.9MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * Witness Printer took 2.46ms. Allocated memory is still 4.9GB. Free memory was 2.3GB in the beginning and 2.3GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 177 PlacesBefore, 99 PlacesAfterwards, 164 TransitionsBefore, 85 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 44 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 130 TotalNumberOfCompositions, 6885 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4581, independent: 4337, independent conditional: 0, independent unconditional: 4337, dependent: 244, dependent conditional: 0, dependent unconditional: 244, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1298, independent: 1231, independent conditional: 0, independent unconditional: 1231, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4581, independent: 3106, independent conditional: 0, independent unconditional: 3106, dependent: 177, dependent conditional: 0, dependent unconditional: 177, unknown: 1298, unknown conditional: 0, unknown unconditional: 1298] , Statistics on independence cache: Total cache size (in pairs): 169, Positive cache size: 142, Positive conditional cache size: 0, Positive unconditional cache size: 142, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1123. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=-1, t={8:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=0, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={0:0}] [L1148] 1 \read(t1) VAL [\read(t1)=0, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1163] 0 \read(t) VAL [\read(t)=-1, \read(t1)=0, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={8:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=0, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=1, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=2, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=3, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=4, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] 1 \read(t2) VAL [\read(t2)=1, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=1, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1154] 1 \read(t3) VAL [\read(t3)=2, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=2, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1155] 1 \read(t4) VAL [\read(t4)=3, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=3, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1156] 1 \read(t5) VAL [\read(t5)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={5:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=-1, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={8:0}, v={5:0}] [L1164] EXPR 0 v[0] [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X') [L1165] 0 return 0; [L1165] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 286 locations, 71 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 27.3s, OverallIterations: 18, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 20.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8298 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5882 mSDsluCounter, 1801 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1546 mSDsCounter, 593 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13636 IncrementalHoareTripleChecker+Invalid, 14229 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 593 mSolverCounterUnsat, 255 mSDtfsCounter, 13636 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=395occurred in iteration=16, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 361 NumberOfCodeBlocks, 361 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 299 ConstructedInterpolants, 0 QuantifiedInterpolants, 5054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 21:30:48,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f --- 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-2329fc7 [2022-12-13 21:30:50,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:30:50,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:30:50,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:30:50,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:30:50,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:30:50,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:30:50,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:30:50,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:30:50,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:30:50,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:30:50,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:30:50,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:30:50,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:30:50,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:30:50,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:30:50,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:30:50,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:30:50,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:30:50,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:30:50,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:30:50,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:30:50,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:30:50,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:30:50,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:30:50,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:30:50,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:30:50,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:30:50,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:30:50,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:30:50,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:30:50,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:30:50,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:30:50,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:30:50,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:30:50,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:30:50,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:30:50,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:30:50,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:30:50,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:30:50,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:30:50,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 21:30:50,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:30:50,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:30:50,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:30:50,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:30:50,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:30:50,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:30:50,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:30:50,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:30:50,129 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:30:50,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:30:50,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:30:50,129 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 21:30:50,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 21:30:50,130 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 21:30:50,131 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 21:30:50,131 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:30:50,131 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:30:50,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:30:50,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:30:50,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:30:50,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:30:50,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:30:50,132 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f [2022-12-13 21:30:50,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:30:50,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:30:50,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:30:50,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:30:50,381 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:30:50,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/singleton.i [2022-12-13 21:30:52,943 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:30:53,177 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:30:53,178 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/sv-benchmarks/c/pthread/singleton.i [2022-12-13 21:30:53,191 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data/c5ad3d02b/b78e3cbdbbf14949a6439b297c235bdd/FLAGae13caa9b [2022-12-13 21:30:53,206 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/data/c5ad3d02b/b78e3cbdbbf14949a6439b297c235bdd [2022-12-13 21:30:53,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:30:53,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:30:53,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:30:53,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:30:53,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:30:53,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d59875c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53, skipping insertion in model container [2022-12-13 21:30:53,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:30:53,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:30:53,447 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 21:30:53,681 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-12-13 21:30:53,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:53,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:53,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:53,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:53,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:30:53,714 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:30:53,728 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 21:30:53,760 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_145e2c52-49fc-437e-9a2f-0640a7f4eee7/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-12-13 21:30:53,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:53,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:53,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:30:53,768 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:30:53,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:30:53,817 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:30:53,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53 WrapperNode [2022-12-13 21:30:53,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:30:53,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:30:53,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:30:53,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:30:53,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,851 INFO L138 Inliner]: procedures = 328, calls = 52, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2022-12-13 21:30:53,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:30:53,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:30:53,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:30:53,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:30:53,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,870 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:30:53,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:30:53,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:30:53,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:30:53,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (1/1) ... [2022-12-13 21:30:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:30:53,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:30:53,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:30:53,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:30:53,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-13 21:30:53,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 21:30:53,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:30:53,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-12-13 21:30:53,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-12-13 21:30:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:30:53,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:30:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:30:53,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:30:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:30:53,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:30:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 21:30:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:30:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:30:53,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:30:53,940 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 21:30:54,070 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:30:54,072 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:30:54,396 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:30:54,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:30:54,403 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 21:30:54,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:30:54 BoogieIcfgContainer [2022-12-13 21:30:54,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:30:54,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:30:54,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:30:54,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:30:54,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:30:53" (1/3) ... [2022-12-13 21:30:54,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e535af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:30:54, skipping insertion in model container [2022-12-13 21:30:54,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:30:53" (2/3) ... [2022-12-13 21:30:54,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e535af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:30:54, skipping insertion in model container [2022-12-13 21:30:54,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:30:54" (3/3) ... [2022-12-13 21:30:54,414 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2022-12-13 21:30:54,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:30:54,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-13 21:30:54,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:30:54,539 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-12-13 21:30:54,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 249 transitions, 605 flow [2022-12-13 21:30:54,610 INFO L130 PetriNetUnfolder]: 6/170 cut-off events. [2022-12-13 21:30:54,610 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:30:54,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 170 events. 6/170 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 162 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-13 21:30:54,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 249 transitions, 605 flow [2022-12-13 21:30:54,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 165 transitions, 381 flow [2022-12-13 21:30:54,621 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:30:54,629 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 165 transitions, 381 flow [2022-12-13 21:30:54,631 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 165 transitions, 381 flow [2022-12-13 21:30:54,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 165 transitions, 381 flow [2022-12-13 21:30:54,661 INFO L130 PetriNetUnfolder]: 6/165 cut-off events. [2022-12-13 21:30:54,661 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:30:54,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 165 events. 6/165 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 162 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-13 21:30:54,663 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2022-12-13 21:31:03,457 INFO L134 LiptonReduction]: Checked pairs total: 6813 [2022-12-13 21:31:03,457 INFO L136 LiptonReduction]: Total number of compositions: 130 [2022-12-13 21:31:03,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:31:03,472 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=PETRI_NET, 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;@723745d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:31:03,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-12-13 21:31:03,473 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 21:31:03,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:31:03,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:03,474 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 21:31:03,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 628, now seen corresponding path program 1 times [2022-12-13 21:31:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:03,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060412134] [2022-12-13 21:31:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:03,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:03,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 21:31:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:03,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 21:31:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:03,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:03,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060412134] [2022-12-13 21:31:03,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060412134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:03,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:03,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 21:31:03,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591824695] [2022-12-13 21:31:03,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:03,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:31:03,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:31:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:31:03,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 381 [2022-12-13 21:31:03,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 221 flow. Second operand has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:03,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:03,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 381 [2022-12-13 21:31:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:05,974 INFO L130 PetriNetUnfolder]: 19442/26675 cut-off events. [2022-12-13 21:31:05,974 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2022-12-13 21:31:06,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53378 conditions, 26675 events. 19442/26675 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145280 event pairs, 19098 based on Foata normal form. 0/9495 useless extension candidates. Maximal degree in co-relation 53353. Up to 25317 conditions per place. [2022-12-13 21:31:06,152 INFO L137 encePairwiseOnDemand]: 379/381 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-12-13 21:31:06,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2022-12-13 21:31:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:31:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 21:31:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-12-13 21:31:06,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6601049868766404 [2022-12-13 21:31:06,168 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-12-13 21:31:06,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-12-13 21:31:06,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:06,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-12-13 21:31:06,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:06,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:06,184 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:06,186 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 503 transitions. [2022-12-13 21:31:06,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2022-12-13 21:31:06,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 21:31:06,225 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2022-12-13 21:31:06,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-12-13 21:31:06,231 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-12-13 21:31:06,232 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2022-12-13 21:31:06,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:06,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:06,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:31:06,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:06,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:06,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash 619573, now seen corresponding path program 1 times [2022-12-13 21:31:06,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:06,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250882110] [2022-12-13 21:31:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:06,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:06,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:06,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 21:31:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:06,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:31:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:06,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:06,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:06,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250882110] [2022-12-13 21:31:06,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250882110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:06,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:06,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:31:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902408996] [2022-12-13 21:31:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:31:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:31:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:31:06,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 381 [2022-12-13 21:31:06,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:06,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:06,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 381 [2022-12-13 21:31:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:08,465 INFO L130 PetriNetUnfolder]: 14221/19662 cut-off events. [2022-12-13 21:31:08,465 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 21:31:08,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38569 conditions, 19662 events. 14221/19662 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104193 event pairs, 13953 based on Foata normal form. 0/7501 useless extension candidates. Maximal degree in co-relation 38566. Up to 18606 conditions per place. [2022-12-13 21:31:08,549 INFO L137 encePairwiseOnDemand]: 372/381 looper letters, 69 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2022-12-13 21:31:08,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 360 flow [2022-12-13 21:31:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2022-12-13 21:31:08,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5931758530183727 [2022-12-13 21:31:08,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2022-12-13 21:31:08,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2022-12-13 21:31:08,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:08,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2022-12-13 21:31:08,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:08,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:08,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:08,559 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 678 transitions. [2022-12-13 21:31:08,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 360 flow [2022-12-13 21:31:08,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:31:08,562 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2022-12-13 21:31:08,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2022-12-13 21:31:08,563 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-12-13 21:31:08,563 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2022-12-13 21:31:08,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:08,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:08,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:31:08,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:08,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 619574, now seen corresponding path program 1 times [2022-12-13 21:31:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129425855] [2022-12-13 21:31:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:08,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:08,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:08,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 21:31:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:31:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:08,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:08,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:08,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129425855] [2022-12-13 21:31:08,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129425855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:08,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:08,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:31:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942538104] [2022-12-13 21:31:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:08,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:31:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:31:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:31:09,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 381 [2022-12-13 21:31:09,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:09,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:09,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 381 [2022-12-13 21:31:09,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:11,234 INFO L130 PetriNetUnfolder]: 17986/24906 cut-off events. [2022-12-13 21:31:11,234 INFO L131 PetriNetUnfolder]: For 1778/1780 co-relation queries the response was YES. [2022-12-13 21:31:11,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50665 conditions, 24906 events. 17986/24906 cut-off events. For 1778/1780 co-relation queries the response was YES. Maximal size of possible extension queue 1698. Compared 142037 event pairs, 12497 based on Foata normal form. 1/10829 useless extension candidates. Maximal degree in co-relation 50660. Up to 17184 conditions per place. [2022-12-13 21:31:11,321 INFO L137 encePairwiseOnDemand]: 369/381 looper letters, 123 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2022-12-13 21:31:11,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 152 transitions, 669 flow [2022-12-13 21:31:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2022-12-13 21:31:11,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535433070866141 [2022-12-13 21:31:11,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2022-12-13 21:31:11,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2022-12-13 21:31:11,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:11,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2022-12-13 21:31:11,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:11,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:11,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:11,327 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 747 transitions. [2022-12-13 21:31:11,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 152 transitions, 669 flow [2022-12-13 21:31:11,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 651 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:11,335 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 319 flow [2022-12-13 21:31:11,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2022-12-13 21:31:11,335 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-12-13 21:31:11,336 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 319 flow [2022-12-13 21:31:11,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:11,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:11,336 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:31:11,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:11,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 19205128, now seen corresponding path program 1 times [2022-12-13 21:31:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422772152] [2022-12-13 21:31:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:11,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:11,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:11,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:11,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 21:31:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:31:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:11,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:11,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:11,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 21:31:11,712 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:31:11,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 21:31:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:11,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:11,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422772152] [2022-12-13 21:31:11,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422772152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:11,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:11,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:31:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908841548] [2022-12-13 21:31:11,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:31:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:31:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:31:12,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-12-13 21:31:12,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:12,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:12,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-12-13 21:31:12,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:14,053 INFO L130 PetriNetUnfolder]: 12757/18207 cut-off events. [2022-12-13 21:31:14,053 INFO L131 PetriNetUnfolder]: For 10489/10489 co-relation queries the response was YES. [2022-12-13 21:31:14,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40151 conditions, 18207 events. 12757/18207 cut-off events. For 10489/10489 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102651 event pairs, 12483 based on Foata normal form. 1470/8991 useless extension candidates. Maximal degree in co-relation 40145. Up to 17145 conditions per place. [2022-12-13 21:31:14,161 INFO L137 encePairwiseOnDemand]: 372/381 looper letters, 71 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2022-12-13 21:31:14,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 486 flow [2022-12-13 21:31:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:31:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:31:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2022-12-13 21:31:14,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5675853018372703 [2022-12-13 21:31:14,166 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2022-12-13 21:31:14,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2022-12-13 21:31:14,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:14,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2022-12-13 21:31:14,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:14,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:14,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:14,178 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 319 flow. Second operand 4 states and 865 transitions. [2022-12-13 21:31:14,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 486 flow [2022-12-13 21:31:14,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:14,190 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 309 flow [2022-12-13 21:31:14,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=309, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2022-12-13 21:31:14,192 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-12-13 21:31:14,192 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 309 flow [2022-12-13 21:31:14,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:14,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:14,193 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:14,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 21:31:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:14,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2097029646, now seen corresponding path program 1 times [2022-12-13 21:31:14,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:14,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524349008] [2022-12-13 21:31:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:14,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:14,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:14,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:14,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 21:31:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 21:31:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:14,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:14,546 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:14,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:14,624 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:14,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:14,679 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:14,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:14,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:14,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524349008] [2022-12-13 21:31:14,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524349008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:14,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:14,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:31:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697779496] [2022-12-13 21:31:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:14,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:31:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:31:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:31:15,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 381 [2022-12-13 21:31:15,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:15,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:15,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 381 [2022-12-13 21:31:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:16,222 INFO L130 PetriNetUnfolder]: 12751/18192 cut-off events. [2022-12-13 21:31:16,222 INFO L131 PetriNetUnfolder]: For 4617/4617 co-relation queries the response was YES. [2022-12-13 21:31:16,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38649 conditions, 18192 events. 12751/18192 cut-off events. For 4617/4617 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102723 event pairs, 12479 based on Foata normal form. 0/7515 useless extension candidates. Maximal degree in co-relation 38643. Up to 17124 conditions per place. [2022-12-13 21:31:16,289 INFO L137 encePairwiseOnDemand]: 376/381 looper letters, 77 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2022-12-13 21:31:16,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 467 flow [2022-12-13 21:31:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:31:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:31:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 842 transitions. [2022-12-13 21:31:16,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.55249343832021 [2022-12-13 21:31:16,292 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 842 transitions. [2022-12-13 21:31:16,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 842 transitions. [2022-12-13 21:31:16,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:16,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 842 transitions. [2022-12-13 21:31:16,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:16,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:16,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:16,296 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 309 flow. Second operand 4 states and 842 transitions. [2022-12-13 21:31:16,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 467 flow [2022-12-13 21:31:16,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 455 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:16,301 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 295 flow [2022-12-13 21:31:16,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2022-12-13 21:31:16,301 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2022-12-13 21:31:16,301 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 295 flow [2022-12-13 21:31:16,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:16,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:16,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:16,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 21:31:16,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:16,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2097029645, now seen corresponding path program 1 times [2022-12-13 21:31:16,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:16,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117344410] [2022-12-13 21:31:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:16,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:16,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:16,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 21:31:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 21:31:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:16,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:16,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:16,677 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:16,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:16,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:16,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:16,722 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:16,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:16,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:16,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:16,749 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:31:16,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 21:31:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:16,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:16,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117344410] [2022-12-13 21:31:16,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117344410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:16,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:16,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:31:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531350120] [2022-12-13 21:31:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:31:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:31:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:31:17,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 381 [2022-12-13 21:31:17,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:17,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:17,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 381 [2022-12-13 21:31:17,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:18,208 INFO L130 PetriNetUnfolder]: 12745/18177 cut-off events. [2022-12-13 21:31:18,208 INFO L131 PetriNetUnfolder]: For 4614/4614 co-relation queries the response was YES. [2022-12-13 21:31:18,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38597 conditions, 18177 events. 12745/18177 cut-off events. For 4614/4614 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102757 event pairs, 12475 based on Foata normal form. 0/7509 useless extension candidates. Maximal degree in co-relation 38591. Up to 17103 conditions per place. [2022-12-13 21:31:18,271 INFO L137 encePairwiseOnDemand]: 377/381 looper letters, 69 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2022-12-13 21:31:18,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 427 flow [2022-12-13 21:31:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2022-12-13 21:31:18,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5756780402449694 [2022-12-13 21:31:18,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2022-12-13 21:31:18,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2022-12-13 21:31:18,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:18,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2022-12-13 21:31:18,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:18,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:18,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:18,276 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 295 flow. Second operand 3 states and 658 transitions. [2022-12-13 21:31:18,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 427 flow [2022-12-13 21:31:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:31:18,281 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 281 flow [2022-12-13 21:31:18,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2022-12-13 21:31:18,281 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -11 predicate places. [2022-12-13 21:31:18,282 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 281 flow [2022-12-13 21:31:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:18,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:18,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:18,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 21:31:18,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:18,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1304479127, now seen corresponding path program 1 times [2022-12-13 21:31:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744818829] [2022-12-13 21:31:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:18,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:18,489 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:18,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 21:31:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:31:18,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:18,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:18,698 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:18,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:18,713 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:18,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:18,730 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:18,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:18,746 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 21:31:18,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:18,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:18,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744818829] [2022-12-13 21:31:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744818829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:18,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:18,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:31:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991538474] [2022-12-13 21:31:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:31:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:31:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:31:18,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 381 [2022-12-13 21:31:18,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:18,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:18,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 381 [2022-12-13 21:31:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:19,862 INFO L130 PetriNetUnfolder]: 10184/14845 cut-off events. [2022-12-13 21:31:19,862 INFO L131 PetriNetUnfolder]: For 3840/3840 co-relation queries the response was YES. [2022-12-13 21:31:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31419 conditions, 14845 events. 10184/14845 cut-off events. For 3840/3840 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 83952 event pairs, 9914 based on Foata normal form. 0/6484 useless extension candidates. Maximal degree in co-relation 31413. Up to 13771 conditions per place. [2022-12-13 21:31:19,902 INFO L137 encePairwiseOnDemand]: 377/381 looper letters, 69 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2022-12-13 21:31:19,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 427 flow [2022-12-13 21:31:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-12-13 21:31:19,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5826771653543307 [2022-12-13 21:31:19,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-12-13 21:31:19,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-12-13 21:31:19,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:19,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-12-13 21:31:19,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:19,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:19,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:19,906 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 281 flow. Second operand 3 states and 666 transitions. [2022-12-13 21:31:19,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 427 flow [2022-12-13 21:31:19,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:19,908 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 279 flow [2022-12-13 21:31:19,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2022-12-13 21:31:19,909 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-12-13 21:31:19,909 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 279 flow [2022-12-13 21:31:19,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:19,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:19,909 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:19,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:20,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:20,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1304479128, now seen corresponding path program 1 times [2022-12-13 21:31:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:20,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334412463] [2022-12-13 21:31:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:20,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:20,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:20,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 21:31:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 21:31:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:20,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:20,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:20,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:20,355 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:20,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:20,391 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:20,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:20,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:20,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:20,433 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:31:20,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 21:31:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:20,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:20,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:20,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334412463] [2022-12-13 21:31:20,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334412463] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:20,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:20,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:31:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602326081] [2022-12-13 21:31:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:31:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:31:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:31:21,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 381 [2022-12-13 21:31:21,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:21,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:21,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 381 [2022-12-13 21:31:21,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:22,377 INFO L130 PetriNetUnfolder]: 7623/11513 cut-off events. [2022-12-13 21:31:22,377 INFO L131 PetriNetUnfolder]: For 3067/3067 co-relation queries the response was YES. [2022-12-13 21:31:22,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24242 conditions, 11513 events. 7623/11513 cut-off events. For 3067/3067 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66017 event pairs, 7346 based on Foata normal form. 0/5459 useless extension candidates. Maximal degree in co-relation 24236. Up to 10417 conditions per place. [2022-12-13 21:31:22,416 INFO L137 encePairwiseOnDemand]: 375/381 looper letters, 67 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2022-12-13 21:31:22,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 448 flow [2022-12-13 21:31:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:31:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:31:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1045 transitions. [2022-12-13 21:31:22,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5485564304461942 [2022-12-13 21:31:22,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1045 transitions. [2022-12-13 21:31:22,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1045 transitions. [2022-12-13 21:31:22,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:22,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1045 transitions. [2022-12-13 21:31:22,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:22,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:22,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:22,423 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 279 flow. Second operand 5 states and 1045 transitions. [2022-12-13 21:31:22,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 448 flow [2022-12-13 21:31:22,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:22,426 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 283 flow [2022-12-13 21:31:22,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-12-13 21:31:22,427 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-12-13 21:31:22,427 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 283 flow [2022-12-13 21:31:22,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:22,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:22,427 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:22,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:22,629 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:22,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2054789999, now seen corresponding path program 1 times [2022-12-13 21:31:22,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:22,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912105007] [2022-12-13 21:31:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:22,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:22,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:22,634 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:22,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 21:31:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:31:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:22,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:22,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:22,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:22,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912105007] [2022-12-13 21:31:22,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912105007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:22,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:22,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:31:22,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167700974] [2022-12-13 21:31:22,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:22,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:31:22,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:22,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:31:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:31:22,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 381 [2022-12-13 21:31:22,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:22,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:22,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 381 [2022-12-13 21:31:22,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:23,273 INFO L130 PetriNetUnfolder]: 2581/4203 cut-off events. [2022-12-13 21:31:23,273 INFO L131 PetriNetUnfolder]: For 1239/1239 co-relation queries the response was YES. [2022-12-13 21:31:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8889 conditions, 4203 events. 2581/4203 cut-off events. For 1239/1239 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21815 event pairs, 2443 based on Foata normal form. 0/2451 useless extension candidates. Maximal degree in co-relation 8883. Up to 3690 conditions per place. [2022-12-13 21:31:23,284 INFO L137 encePairwiseOnDemand]: 375/381 looper letters, 66 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-12-13 21:31:23,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 417 flow [2022-12-13 21:31:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-12-13 21:31:23,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5914260717410323 [2022-12-13 21:31:23,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-12-13 21:31:23,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-12-13 21:31:23,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:23,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-12-13 21:31:23,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,299 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 283 flow. Second operand 3 states and 676 transitions. [2022-12-13 21:31:23,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 417 flow [2022-12-13 21:31:23,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 403 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:31:23,300 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 263 flow [2022-12-13 21:31:23,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2022-12-13 21:31:23,301 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -20 predicate places. [2022-12-13 21:31:23,301 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 263 flow [2022-12-13 21:31:23,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:23,301 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:23,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 21:31:23,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:23,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2054789998, now seen corresponding path program 1 times [2022-12-13 21:31:23,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277635778] [2022-12-13 21:31:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:23,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:23,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:23,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 21:31:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:31:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:23,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:23,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:23,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:23,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277635778] [2022-12-13 21:31:23,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277635778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:23,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:23,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:31:23,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715134063] [2022-12-13 21:31:23,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:23,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:31:23,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:23,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:31:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:31:23,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 381 [2022-12-13 21:31:23,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:23,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 381 [2022-12-13 21:31:23,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:23,947 INFO L130 PetriNetUnfolder]: 577/1134 cut-off events. [2022-12-13 21:31:23,947 INFO L131 PetriNetUnfolder]: For 407/407 co-relation queries the response was YES. [2022-12-13 21:31:23,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 1134 events. 577/1134 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4824 event pairs, 514 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 2445. Up to 884 conditions per place. [2022-12-13 21:31:23,950 INFO L137 encePairwiseOnDemand]: 374/381 looper letters, 56 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2022-12-13 21:31:23,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 383 flow [2022-12-13 21:31:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-12-13 21:31:23,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5590551181102362 [2022-12-13 21:31:23,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-12-13 21:31:23,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-12-13 21:31:23,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:23,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-12-13 21:31:23,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,954 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 263 flow. Second operand 3 states and 639 transitions. [2022-12-13 21:31:23,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 383 flow [2022-12-13 21:31:23,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:31:23,956 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 261 flow [2022-12-13 21:31:23,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2022-12-13 21:31:23,956 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -23 predicate places. [2022-12-13 21:31:23,956 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 261 flow [2022-12-13 21:31:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:23,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:23,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:23,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 21:31:24,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:24,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2054790054, now seen corresponding path program 1 times [2022-12-13 21:31:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:24,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786348299] [2022-12-13 21:31:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:24,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:24,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:24,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:24,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 21:31:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:31:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:24,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:24,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:24,373 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:24,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:24,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:24,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:24,414 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:31:24,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 21:31:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:24,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:24,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:24,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:24,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786348299] [2022-12-13 21:31:24,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786348299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:24,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:24,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:31:24,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684695712] [2022-12-13 21:31:24,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:24,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:31:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:24,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:31:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:31:25,221 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 381 [2022-12-13 21:31:25,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:25,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:25,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 381 [2022-12-13 21:31:25,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:25,527 INFO L130 PetriNetUnfolder]: 611/1108 cut-off events. [2022-12-13 21:31:25,527 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-12-13 21:31:25,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 1108 events. 611/1108 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4228 event pairs, 546 based on Foata normal form. 0/952 useless extension candidates. Maximal degree in co-relation 2488. Up to 927 conditions per place. [2022-12-13 21:31:25,530 INFO L137 encePairwiseOnDemand]: 373/381 looper letters, 57 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2022-12-13 21:31:25,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 406 flow [2022-12-13 21:31:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:31:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:31:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1037 transitions. [2022-12-13 21:31:25,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5443569553805774 [2022-12-13 21:31:25,532 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1037 transitions. [2022-12-13 21:31:25,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1037 transitions. [2022-12-13 21:31:25,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:25,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1037 transitions. [2022-12-13 21:31:25,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.4) internal successors, (1037), 5 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:25,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:25,535 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:25,535 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 261 flow. Second operand 5 states and 1037 transitions. [2022-12-13 21:31:25,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 406 flow [2022-12-13 21:31:25,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:25,536 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 259 flow [2022-12-13 21:31:25,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2022-12-13 21:31:25,537 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -25 predicate places. [2022-12-13 21:31:25,537 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 259 flow [2022-12-13 21:31:25,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:25,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:25,537 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:25,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 21:31:25,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:25,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1031698965, now seen corresponding path program 1 times [2022-12-13 21:31:25,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223151494] [2022-12-13 21:31:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:25,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:25,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:25,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 21:31:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 21:31:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:25,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:25,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:25,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:25,964 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:31:25,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 21:31:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:26,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:26,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:26,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223151494] [2022-12-13 21:31:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223151494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:26,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:26,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:31:26,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978768421] [2022-12-13 21:31:26,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:26,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:31:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:26,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:31:26,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:31:27,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-12-13 21:31:27,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:27,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:27,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-12-13 21:31:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:27,260 INFO L130 PetriNetUnfolder]: 551/1000 cut-off events. [2022-12-13 21:31:27,260 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2022-12-13 21:31:27,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 1000 events. 551/1000 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3704 event pairs, 490 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2265. Up to 851 conditions per place. [2022-12-13 21:31:27,263 INFO L137 encePairwiseOnDemand]: 373/381 looper letters, 54 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2022-12-13 21:31:27,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 388 flow [2022-12-13 21:31:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:31:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:31:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2022-12-13 21:31:27,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5448818897637795 [2022-12-13 21:31:27,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2022-12-13 21:31:27,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2022-12-13 21:31:27,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:27,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2022-12-13 21:31:27,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:27,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:27,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 381.0) internal successors, (2286), 6 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:27,270 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 259 flow. Second operand 5 states and 1038 transitions. [2022-12-13 21:31:27,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 388 flow [2022-12-13 21:31:27,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 374 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:31:27,273 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 249 flow [2022-12-13 21:31:27,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2022-12-13 21:31:27,273 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2022-12-13 21:31:27,273 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 249 flow [2022-12-13 21:31:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:27,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:27,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:27,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 21:31:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:27,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 674755380, now seen corresponding path program 1 times [2022-12-13 21:31:27,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:27,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804400269] [2022-12-13 21:31:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:27,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:27,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:27,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 21:31:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 21:31:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:27,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:27,640 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 21:31:27,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:27,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:27,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804400269] [2022-12-13 21:31:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804400269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:27,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:27,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:31:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310893993] [2022-12-13 21:31:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:27,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:31:27,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:31:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:31:27,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 381 [2022-12-13 21:31:27,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:27,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:27,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 381 [2022-12-13 21:31:27,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:28,050 INFO L130 PetriNetUnfolder]: 496/915 cut-off events. [2022-12-13 21:31:28,050 INFO L131 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2022-12-13 21:31:28,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 915 events. 496/915 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3315 event pairs, 436 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 2067. Up to 762 conditions per place. [2022-12-13 21:31:28,052 INFO L137 encePairwiseOnDemand]: 377/381 looper letters, 52 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2022-12-13 21:31:28,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 361 flow [2022-12-13 21:31:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:31:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:31:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2022-12-13 21:31:28,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5686789151356081 [2022-12-13 21:31:28,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2022-12-13 21:31:28,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2022-12-13 21:31:28,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:28,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2022-12-13 21:31:28,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,056 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 249 flow. Second operand 3 states and 650 transitions. [2022-12-13 21:31:28,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 361 flow [2022-12-13 21:31:28,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 349 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:31:28,057 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 239 flow [2022-12-13 21:31:28,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2022-12-13 21:31:28,058 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -33 predicate places. [2022-12-13 21:31:28,058 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 239 flow [2022-12-13 21:31:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:28,058 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:28,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 21:31:28,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:28,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:28,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:28,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1000351605, now seen corresponding path program 1 times [2022-12-13 21:31:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595621407] [2022-12-13 21:31:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:28,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:28,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 21:31:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:31:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:28,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:28,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 21:31:28,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:28,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 21:31:28,421 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:31:28,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 21:31:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:28,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:28,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:28,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595621407] [2022-12-13 21:31:28,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595621407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:28,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:28,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:31:28,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910376413] [2022-12-13 21:31:28,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:28,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:31:28,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:31:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:31:28,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 381 [2022-12-13 21:31:28,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:28,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 381 [2022-12-13 21:31:28,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:28,980 INFO L130 PetriNetUnfolder]: 452/841 cut-off events. [2022-12-13 21:31:28,980 INFO L131 PetriNetUnfolder]: For 327/327 co-relation queries the response was YES. [2022-12-13 21:31:28,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 841 events. 452/841 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2949 event pairs, 391 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 1903. Up to 694 conditions per place. [2022-12-13 21:31:28,982 INFO L137 encePairwiseOnDemand]: 376/381 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2022-12-13 21:31:28,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 364 flow [2022-12-13 21:31:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:31:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:31:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2022-12-13 21:31:28,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5511811023622047 [2022-12-13 21:31:28,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2022-12-13 21:31:28,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2022-12-13 21:31:28,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:28,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2022-12-13 21:31:28,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,987 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,987 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 239 flow. Second operand 4 states and 840 transitions. [2022-12-13 21:31:28,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 364 flow [2022-12-13 21:31:28,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:31:28,988 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 239 flow [2022-12-13 21:31:28,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2022-12-13 21:31:28,989 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2022-12-13 21:31:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 239 flow [2022-12-13 21:31:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:28,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:28,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:29,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 21:31:29,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:29,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1028101710, now seen corresponding path program 1 times [2022-12-13 21:31:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:29,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498125419] [2022-12-13 21:31:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:29,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:29,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:29,196 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:29,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 21:31:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 21:31:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:29,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:29,461 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:29,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:29,519 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:29,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:29,572 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:29,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:29,618 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:29,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:29,658 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-12-13 21:31:29,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 40 [2022-12-13 21:31:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:29,761 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 21:31:29,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 44 [2022-12-13 21:31:31,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2022-12-13 21:31:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:31,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:31,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:31,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498125419] [2022-12-13 21:31:31,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498125419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:31,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:31,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:31:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871489345] [2022-12-13 21:31:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:31:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:31:31,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:31:34,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 381 [2022-12-13 21:31:34,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 193.625) internal successors, (1549), 8 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:34,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:34,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 381 [2022-12-13 21:31:34,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:35,188 INFO L130 PetriNetUnfolder]: 451/839 cut-off events. [2022-12-13 21:31:35,188 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2022-12-13 21:31:35,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1908 conditions, 839 events. 451/839 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2941 event pairs, 391 based on Foata normal form. 1/789 useless extension candidates. Maximal degree in co-relation 1902. Up to 700 conditions per place. [2022-12-13 21:31:35,190 INFO L137 encePairwiseOnDemand]: 376/381 looper letters, 49 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2022-12-13 21:31:35,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 354 flow [2022-12-13 21:31:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:31:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:31:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2022-12-13 21:31:35,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5288713910761155 [2022-12-13 21:31:35,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2022-12-13 21:31:35,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2022-12-13 21:31:35,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:35,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2022-12-13 21:31:35,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:35,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:35,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:35,195 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 239 flow. Second operand 4 states and 806 transitions. [2022-12-13 21:31:35,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 354 flow [2022-12-13 21:31:35,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:31:35,197 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 246 flow [2022-12-13 21:31:35,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2022-12-13 21:31:35,197 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -33 predicate places. [2022-12-13 21:31:35,197 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 246 flow [2022-12-13 21:31:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.625) internal successors, (1549), 8 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:35,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:35,198 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:35,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 21:31:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:35,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1806384070, now seen corresponding path program 1 times [2022-12-13 21:31:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:35,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140863691] [2022-12-13 21:31:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:35,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:35,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:35,404 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:35,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 21:31:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 21:31:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:35,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:35,628 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:35,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:35,693 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:35,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:35,800 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:35,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:35,875 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:35,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:35,960 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:35,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:36,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:36,083 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 21:31:36,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 21:31:37,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2022-12-13 21:31:37,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:37,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:37,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140863691] [2022-12-13 21:31:37,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140863691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:37,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:37,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:31:37,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122498866] [2022-12-13 21:31:37,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:37,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:31:37,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:31:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:31:40,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 381 [2022-12-13 21:31:40,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:40,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:40,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 381 [2022-12-13 21:31:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:41,010 INFO L130 PetriNetUnfolder]: 445/832 cut-off events. [2022-12-13 21:31:41,010 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2022-12-13 21:31:41,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 832 events. 445/832 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2929 event pairs, 385 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 1887. Up to 689 conditions per place. [2022-12-13 21:31:41,013 INFO L137 encePairwiseOnDemand]: 374/381 looper letters, 48 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2022-12-13 21:31:41,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 380 flow [2022-12-13 21:31:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:31:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:31:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1200 transitions. [2022-12-13 21:31:41,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5249343832020997 [2022-12-13 21:31:41,016 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1200 transitions. [2022-12-13 21:31:41,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1200 transitions. [2022-12-13 21:31:41,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:41,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1200 transitions. [2022-12-13 21:31:41,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:41,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:41,020 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:41,020 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 246 flow. Second operand 6 states and 1200 transitions. [2022-12-13 21:31:41,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 380 flow [2022-12-13 21:31:41,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 370 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:31:41,022 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 262 flow [2022-12-13 21:31:41,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2022-12-13 21:31:41,022 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2022-12-13 21:31:41,022 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 262 flow [2022-12-13 21:31:41,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:41,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:41,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:41,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 21:31:41,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:41,224 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -163336182, now seen corresponding path program 1 times [2022-12-13 21:31:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660058287] [2022-12-13 21:31:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:41,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:41,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:41,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 21:31:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 21:31:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:41,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:41,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:41,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:41,589 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:41,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:41,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:41,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:41,675 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:41,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:41,702 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:41,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:41,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:42,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:42,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:42,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:42,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:42,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660058287] [2022-12-13 21:31:42,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660058287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:42,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:42,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 21:31:42,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639691141] [2022-12-13 21:31:42,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:42,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 21:31:42,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 21:31:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:31:44,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 381 [2022-12-13 21:31:44,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 191.2) internal successors, (1912), 10 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:44,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:44,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 381 [2022-12-13 21:31:44,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:45,454 INFO L130 PetriNetUnfolder]: 444/830 cut-off events. [2022-12-13 21:31:45,454 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2022-12-13 21:31:45,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 830 events. 444/830 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2921 event pairs, 384 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 1898. Up to 688 conditions per place. [2022-12-13 21:31:45,456 INFO L137 encePairwiseOnDemand]: 373/381 looper letters, 49 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2022-12-13 21:31:45,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 408 flow [2022-12-13 21:31:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:31:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:31:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1555 transitions. [2022-12-13 21:31:45,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5101706036745407 [2022-12-13 21:31:45,458 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1555 transitions. [2022-12-13 21:31:45,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1555 transitions. [2022-12-13 21:31:45,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:45,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1555 transitions. [2022-12-13 21:31:45,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.375) internal successors, (1555), 8 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:45,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 381.0) internal successors, (3429), 9 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:45,462 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 381.0) internal successors, (3429), 9 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:45,462 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 262 flow. Second operand 8 states and 1555 transitions. [2022-12-13 21:31:45,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 408 flow [2022-12-13 21:31:45,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 390 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 21:31:45,463 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 272 flow [2022-12-13 21:31:45,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2022-12-13 21:31:45,464 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -27 predicate places. [2022-12-13 21:31:45,464 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 272 flow [2022-12-13 21:31:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 191.2) internal successors, (1912), 10 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:45,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:45,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:45,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:45,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:45,665 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash -768456013, now seen corresponding path program 1 times [2022-12-13 21:31:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:45,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240905658] [2022-12-13 21:31:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:45,671 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:45,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 21:31:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:45,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 21:31:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:45,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:45,897 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:45,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:45,935 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:45,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:45,979 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:45,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:46,067 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:46,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:46,188 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-13 21:31:46,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-13 21:31:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:46,294 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 21:31:46,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 21:31:47,776 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 21:31:47,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 52 [2022-12-13 21:31:48,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:48,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:48,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:48,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:48,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:48,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240905658] [2022-12-13 21:31:48,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240905658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:48,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:48,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 21:31:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403271390] [2022-12-13 21:31:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:31:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:31:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 21:31:52,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 381 [2022-12-13 21:31:52,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 272 flow. Second operand has 12 states, 12 states have (on average 186.83333333333334) internal successors, (2242), 12 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:52,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:52,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 381 [2022-12-13 21:31:52,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:52,999 INFO L130 PetriNetUnfolder]: 443/828 cut-off events. [2022-12-13 21:31:52,999 INFO L131 PetriNetUnfolder]: For 347/347 co-relation queries the response was YES. [2022-12-13 21:31:53,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 828 events. 443/828 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2918 event pairs, 383 based on Foata normal form. 1/778 useless extension candidates. Maximal degree in co-relation 1901. Up to 687 conditions per place. [2022-12-13 21:31:53,002 INFO L137 encePairwiseOnDemand]: 371/381 looper letters, 49 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2022-12-13 21:31:53,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 439 flow [2022-12-13 21:31:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 21:31:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 21:31:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1894 transitions. [2022-12-13 21:31:53,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49711286089238843 [2022-12-13 21:31:53,005 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1894 transitions. [2022-12-13 21:31:53,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1894 transitions. [2022-12-13 21:31:53,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:53,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1894 transitions. [2022-12-13 21:31:53,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 189.4) internal successors, (1894), 10 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:53,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 381.0) internal successors, (4191), 11 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:53,010 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 381.0) internal successors, (4191), 11 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:53,010 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 272 flow. Second operand 10 states and 1894 transitions. [2022-12-13 21:31:53,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 439 flow [2022-12-13 21:31:53,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 417 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 21:31:53,011 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 286 flow [2022-12-13 21:31:53,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2022-12-13 21:31:53,011 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -24 predicate places. [2022-12-13 21:31:53,012 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 286 flow [2022-12-13 21:31:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 186.83333333333334) internal successors, (2242), 12 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:53,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:31:53,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:31:53,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-13 21:31:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:53,213 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:31:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:31:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1947667659, now seen corresponding path program 1 times [2022-12-13 21:31:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:31:53,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884992300] [2022-12-13 21:31:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:31:53,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:31:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:31:53,218 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:31:53,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 21:31:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:31:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 21:31:53,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:31:53,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 21:31:53,469 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:53,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:53,506 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:53,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:53,544 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:53,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:53,601 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:53,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:53,668 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:31:53,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 21:31:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:31:53,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:54,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:54,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:54,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:54,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:54,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 21:31:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:31:54,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:31:54,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:31:54,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884992300] [2022-12-13 21:31:54,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884992300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:31:54,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:31:54,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 21:31:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262808515] [2022-12-13 21:31:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:31:54,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:31:54,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:31:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:31:54,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:31:59,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 381 [2022-12-13 21:31:59,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 182.5) internal successors, (2555), 14 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:59,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:31:59,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 381 [2022-12-13 21:31:59,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:32:00,485 INFO L130 PetriNetUnfolder]: 443/827 cut-off events. [2022-12-13 21:32:00,485 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2022-12-13 21:32:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 827 events. 443/827 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2914 event pairs, 383 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 1906. Up to 683 conditions per place. [2022-12-13 21:32:00,487 INFO L137 encePairwiseOnDemand]: 369/381 looper letters, 44 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2022-12-13 21:32:00,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 447 flow [2022-12-13 21:32:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 21:32:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 21:32:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2033 transitions. [2022-12-13 21:32:00,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48508709138630396 [2022-12-13 21:32:00,490 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2033 transitions. [2022-12-13 21:32:00,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2033 transitions. [2022-12-13 21:32:00,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:32:00,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2033 transitions. [2022-12-13 21:32:00,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.8181818181818) internal successors, (2033), 11 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:00,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 381.0) internal successors, (4572), 12 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:00,496 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 381.0) internal successors, (4572), 12 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:00,496 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 286 flow. Second operand 11 states and 2033 transitions. [2022-12-13 21:32:00,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 447 flow [2022-12-13 21:32:00,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 398 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-12-13 21:32:00,497 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 265 flow [2022-12-13 21:32:00,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=265, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2022-12-13 21:32:00,497 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -28 predicate places. [2022-12-13 21:32:00,497 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 265 flow [2022-12-13 21:32:00,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 182.5) internal successors, (2555), 14 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:32:00,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:32:00,498 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:00,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-13 21:32:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:32:00,699 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 21:32:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:32:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash 108610215, now seen corresponding path program 1 times [2022-12-13 21:32:00,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:32:00,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284351633] [2022-12-13 21:32:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:32:00,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:32:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:32:00,702 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:32:00,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 21:32:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:00,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:32:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:32:01,152 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 21:32:01,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:32:01,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (70 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 71 remaining) [2022-12-13 21:32:01,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 71 remaining) [2022-12-13 21:32:01,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 71 remaining) [2022-12-13 21:32:01,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (34 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 71 remaining) [2022-12-13 21:32:01,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 71 remaining) [2022-12-13 21:32:01,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 71 remaining) [2022-12-13 21:32:01,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 71 remaining) [2022-12-13 21:32:01,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 71 remaining) [2022-12-13 21:32:01,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 21:32:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:32:01,363 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:32:01,380 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 21:32:01,380 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 21:32:01,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 09:32:01 BasicIcfg [2022-12-13 21:32:01,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 21:32:01,451 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 21:32:01,451 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 21:32:01,451 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 21:32:01,452 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:30:54" (3/4) ... [2022-12-13 21:32:01,454 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 21:32:01,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 21:32:01,455 INFO L158 Benchmark]: Toolchain (without parser) took 68245.22ms. Allocated memory was 86.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 62.9MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 714.0MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,455 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory is still 36.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 21:32:01,455 INFO L158 Benchmark]: CACSL2BoogieTranslator took 606.89ms. Allocated memory is still 86.0MB. Free memory was 62.7MB in the beginning and 47.4MB in the end (delta: 15.4MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,455 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.00ms. Allocated memory is still 86.0MB. Free memory was 47.4MB in the beginning and 44.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,456 INFO L158 Benchmark]: Boogie Preprocessor took 21.54ms. Allocated memory is still 86.0MB. Free memory was 44.9MB in the beginning and 42.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,456 INFO L158 Benchmark]: RCFGBuilder took 532.46ms. Allocated memory is still 86.0MB. Free memory was 42.8MB in the beginning and 45.1MB in the end (delta: -2.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,456 INFO L158 Benchmark]: TraceAbstraction took 67042.60ms. Allocated memory was 86.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 44.2MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 691.4MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,456 INFO L158 Benchmark]: Witness Printer took 3.14ms. Allocated memory is still 2.1GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 21:32:01,458 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory is still 36.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 606.89ms. Allocated memory is still 86.0MB. Free memory was 62.7MB in the beginning and 47.4MB in the end (delta: 15.4MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.00ms. Allocated memory is still 86.0MB. Free memory was 47.4MB in the beginning and 44.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.54ms. Allocated memory is still 86.0MB. Free memory was 44.9MB in the beginning and 42.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 532.46ms. Allocated memory is still 86.0MB. Free memory was 42.8MB in the beginning and 45.1MB in the end (delta: -2.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 67042.60ms. Allocated memory was 86.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 44.2MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 691.4MB. Max. memory is 16.1GB. * Witness Printer took 3.14ms. Allocated memory is still 2.1GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.8s, 178 PlacesBefore, 99 PlacesAfterwards, 165 TransitionsBefore, 85 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 46 TrivialSequentialCompositions, 79 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 130 TotalNumberOfCompositions, 6813 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4470, independent: 4221, independent conditional: 0, independent unconditional: 4221, dependent: 249, dependent conditional: 0, dependent unconditional: 249, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1312, independent: 1239, independent conditional: 0, independent unconditional: 1239, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4470, independent: 2982, independent conditional: 0, independent unconditional: 2982, dependent: 176, dependent conditional: 0, dependent unconditional: 176, unknown: 1312, unknown conditional: 0, unknown unconditional: 1312] , Statistics on independence cache: Total cache size (in pairs): 173, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1123. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=1, t={-2147483632:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=2, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1163] 0 \read(t) VAL [\read(t)=1, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=2, t={-2147483632:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1148] 1 \read(t1) VAL [\read(t1)=2, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=2, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=3, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=4, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=5, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=6, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1153] 1 \read(t2) VAL [\read(t2)=3, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=3, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1154] 1 \read(t3) VAL [\read(t3)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1155] 1 \read(t4) VAL [\read(t4)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1156] 1 \read(t5) VAL [\read(t5)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={7:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t2={15:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t3={-1073741808:0}, t4={16:0}, t5={1073741840:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=1, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={-2147483632:0}, v={3:0}] [L1164] EXPR 0 v[0] [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X') [L1165] 0 return 0; [L1165] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1149]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1151]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1147]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1150]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1152]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 287 locations, 71 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 66.8s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 41.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.9s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 8423 SdHoareTripleChecker+Valid, 28.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5697 mSDsluCounter, 951 SdHoareTripleChecker+Invalid, 25.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 599 mSDsCounter, 588 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11588 IncrementalHoareTripleChecker+Invalid, 12178 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 588 mSolverCounterUnsat, 352 mSDtfsCounter, 11588 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=319occurred in iteration=3, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 411 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 347 ConstructedInterpolants, 175 QuantifiedInterpolants, 8769 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2630 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 21:32:01,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145e2c52-49fc-437e-9a2f-0640a7f4eee7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample