./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 4e7fbc69 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS --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-4e7fbc6 [2022-11-23 03:03:43,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:03:43,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:03:43,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:03:43,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:03:43,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:03:43,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:03:43,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:03:43,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:03:43,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:03:43,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:03:43,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:03:43,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:03:43,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:03:43,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:03:43,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:03:43,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:03:43,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:03:43,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:03:43,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:03:43,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:03:43,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:03:43,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:03:43,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:03:43,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:03:43,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:03:43,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:03:43,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:03:43,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:03:43,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:03:43,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:03:43,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:03:43,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:03:43,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:03:43,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:03:43,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:03:43,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:03:43,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:03:43,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:03:43,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:03:43,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:03:43,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:03:43,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:03:43,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:03:43,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:03:43,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:03:43,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:03:43,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:03:43,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:03:43,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:03:43,465 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:03:43,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:03:43,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:03:43,467 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:03:43,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:03:43,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:03:43,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:03:43,468 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:03:43,468 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:03:43,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:03:43,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:03:43,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:03:43,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:03:43,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:03:43,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:03:43,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:03:43,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:03:43,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:03:43,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:03:43,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:03:43,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:03:43,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:03:43,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:03:43,473 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:03:43,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:03:43,473 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f [2022-11-23 03:03:43,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:03:43,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:03:43,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:03:43,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:03:43,784 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:03:43,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/singleton.i [2022-11-23 03:03:46,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:03:47,242 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:03:47,243 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/sv-benchmarks/c/pthread/singleton.i [2022-11-23 03:03:47,261 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data/48d05cc62/1f554aba70b245bd87aa340c60c9c1b5/FLAGbcc29fb71 [2022-11-23 03:03:47,295 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data/48d05cc62/1f554aba70b245bd87aa340c60c9c1b5 [2022-11-23 03:03:47,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:03:47,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:03:47,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:03:47,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:03:47,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:03:47,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:47" (1/1) ... [2022-11-23 03:03:47,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba01fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:47, skipping insertion in model container [2022-11-23 03:03:47,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:47" (1/1) ... [2022-11-23 03:03:47,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:03:47,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:03:47,623 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 03:03:48,004 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-11-23 03:03:48,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:03:48,042 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:03:48,060 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 03:03:48,084 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-11-23 03:03:48,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:03:48,175 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:03:48,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48 WrapperNode [2022-11-23 03:03:48,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:03:48,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:03:48,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:03:48,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:03:48,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,240 INFO L138 Inliner]: procedures = 325, calls = 52, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2022-11-23 03:03:48,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:03:48,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:03:48,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:03:48,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:03:48,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,294 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:03:48,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:03:48,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:03:48,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:03:48,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (1/1) ... [2022-11-23 03:03:48,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:03:48,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:48,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:03:48,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:03:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:03:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:03:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:03:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:03:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:03:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-11-23 03:03:48,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-11-23 03:03:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:03:48,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:03:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:03:48,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:03:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 03:03:48,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 03:03:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:03:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:03:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:03:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:03:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:03:48,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:03:48,430 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:03:48,658 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:03:48,661 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:03:49,018 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:03:49,028 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:03:49,028 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 03:03:49,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:49 BoogieIcfgContainer [2022-11-23 03:03:49,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:03:49,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:03:49,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:03:49,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:03:49,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:03:47" (1/3) ... [2022-11-23 03:03:49,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206e2cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:49, skipping insertion in model container [2022-11-23 03:03:49,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:48" (2/3) ... [2022-11-23 03:03:49,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206e2cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:49, skipping insertion in model container [2022-11-23 03:03:49,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:49" (3/3) ... [2022-11-23 03:03:49,042 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2022-11-23 03:03:49,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:03:49,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-23 03:03:49,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:03:49,310 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-11-23 03:03:49,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 248 transitions, 603 flow [2022-11-23 03:03:49,459 INFO L130 PetriNetUnfolder]: 6/169 cut-off events. [2022-11-23 03:03:49,459 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 03:03:49,466 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. [2022-11-23 03:03:49,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 248 transitions, 603 flow [2022-11-23 03:03:49,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 164 transitions, 379 flow [2022-11-23 03:03:49,477 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:03:49,494 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 164 transitions, 379 flow [2022-11-23 03:03:49,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 164 transitions, 379 flow [2022-11-23 03:03:49,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 164 transitions, 379 flow [2022-11-23 03:03:49,550 INFO L130 PetriNetUnfolder]: 6/164 cut-off events. [2022-11-23 03:03:49,551 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 03:03:49,552 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 172 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. [2022-11-23 03:03:49,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2022-11-23 03:03:54,939 INFO L134 LiptonReduction]: Checked pairs total: 6827 [2022-11-23 03:03:54,940 INFO L136 LiptonReduction]: Total number of compositions: 131 [2022-11-23 03:03:54,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:03:54,966 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;@62e7cfd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:03:54,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-23 03:03:54,968 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-23 03:03:54,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:03:54,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:54,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 03:03:54,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:03:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash 627, now seen corresponding path program 1 times [2022-11-23 03:03:54,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:54,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303464879] [2022-11-23 03:03:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:54,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:55,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:55,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303464879] [2022-11-23 03:03:55,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303464879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:55,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:55,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 03:03:55,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554371921] [2022-11-23 03:03:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:55,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:03:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:03:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:03:55,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 381 [2022-11-23 03:03:55,178 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) [2022-11-23 03:03:55,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:55,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 381 [2022-11-23 03:03:55,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:58,882 INFO L130 PetriNetUnfolder]: 19442/26684 cut-off events. [2022-11-23 03:03:58,882 INFO L131 PetriNetUnfolder]: For 565/565 co-relation queries the response was YES. [2022-11-23 03:03:58,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53387 conditions, 26684 events. 19442/26684 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145126 event pairs, 19098 based on Foata normal form. 0/9507 useless extension candidates. Maximal degree in co-relation 53362. Up to 25317 conditions per place. [2022-11-23 03:03:59,153 INFO L137 encePairwiseOnDemand]: 379/381 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-11-23 03:03:59,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2022-11-23 03:03:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:03:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 03:03:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-11-23 03:03:59,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.65748031496063 [2022-11-23 03:03:59,182 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-11-23 03:03:59,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-11-23 03:03:59,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:59,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-11-23 03:03:59,197 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) [2022-11-23 03:03:59,206 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) [2022-11-23 03:03:59,207 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) [2022-11-23 03:03:59,209 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 501 transitions. [2022-11-23 03:03:59,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2022-11-23 03:03:59,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-23 03:03:59,320 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2022-11-23 03:03:59,322 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} [2022-11-23 03:03:59,328 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-11-23 03:03:59,329 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2022-11-23 03:03:59,330 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) [2022-11-23 03:03:59,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:59,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:03:59,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:03:59,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:03:59,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:59,338 INFO L85 PathProgramCache]: Analyzing trace with hash 618485, now seen corresponding path program 1 times [2022-11-23 03:03:59,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:59,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956703040] [2022-11-23 03:03:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956703040] [2022-11-23 03:03:59,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956703040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:59,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:59,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:03:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356601395] [2022-11-23 03:03:59,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:59,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:03:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:03:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:03:59,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 381 [2022-11-23 03:03:59,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 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) [2022-11-23 03:03:59,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:59,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 381 [2022-11-23 03:03:59,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:02,054 INFO L130 PetriNetUnfolder]: 14219/19666 cut-off events. [2022-11-23 03:04:02,055 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-23 03:04:02,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 19666 events. 14219/19666 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104006 event pairs, 13951 based on Foata normal form. 0/7508 useless extension candidates. Maximal degree in co-relation 38565. Up to 18601 conditions per place. [2022-11-23 03:04:02,187 INFO L137 encePairwiseOnDemand]: 372/381 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2022-11-23 03:04:02,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 358 flow [2022-11-23 03:04:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:04:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:04:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2022-11-23 03:04:02,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5896762904636921 [2022-11-23 03:04:02,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2022-11-23 03:04:02,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2022-11-23 03:04:02,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:02,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2022-11-23 03:04:02,196 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) [2022-11-23 03:04:02,200 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) [2022-11-23 03:04:02,201 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) [2022-11-23 03:04:02,201 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 674 transitions. [2022-11-23 03:04:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 358 flow [2022-11-23 03:04:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:04:02,206 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2022-11-23 03:04:02,207 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} [2022-11-23 03:04:02,208 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-11-23 03:04:02,208 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2022-11-23 03:04:02,209 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) [2022-11-23 03:04:02,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:02,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:04:02,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:04:02,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:02,214 INFO L85 PathProgramCache]: Analyzing trace with hash 618486, now seen corresponding path program 1 times [2022-11-23 03:04:02,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:02,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224425447] [2022-11-23 03:04:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:02,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224425447] [2022-11-23 03:04:02,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224425447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:02,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:02,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:04:02,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347786804] [2022-11-23 03:04:02,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:04:02,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:04:02,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:04:02,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 381 [2022-11-23 03:04:02,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 241 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) [2022-11-23 03:04:02,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:02,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 381 [2022-11-23 03:04:02,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:05,195 INFO L130 PetriNetUnfolder]: 17985/25241 cut-off events. [2022-11-23 03:04:05,195 INFO L131 PetriNetUnfolder]: For 1566/1566 co-relation queries the response was YES. [2022-11-23 03:04:05,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51000 conditions, 25241 events. 17985/25241 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143772 event pairs, 16169 based on Foata normal form. 1/10996 useless extension candidates. Maximal degree in co-relation 50995. Up to 17185 conditions per place. [2022-11-23 03:04:05,373 INFO L137 encePairwiseOnDemand]: 369/381 looper letters, 124 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2022-11-23 03:04:05,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 152 transitions, 673 flow [2022-11-23 03:04:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:04:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:04:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2022-11-23 03:04:05,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6509186351706037 [2022-11-23 03:04:05,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2022-11-23 03:04:05,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2022-11-23 03:04:05,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:05,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2022-11-23 03:04:05,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:05,381 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) [2022-11-23 03:04:05,382 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) [2022-11-23 03:04:05,382 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 744 transitions. [2022-11-23 03:04:05,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 152 transitions, 673 flow [2022-11-23 03:04:05,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 655 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:04:05,388 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 319 flow [2022-11-23 03:04:05,389 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} [2022-11-23 03:04:05,390 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-11-23 03:04:05,390 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 319 flow [2022-11-23 03:04:05,390 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) [2022-11-23 03:04:05,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:05,391 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 03:04:05,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:04:05,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash 19171924, now seen corresponding path program 1 times [2022-11-23 03:04:05,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:05,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080391897] [2022-11-23 03:04:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:05,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:05,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:05,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080391897] [2022-11-23 03:04:05,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080391897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:05,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:05,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:04:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022691615] [2022-11-23 03:04:05,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:05,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:04:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:04:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:04:06,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 381 [2022-11-23 03:04:06,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:06,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:06,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 381 [2022-11-23 03:04:06,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:07,740 INFO L130 PetriNetUnfolder]: 12756/18205 cut-off events. [2022-11-23 03:04:07,740 INFO L131 PetriNetUnfolder]: For 10314/10314 co-relation queries the response was YES. [2022-11-23 03:04:07,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40151 conditions, 18205 events. 12756/18205 cut-off events. For 10314/10314 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102546 event pairs, 12482 based on Foata normal form. 1469/8987 useless extension candidates. Maximal degree in co-relation 40145. Up to 17150 conditions per place. [2022-11-23 03:04:07,854 INFO L137 encePairwiseOnDemand]: 372/381 looper letters, 76 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2022-11-23 03:04:07,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 496 flow [2022-11-23 03:04:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:04:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:04:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 843 transitions. [2022-11-23 03:04:07,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5531496062992126 [2022-11-23 03:04:07,858 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 843 transitions. [2022-11-23 03:04:07,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 843 transitions. [2022-11-23 03:04:07,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:07,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 843 transitions. [2022-11-23 03:04:07,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:07,865 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) [2022-11-23 03:04:07,866 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) [2022-11-23 03:04:07,866 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 319 flow. Second operand 4 states and 843 transitions. [2022-11-23 03:04:07,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 496 flow [2022-11-23 03:04:07,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:04:07,879 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 309 flow [2022-11-23 03:04:07,879 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} [2022-11-23 03:04:07,880 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-11-23 03:04:07,880 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 309 flow [2022-11-23 03:04:07,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:07,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:07,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:04:07,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1598979376, now seen corresponding path program 1 times [2022-11-23 03:04:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172777411] [2022-11-23 03:04:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172777411] [2022-11-23 03:04:08,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172777411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:08,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:08,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:04:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039632726] [2022-11-23 03:04:08,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:08,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:04:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:04:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:04:08,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 381 [2022-11-23 03:04:08,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:08,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:08,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 381 [2022-11-23 03:04:08,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:09,914 INFO L130 PetriNetUnfolder]: 12751/18192 cut-off events. [2022-11-23 03:04:09,914 INFO L131 PetriNetUnfolder]: For 4476/4476 co-relation queries the response was YES. [2022-11-23 03:04:09,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38640 conditions, 18192 events. 12751/18192 cut-off events. For 4476/4476 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102616 event pairs, 12479 based on Foata normal form. 0/7515 useless extension candidates. Maximal degree in co-relation 38634. Up to 17118 conditions per place. [2022-11-23 03:04:10,019 INFO L137 encePairwiseOnDemand]: 377/381 looper letters, 72 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2022-11-23 03:04:10,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 94 transitions, 447 flow [2022-11-23 03:04:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:04:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:04:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-11-23 03:04:10,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5826771653543307 [2022-11-23 03:04:10,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-11-23 03:04:10,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-11-23 03:04:10,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:10,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-11-23 03:04:10,026 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) [2022-11-23 03:04:10,028 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) [2022-11-23 03:04:10,029 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) [2022-11-23 03:04:10,030 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 309 flow. Second operand 3 states and 666 transitions. [2022-11-23 03:04:10,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 94 transitions, 447 flow [2022-11-23 03:04:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:04:10,036 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 291 flow [2022-11-23 03:04:10,037 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2022-11-23 03:04:10,038 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-11-23 03:04:10,038 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 291 flow [2022-11-23 03:04:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:10,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:10,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:04:10,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1598979377, now seen corresponding path program 1 times [2022-11-23 03:04:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983071940] [2022-11-23 03:04:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:10,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:10,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983071940] [2022-11-23 03:04:10,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983071940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:10,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:10,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:04:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287758960] [2022-11-23 03:04:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:04:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:04:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:04:10,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-11-23 03:04:10,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 291 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) [2022-11-23 03:04:10,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:10,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-11-23 03:04:10,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:12,241 INFO L130 PetriNetUnfolder]: 12745/18177 cut-off events. [2022-11-23 03:04:12,241 INFO L131 PetriNetUnfolder]: For 4468/4468 co-relation queries the response was YES. [2022-11-23 03:04:12,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38594 conditions, 18177 events. 12745/18177 cut-off events. For 4468/4468 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102605 event pairs, 12471 based on Foata normal form. 0/7509 useless extension candidates. Maximal degree in co-relation 38588. Up to 17103 conditions per place. [2022-11-23 03:04:12,359 INFO L137 encePairwiseOnDemand]: 376/381 looper letters, 69 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2022-11-23 03:04:12,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 438 flow [2022-11-23 03:04:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:04:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:04:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 854 transitions. [2022-11-23 03:04:12,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5603674540682415 [2022-11-23 03:04:12,364 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 854 transitions. [2022-11-23 03:04:12,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 854 transitions. [2022-11-23 03:04:12,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:12,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 854 transitions. [2022-11-23 03:04:12,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:12,372 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) [2022-11-23 03:04:12,374 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) [2022-11-23 03:04:12,374 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 291 flow. Second operand 4 states and 854 transitions. [2022-11-23 03:04:12,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 438 flow [2022-11-23 03:04:12,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:04:12,384 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 285 flow [2022-11-23 03:04:12,385 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2022-11-23 03:04:12,388 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2022-11-23 03:04:12,389 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 285 flow [2022-11-23 03:04:12,389 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) [2022-11-23 03:04:12,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:12,390 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:12,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:04:12,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -499284073, now seen corresponding path program 1 times [2022-11-23 03:04:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:12,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831731842] [2022-11-23 03:04:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:12,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831731842] [2022-11-23 03:04:12,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831731842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:12,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:12,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:04:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002273293] [2022-11-23 03:04:12,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:12,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:04:12,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:04:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:04:13,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-11-23 03:04:13,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 285 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) [2022-11-23 03:04:13,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:13,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-11-23 03:04:13,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:14,344 INFO L130 PetriNetUnfolder]: 7622/11511 cut-off events. [2022-11-23 03:04:14,344 INFO L131 PetriNetUnfolder]: For 2923/2923 co-relation queries the response was YES. [2022-11-23 03:04:14,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24238 conditions, 11511 events. 7622/11511 cut-off events. For 2923/2923 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 66009 event pairs, 7349 based on Foata normal form. 0/5456 useless extension candidates. Maximal degree in co-relation 24232. Up to 10435 conditions per place. [2022-11-23 03:04:14,407 INFO L137 encePairwiseOnDemand]: 374/381 looper letters, 66 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2022-11-23 03:04:14,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 436 flow [2022-11-23 03:04:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:04:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:04:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 852 transitions. [2022-11-23 03:04:14,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5590551181102362 [2022-11-23 03:04:14,411 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 852 transitions. [2022-11-23 03:04:14,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 852 transitions. [2022-11-23 03:04:14,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:14,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 852 transitions. [2022-11-23 03:04:14,414 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) [2022-11-23 03:04:14,417 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) [2022-11-23 03:04:14,418 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) [2022-11-23 03:04:14,418 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 285 flow. Second operand 4 states and 852 transitions. [2022-11-23 03:04:14,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 436 flow [2022-11-23 03:04:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:04:14,424 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 279 flow [2022-11-23 03:04:14,424 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2022-11-23 03:04:14,425 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -14 predicate places. [2022-11-23 03:04:14,425 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 279 flow [2022-11-23 03:04:14,426 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) [2022-11-23 03:04:14,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:14,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:04:14,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1224355237, now seen corresponding path program 1 times [2022-11-23 03:04:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546901130] [2022-11-23 03:04:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:14,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:14,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546901130] [2022-11-23 03:04:14,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546901130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:14,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:14,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:04:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829090304] [2022-11-23 03:04:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:14,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:04:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:04:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:04:14,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 381 [2022-11-23 03:04:14,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 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) [2022-11-23 03:04:14,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:14,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 381 [2022-11-23 03:04:14,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:15,085 INFO L130 PetriNetUnfolder]: 2580/4204 cut-off events. [2022-11-23 03:04:15,086 INFO L131 PetriNetUnfolder]: For 1174/1174 co-relation queries the response was YES. [2022-11-23 03:04:15,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8877 conditions, 4204 events. 2580/4204 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21808 event pairs, 2442 based on Foata normal form. 0/2448 useless extension candidates. Maximal degree in co-relation 8871. Up to 3653 conditions per place. [2022-11-23 03:04:15,101 INFO L137 encePairwiseOnDemand]: 374/381 looper letters, 60 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-11-23 03:04:15,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 85 transitions, 407 flow [2022-11-23 03:04:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:04:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:04:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2022-11-23 03:04:15,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5599300087489064 [2022-11-23 03:04:15,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2022-11-23 03:04:15,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2022-11-23 03:04:15,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:15,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2022-11-23 03:04:15,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:15,110 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) [2022-11-23 03:04:15,110 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) [2022-11-23 03:04:15,111 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 279 flow. Second operand 3 states and 640 transitions. [2022-11-23 03:04:15,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 85 transitions, 407 flow [2022-11-23 03:04:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 397 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:04:15,114 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 269 flow [2022-11-23 03:04:15,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2022-11-23 03:04:15,115 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -19 predicate places. [2022-11-23 03:04:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 269 flow [2022-11-23 03:04:15,116 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) [2022-11-23 03:04:15,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:15,116 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:04:15,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1224355236, now seen corresponding path program 1 times [2022-11-23 03:04:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687775217] [2022-11-23 03:04:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687775217] [2022-11-23 03:04:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687775217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:15,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:15,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:04:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265352519] [2022-11-23 03:04:15,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:04:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:04:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:04:15,346 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 381 [2022-11-23 03:04:15,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 269 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) [2022-11-23 03:04:15,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:15,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 381 [2022-11-23 03:04:15,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:15,548 INFO L130 PetriNetUnfolder]: 576/1132 cut-off events. [2022-11-23 03:04:15,548 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2022-11-23 03:04:15,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 1132 events. 576/1132 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4807 event pairs, 513 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 2452. Up to 926 conditions per place. [2022-11-23 03:04:15,553 INFO L137 encePairwiseOnDemand]: 375/381 looper letters, 63 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-11-23 03:04:15,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 397 flow [2022-11-23 03:04:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:04:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:04:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2022-11-23 03:04:15,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5853018372703412 [2022-11-23 03:04:15,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2022-11-23 03:04:15,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2022-11-23 03:04:15,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:15,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2022-11-23 03:04:15,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:15,561 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) [2022-11-23 03:04:15,562 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) [2022-11-23 03:04:15,562 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 269 flow. Second operand 3 states and 669 transitions. [2022-11-23 03:04:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 397 flow [2022-11-23 03:04:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:04:15,565 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 255 flow [2022-11-23 03:04:15,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2022-11-23 03:04:15,566 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -24 predicate places. [2022-11-23 03:04:15,566 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 255 flow [2022-11-23 03:04:15,567 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) [2022-11-23 03:04:15,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:15,567 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 03:04:15,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:15,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1224355287, now seen corresponding path program 1 times [2022-11-23 03:04:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:15,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081602653] [2022-11-23 03:04:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081602653] [2022-11-23 03:04:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081602653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:15,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:15,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:04:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120210511] [2022-11-23 03:04:15,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:15,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:04:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:04:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:04:16,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-11-23 03:04:16,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 255 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) [2022-11-23 03:04:16,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:16,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-11-23 03:04:16,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:16,418 INFO L130 PetriNetUnfolder]: 610/1106 cut-off events. [2022-11-23 03:04:16,418 INFO L131 PetriNetUnfolder]: For 390/390 co-relation queries the response was YES. [2022-11-23 03:04:16,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 1106 events. 610/1106 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4213 event pairs, 548 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 2468. Up to 944 conditions per place. [2022-11-23 03:04:16,425 INFO L137 encePairwiseOnDemand]: 374/381 looper letters, 56 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-11-23 03:04:16,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 386 flow [2022-11-23 03:04:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:04:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:04:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 842 transitions. [2022-11-23 03:04:16,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.55249343832021 [2022-11-23 03:04:16,429 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 842 transitions. [2022-11-23 03:04:16,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 842 transitions. [2022-11-23 03:04:16,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:16,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 842 transitions. [2022-11-23 03:04:16,432 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) [2022-11-23 03:04:16,435 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) [2022-11-23 03:04:16,435 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) [2022-11-23 03:04:16,436 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 255 flow. Second operand 4 states and 842 transitions. [2022-11-23 03:04:16,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 386 flow [2022-11-23 03:04:16,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:04:16,439 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 255 flow [2022-11-23 03:04:16,439 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2022-11-23 03:04:16,440 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2022-11-23 03:04:16,440 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 255 flow [2022-11-23 03:04:16,441 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) [2022-11-23 03:04:16,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:16,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 03:04:16,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -215594976, now seen corresponding path program 1 times [2022-11-23 03:04:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:16,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168125673] [2022-11-23 03:04:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:16,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:16,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168125673] [2022-11-23 03:04:16,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168125673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:16,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:16,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:04:16,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135081463] [2022-11-23 03:04:16,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:16,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:04:16,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:16,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:04:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:04:17,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-11-23 03:04:17,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 255 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) [2022-11-23 03:04:17,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:17,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-11-23 03:04:17,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:17,411 INFO L130 PetriNetUnfolder]: 550/998 cut-off events. [2022-11-23 03:04:17,412 INFO L131 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2022-11-23 03:04:17,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 998 events. 550/998 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3698 event pairs, 489 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2251. Up to 847 conditions per place. [2022-11-23 03:04:17,417 INFO L137 encePairwiseOnDemand]: 374/381 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-11-23 03:04:17,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 382 flow [2022-11-23 03:04:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:04:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:04:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2022-11-23 03:04:17,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5511811023622047 [2022-11-23 03:04:17,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2022-11-23 03:04:17,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2022-11-23 03:04:17,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:17,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2022-11-23 03:04:17,425 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) [2022-11-23 03:04:17,428 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) [2022-11-23 03:04:17,429 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) [2022-11-23 03:04:17,430 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 255 flow. Second operand 4 states and 840 transitions. [2022-11-23 03:04:17,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 382 flow [2022-11-23 03:04:17,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 372 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:04:17,433 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 247 flow [2022-11-23 03:04:17,434 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2022-11-23 03:04:17,434 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2022-11-23 03:04:17,434 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 247 flow [2022-11-23 03:04:17,435 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) [2022-11-23 03:04:17,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:17,435 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] [2022-11-23 03:04:17,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 03:04:17,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:17,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1028328350, now seen corresponding path program 1 times [2022-11-23 03:04:17,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:17,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470086790] [2022-11-23 03:04:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:17,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:17,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:17,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470086790] [2022-11-23 03:04:17,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470086790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:17,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:17,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:04:17,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926847295] [2022-11-23 03:04:17,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:17,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:04:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:04:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:04:17,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 381 [2022-11-23 03:04:17,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 247 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) [2022-11-23 03:04:17,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:17,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 381 [2022-11-23 03:04:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:18,028 INFO L130 PetriNetUnfolder]: 495/913 cut-off events. [2022-11-23 03:04:18,028 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2022-11-23 03:04:18,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 913 events. 495/913 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3301 event pairs, 435 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 2058. Up to 758 conditions per place. [2022-11-23 03:04:18,031 INFO L137 encePairwiseOnDemand]: 377/381 looper letters, 51 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2022-11-23 03:04:18,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 357 flow [2022-11-23 03:04:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:04:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:04:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2022-11-23 03:04:18,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5651793525809273 [2022-11-23 03:04:18,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2022-11-23 03:04:18,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2022-11-23 03:04:18,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:18,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2022-11-23 03:04:18,039 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) [2022-11-23 03:04:18,041 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) [2022-11-23 03:04:18,042 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) [2022-11-23 03:04:18,042 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 247 flow. Second operand 3 states and 646 transitions. [2022-11-23 03:04:18,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 357 flow [2022-11-23 03:04:18,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 347 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:04:18,046 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 239 flow [2022-11-23 03:04:18,046 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} [2022-11-23 03:04:18,047 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -33 predicate places. [2022-11-23 03:04:18,047 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 239 flow [2022-11-23 03:04:18,047 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) [2022-11-23 03:04:18,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:18,048 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] [2022-11-23 03:04:18,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 03:04:18,048 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1028328351, now seen corresponding path program 1 times [2022-11-23 03:04:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:18,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700201302] [2022-11-23 03:04:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:18,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700201302] [2022-11-23 03:04:18,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700201302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:18,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:18,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:04:18,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438251518] [2022-11-23 03:04:18,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:18,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:04:18,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:04:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:04:18,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 381 [2022-11-23 03:04:18,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 239 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) [2022-11-23 03:04:18,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:18,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 381 [2022-11-23 03:04:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:18,779 INFO L130 PetriNetUnfolder]: 451/839 cut-off events. [2022-11-23 03:04:18,780 INFO L131 PetriNetUnfolder]: For 311/311 co-relation queries the response was YES. [2022-11-23 03:04:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 839 events. 451/839 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2941 event pairs, 390 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 1895. Up to 690 conditions per place. [2022-11-23 03:04:18,784 INFO L137 encePairwiseOnDemand]: 376/381 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2022-11-23 03:04:18,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 362 flow [2022-11-23 03:04:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:04:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:04:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 835 transitions. [2022-11-23 03:04:18,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5479002624671916 [2022-11-23 03:04:18,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 835 transitions. [2022-11-23 03:04:18,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 835 transitions. [2022-11-23 03:04:18,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:18,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 835 transitions. [2022-11-23 03:04:18,793 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) [2022-11-23 03:04:18,796 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) [2022-11-23 03:04:18,797 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) [2022-11-23 03:04:18,798 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 239 flow. Second operand 4 states and 835 transitions. [2022-11-23 03:04:18,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 362 flow [2022-11-23 03:04:18,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:04:18,801 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 239 flow [2022-11-23 03:04:18,801 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} [2022-11-23 03:04:18,802 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2022-11-23 03:04:18,802 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 239 flow [2022-11-23 03:04:18,803 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) [2022-11-23 03:04:18,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:18,804 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] [2022-11-23 03:04:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 03:04:18,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:18,805 INFO L85 PathProgramCache]: Analyzing trace with hash 46538596, now seen corresponding path program 1 times [2022-11-23 03:04:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000148524] [2022-11-23 03:04:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:18,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:20,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:20,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000148524] [2022-11-23 03:04:20,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000148524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:20,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:20,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:04:20,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117451970] [2022-11-23 03:04:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:04:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:04:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:04:22,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 381 [2022-11-23 03:04:22,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 239 flow. Second operand has 15 states, 15 states have (on average 174.13333333333333) internal successors, (2612), 15 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:22,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:22,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 381 [2022-11-23 03:04:22,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:23,411 INFO L130 PetriNetUnfolder]: 494/881 cut-off events. [2022-11-23 03:04:23,411 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-11-23 03:04:23,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2037 conditions, 881 events. 494/881 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2978 event pairs, 431 based on Foata normal form. 1/830 useless extension candidates. Maximal degree in co-relation 2031. Up to 750 conditions per place. [2022-11-23 03:04:23,414 INFO L137 encePairwiseOnDemand]: 370/381 looper letters, 53 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2022-11-23 03:04:23,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 399 flow [2022-11-23 03:04:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:04:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:04:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1263 transitions. [2022-11-23 03:04:23,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4735658042744657 [2022-11-23 03:04:23,420 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1263 transitions. [2022-11-23 03:04:23,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1263 transitions. [2022-11-23 03:04:23,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:23,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1263 transitions. [2022-11-23 03:04:23,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.42857142857142) internal successors, (1263), 7 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:23,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:23,432 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:23,432 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 239 flow. Second operand 7 states and 1263 transitions. [2022-11-23 03:04:23,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 399 flow [2022-11-23 03:04:23,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:04:23,435 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 278 flow [2022-11-23 03:04:23,436 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=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2022-11-23 03:04:23,436 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2022-11-23 03:04:23,437 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 278 flow [2022-11-23 03:04:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 174.13333333333333) internal successors, (2612), 15 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:23,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:23,438 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] [2022-11-23 03:04:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 03:04:23,439 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1442694217, now seen corresponding path program 1 times [2022-11-23 03:04:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:23,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249139355] [2022-11-23 03:04:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:24,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:24,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249139355] [2022-11-23 03:04:24,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249139355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:24,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:24,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:04:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075780882] [2022-11-23 03:04:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:24,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:04:24,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:04:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:04:26,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 381 [2022-11-23 03:04:26,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 278 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) [2022-11-23 03:04:26,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:26,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 381 [2022-11-23 03:04:26,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:26,390 INFO L130 PetriNetUnfolder]: 444/830 cut-off events. [2022-11-23 03:04:26,390 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2022-11-23 03:04:26,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 830 events. 444/830 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2920 event pairs, 381 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 1903. Up to 671 conditions per place. [2022-11-23 03:04:26,393 INFO L137 encePairwiseOnDemand]: 367/381 looper letters, 48 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2022-11-23 03:04:26,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 463 flow [2022-11-23 03:04:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:04:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:04:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1952 transitions. [2022-11-23 03:04:26,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4657599618229539 [2022-11-23 03:04:26,400 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1952 transitions. [2022-11-23 03:04:26,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1952 transitions. [2022-11-23 03:04:26,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:26,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1952 transitions. [2022-11-23 03:04:26,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.45454545454547) internal successors, (1952), 11 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:26,414 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) [2022-11-23 03:04:26,416 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) [2022-11-23 03:04:26,416 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 278 flow. Second operand 11 states and 1952 transitions. [2022-11-23 03:04:26,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 463 flow [2022-11-23 03:04:26,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 450 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:04:26,420 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 330 flow [2022-11-23 03:04:26,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2022-11-23 03:04:26,421 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -21 predicate places. [2022-11-23 03:04:26,421 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 330 flow [2022-11-23 03:04:26,422 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) [2022-11-23 03:04:26,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:26,423 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] [2022-11-23 03:04:26,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 03:04:26,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1773845787, now seen corresponding path program 1 times [2022-11-23 03:04:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:26,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899727686] [2022-11-23 03:04:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:26,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899727686] [2022-11-23 03:04:27,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899727686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:27,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:04:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25501773] [2022-11-23 03:04:27,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:04:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:04:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:04:28,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 381 [2022-11-23 03:04:28,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 330 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) [2022-11-23 03:04:28,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:28,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 381 [2022-11-23 03:04:28,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:29,146 INFO L130 PetriNetUnfolder]: 443/828 cut-off events. [2022-11-23 03:04:29,147 INFO L131 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2022-11-23 03:04:29,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 828 events. 443/828 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2916 event pairs, 380 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 1930. Up to 671 conditions per place. [2022-11-23 03:04:29,150 INFO L137 encePairwiseOnDemand]: 367/381 looper letters, 48 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2022-11-23 03:04:29,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 520 flow [2022-11-23 03:04:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:04:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:04:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2124 transitions. [2022-11-23 03:04:29,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4645669291338583 [2022-11-23 03:04:29,156 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2124 transitions. [2022-11-23 03:04:29,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2124 transitions. [2022-11-23 03:04:29,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:29,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2124 transitions. [2022-11-23 03:04:29,162 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) [2022-11-23 03:04:29,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:29,169 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:29,169 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 330 flow. Second operand 12 states and 2124 transitions. [2022-11-23 03:04:29,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 520 flow [2022-11-23 03:04:29,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 491 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-23 03:04:29,174 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 370 flow [2022-11-23 03:04:29,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=370, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2022-11-23 03:04:29,175 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -16 predicate places. [2022-11-23 03:04:29,175 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 370 flow [2022-11-23 03:04:29,176 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) [2022-11-23 03:04:29,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:29,176 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] [2022-11-23 03:04:29,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 03:04:29,177 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash -845356718, now seen corresponding path program 1 times [2022-11-23 03:04:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:29,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797096382] [2022-11-23 03:04:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:30,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797096382] [2022-11-23 03:04:30,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797096382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:30,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:30,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:04:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886059441] [2022-11-23 03:04:30,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:30,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:04:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:04:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:04:31,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 381 [2022-11-23 03:04:31,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 370 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) [2022-11-23 03:04:31,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:31,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 381 [2022-11-23 03:04:31,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:31,519 INFO L130 PetriNetUnfolder]: 442/826 cut-off events. [2022-11-23 03:04:31,520 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-23 03:04:31,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1954 conditions, 826 events. 442/826 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2905 event pairs, 379 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 1943. Up to 671 conditions per place. [2022-11-23 03:04:31,524 INFO L137 encePairwiseOnDemand]: 367/381 looper letters, 48 selfloop transitions, 22 changer transitions 0/79 dead transitions. [2022-11-23 03:04:31,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 79 transitions, 565 flow [2022-11-23 03:04:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:04:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:04:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2296 transitions. [2022-11-23 03:04:31,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46355743993539267 [2022-11-23 03:04:31,531 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2296 transitions. [2022-11-23 03:04:31,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2296 transitions. [2022-11-23 03:04:31,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:31,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2296 transitions. [2022-11-23 03:04:31,537 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) [2022-11-23 03:04:31,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 381.0) internal successors, (5334), 14 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:31,545 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 381.0) internal successors, (5334), 14 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:31,545 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 370 flow. Second operand 13 states and 2296 transitions. [2022-11-23 03:04:31,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 79 transitions, 565 flow [2022-11-23 03:04:31,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 532 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-23 03:04:31,550 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 410 flow [2022-11-23 03:04:31,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=410, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2022-11-23 03:04:31,551 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -11 predicate places. [2022-11-23 03:04:31,551 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 410 flow [2022-11-23 03:04:31,552 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) [2022-11-23 03:04:31,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:31,553 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] [2022-11-23 03:04:31,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 03:04:31,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash -436253858, now seen corresponding path program 1 times [2022-11-23 03:04:31,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:31,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895068905] [2022-11-23 03:04:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:31,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:04:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895068905] [2022-11-23 03:04:32,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895068905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:32,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:32,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:04:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468312313] [2022-11-23 03:04:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:32,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:04:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:04:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:04:33,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 381 [2022-11-23 03:04:33,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 410 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) [2022-11-23 03:04:33,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:33,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 381 [2022-11-23 03:04:33,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:34,197 INFO L130 PetriNetUnfolder]: 442/825 cut-off events. [2022-11-23 03:04:34,197 INFO L131 PetriNetUnfolder]: For 434/434 co-relation queries the response was YES. [2022-11-23 03:04:34,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 825 events. 442/825 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2901 event pairs, 379 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 1954. Up to 671 conditions per place. [2022-11-23 03:04:34,200 INFO L137 encePairwiseOnDemand]: 368/381 looper letters, 43 selfloop transitions, 23 changer transitions 0/75 dead transitions. [2022-11-23 03:04:34,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 75 transitions, 562 flow [2022-11-23 03:04:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:04:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:04:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2118 transitions. [2022-11-23 03:04:34,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.463254593175853 [2022-11-23 03:04:34,208 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2118 transitions. [2022-11-23 03:04:34,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2118 transitions. [2022-11-23 03:04:34,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:04:34,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2118 transitions. [2022-11-23 03:04:34,215 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) [2022-11-23 03:04:34,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:34,224 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 381.0) internal successors, (4953), 13 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:04:34,224 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 410 flow. Second operand 12 states and 2118 transitions. [2022-11-23 03:04:34,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 75 transitions, 562 flow [2022-11-23 03:04:34,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 509 flow, removed 0 selfloop flow, removed 14 redundant places. [2022-11-23 03:04:34,229 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 391 flow [2022-11-23 03:04:34,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=391, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2022-11-23 03:04:34,230 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -15 predicate places. [2022-11-23 03:04:34,231 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 391 flow [2022-11-23 03:04:34,232 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) [2022-11-23 03:04:34,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:34,232 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] [2022-11-23 03:04:34,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 03:04:34,233 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1146766765, now seen corresponding path program 1 times [2022-11-23 03:04:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:04:34,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098471009] [2022-11-23 03:04:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:04:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:04:34,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:04:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:04:34,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:04:34,437 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:04:34,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (70 of 71 remaining) [2022-11-23 03:04:34,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 71 remaining) [2022-11-23 03:04:34,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 71 remaining) [2022-11-23 03:04:34,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 71 remaining) [2022-11-23 03:04:34,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 71 remaining) [2022-11-23 03:04:34,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 71 remaining) [2022-11-23 03:04:34,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 71 remaining) [2022-11-23 03:04:34,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 71 remaining) [2022-11-23 03:04:34,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 71 remaining) [2022-11-23 03:04:34,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 71 remaining) [2022-11-23 03:04:34,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 71 remaining) [2022-11-23 03:04:34,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 71 remaining) [2022-11-23 03:04:34,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 71 remaining) [2022-11-23 03:04:34,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 71 remaining) [2022-11-23 03:04:34,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 71 remaining) [2022-11-23 03:04:34,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 71 remaining) [2022-11-23 03:04:34,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 71 remaining) [2022-11-23 03:04:34,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 71 remaining) [2022-11-23 03:04:34,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 71 remaining) [2022-11-23 03:04:34,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 71 remaining) [2022-11-23 03:04:34,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 71 remaining) [2022-11-23 03:04:34,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 71 remaining) [2022-11-23 03:04:34,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 71 remaining) [2022-11-23 03:04:34,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 71 remaining) [2022-11-23 03:04:34,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 71 remaining) [2022-11-23 03:04:34,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 71 remaining) [2022-11-23 03:04:34,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 71 remaining) [2022-11-23 03:04:34,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 71 remaining) [2022-11-23 03:04:34,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 71 remaining) [2022-11-23 03:04:34,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 71 remaining) [2022-11-23 03:04:34,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 71 remaining) [2022-11-23 03:04:34,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 71 remaining) [2022-11-23 03:04:34,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 71 remaining) [2022-11-23 03:04:34,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 71 remaining) [2022-11-23 03:04:34,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 71 remaining) [2022-11-23 03:04:34,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 71 remaining) [2022-11-23 03:04:34,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (34 of 71 remaining) [2022-11-23 03:04:34,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 71 remaining) [2022-11-23 03:04:34,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 71 remaining) [2022-11-23 03:04:34,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 71 remaining) [2022-11-23 03:04:34,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 71 remaining) [2022-11-23 03:04:34,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 71 remaining) [2022-11-23 03:04:34,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 71 remaining) [2022-11-23 03:04:34,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 71 remaining) [2022-11-23 03:04:34,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 71 remaining) [2022-11-23 03:04:34,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 71 remaining) [2022-11-23 03:04:34,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 71 remaining) [2022-11-23 03:04:34,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 71 remaining) [2022-11-23 03:04:34,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 71 remaining) [2022-11-23 03:04:34,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 71 remaining) [2022-11-23 03:04:34,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 71 remaining) [2022-11-23 03:04:34,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 71 remaining) [2022-11-23 03:04:34,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 71 remaining) [2022-11-23 03:04:34,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 71 remaining) [2022-11-23 03:04:34,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 71 remaining) [2022-11-23 03:04:34,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 71 remaining) [2022-11-23 03:04:34,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 71 remaining) [2022-11-23 03:04:34,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 71 remaining) [2022-11-23 03:04:34,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 71 remaining) [2022-11-23 03:04:34,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 71 remaining) [2022-11-23 03:04:34,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 71 remaining) [2022-11-23 03:04:34,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 71 remaining) [2022-11-23 03:04:34,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 71 remaining) [2022-11-23 03:04:34,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 71 remaining) [2022-11-23 03:04:34,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 71 remaining) [2022-11-23 03:04:34,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 71 remaining) [2022-11-23 03:04:34,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 71 remaining) [2022-11-23 03:04:34,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 71 remaining) [2022-11-23 03:04:34,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 71 remaining) [2022-11-23 03:04:34,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 71 remaining) [2022-11-23 03:04:34,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 71 remaining) [2022-11-23 03:04:34,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 03:04:34,461 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:04:34,472 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 03:04:34,473 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 03:04:34,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:04:34 BasicIcfg [2022-11-23 03:04:34,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 03:04:34,598 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 03:04:34,598 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 03:04:34,598 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 03:04:34,599 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:49" (3/4) ... [2022-11-23 03:04:34,602 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 03:04:34,602 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 03:04:34,603 INFO L158 Benchmark]: Toolchain (without parser) took 47296.85ms. Allocated memory was 188.7MB in the beginning and 8.3GB in the end (delta: 8.1GB). Free memory was 144.8MB in the beginning and 4.7GB in the end (delta: -4.6GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. [2022-11-23 03:04:34,603 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 80.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:04:34,604 INFO L158 Benchmark]: CACSL2BoogieTranslator took 866.38ms. Allocated memory is still 188.7MB. Free memory was 144.8MB in the beginning and 111.3MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-23 03:04:34,604 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.16ms. Allocated memory is still 188.7MB. Free memory was 111.3MB in the beginning and 109.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:04:34,604 INFO L158 Benchmark]: Boogie Preprocessor took 70.23ms. Allocated memory is still 188.7MB. Free memory was 109.1MB in the beginning and 107.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:04:34,605 INFO L158 Benchmark]: RCFGBuilder took 719.57ms. Allocated memory is still 188.7MB. Free memory was 107.1MB in the beginning and 88.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-23 03:04:34,605 INFO L158 Benchmark]: TraceAbstraction took 45562.98ms. Allocated memory was 188.7MB in the beginning and 8.3GB in the end (delta: 8.1GB). Free memory was 86.9MB in the beginning and 4.7GB in the end (delta: -4.7GB). Peak memory consumption was 3.4GB. Max. memory is 16.1GB. [2022-11-23 03:04:34,606 INFO L158 Benchmark]: Witness Printer took 4.54ms. Allocated memory is still 8.3GB. Free memory is still 4.7GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:04:34,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 80.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 866.38ms. Allocated memory is still 188.7MB. Free memory was 144.8MB in the beginning and 111.3MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.16ms. Allocated memory is still 188.7MB. Free memory was 111.3MB in the beginning and 109.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.23ms. Allocated memory is still 188.7MB. Free memory was 109.1MB in the beginning and 107.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 719.57ms. Allocated memory is still 188.7MB. Free memory was 107.1MB in the beginning and 88.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 45562.98ms. Allocated memory was 188.7MB in the beginning and 8.3GB in the end (delta: 8.1GB). Free memory was 86.9MB in the beginning and 4.7GB in the end (delta: -4.7GB). Peak memory consumption was 3.4GB. Max. memory is 16.1GB. * Witness Printer took 4.54ms. Allocated memory is still 8.3GB. Free memory is still 4.7GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 177 PlacesBefore, 99 PlacesAfterwards, 164 TransitionsBefore, 85 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 44 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 131 TotalNumberOfCompositions, 6827 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4770, independent: 4538, independent conditional: 0, independent unconditional: 4538, dependent: 232, dependent conditional: 0, dependent unconditional: 232, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1651, independent: 1569, independent conditional: 0, independent unconditional: 1569, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1651, independent: 1552, independent conditional: 0, independent unconditional: 1552, dependent: 99, dependent conditional: 0, dependent unconditional: 99, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 99, independent: 17, independent conditional: 0, independent unconditional: 17, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 360, independent: 53, independent conditional: 0, independent unconditional: 53, dependent: 307, dependent conditional: 0, dependent unconditional: 307, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4770, independent: 2969, independent conditional: 0, independent unconditional: 2969, dependent: 150, dependent conditional: 0, dependent unconditional: 150, unknown: 1651, unknown conditional: 0, unknown unconditional: 1651] , Statistics on independence cache: Total cache size (in pairs): 265, Positive cache size: 229, Positive conditional cache size: 0, Positive unconditional cache size: 229, Negative cache size: 36, Negative conditional cache size: 0, Negative unconditional cache size: 36, 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 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [#in~arg={0:0}, pthread_create(&t, 0, thread0, 0)=-2, 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 [#in~arg={0:0}, #in~arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=-1, t1={9:0}, t2={10:0}, t3={11:0}, t4={13:0}, t5={7:0}, v={0:0}] [L1148] 1 \read(t1) VAL [#in~arg={0:0}, #in~arg={0:0}, \read(t1)=-1, 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 [#in~arg={0:0}, #in~arg={0:0}, \read(t)=-2, \read(t1)=-1, \result={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 [#in~arg={0:0}, #in~arg={0:0}, \read(t1)=-1, \result={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 [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=0, 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 [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=1, 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 [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=2, 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 [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=3, 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 [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t2)=0, \result={0:0}, \result={0:0}, \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}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t2)=0, \result={0:0}, \result={0:0}, \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}] [L1154] 1 \read(t3) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t3)=1, \result={0:0}, \result={0:0}, \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}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t3)=1, \result={0:0}, \result={0:0}, \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}] [L1155] 1 \read(t4) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t4)=2, \result={0:0}, \result={0:0}, \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}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t4)=2, \result={0:0}, \result={0:0}, \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}] [L1156] 1 \read(t5) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t5)=3, \result={0:0}, \result={0:0}, \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}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t5)=3, \result={0:0}, \result={0:0}, \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}] [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 [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t)=-2, \result={0:0}, \result={0:0}, \result={0:0}, \result={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: 45.1s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 31.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9624 SdHoareTripleChecker+Valid, 13.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6988 mSDsluCounter, 1648 SdHoareTripleChecker+Invalid, 11.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1446 mSDsCounter, 667 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14544 IncrementalHoareTripleChecker+Invalid, 15211 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 667 mSolverCounterUnsat, 202 mSDtfsCounter, 14544 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=410occurred in iteration=17, InterpolantAutomatonStates: 99, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 397 NumberOfCodeBlocks, 397 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 334 ConstructedInterpolants, 0 QuantifiedInterpolants, 5931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 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 [2022-11-23 03:04:34,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS --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-4e7fbc6 [2022-11-23 03:04:37,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:04:37,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:04:37,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:04:37,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:04:37,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:04:37,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:04:37,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:04:37,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:04:37,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:04:37,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:04:37,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:04:37,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:04:37,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:04:37,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:04:37,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:04:37,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:04:37,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:04:37,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:04:37,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:04:37,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:04:37,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:04:37,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:04:37,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:04:37,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:04:37,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:04:37,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:04:37,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:04:37,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:04:37,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:04:37,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:04:37,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:04:37,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:04:37,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:04:37,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:04:37,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:04:37,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:04:37,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:04:37,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:04:37,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:04:37,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:04:37,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 03:04:37,584 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:04:37,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:04:37,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:04:37,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:04:37,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:04:37,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:04:37,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:04:37,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:04:37,587 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:04:37,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:04:37,588 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:04:37,588 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:04:37,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:04:37,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:04:37,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:04:37,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:04:37,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:04:37,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:04:37,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:04:37,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:04:37,590 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 03:04:37,590 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 03:04:37,590 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:04:37,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:04:37,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:04:37,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:04:37,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:04:37,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:04:37,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:04:37,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:04:37,592 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 03:04:37,592 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 03:04:37,592 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:04:37,592 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:04:37,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:04:37,593 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 03:04:37,593 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0ecaab9c4a4889914d1343f60808acf6ec66df89812b70cea6837a39471f7f [2022-11-23 03:04:37,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:04:38,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:04:38,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:04:38,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:04:38,021 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:04:38,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/singleton.i [2022-11-23 03:04:41,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:04:41,828 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:04:41,832 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/sv-benchmarks/c/pthread/singleton.i [2022-11-23 03:04:41,864 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data/339b50025/a92931bc03884d9c910b5ca1d37c2d3b/FLAGd79077e29 [2022-11-23 03:04:41,883 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/data/339b50025/a92931bc03884d9c910b5ca1d37c2d3b [2022-11-23 03:04:41,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:04:41,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:04:41,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:04:41,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:04:41,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:04:41,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:41" (1/1) ... [2022-11-23 03:04:41,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13213053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:41, skipping insertion in model container [2022-11-23 03:04:41,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:41" (1/1) ... [2022-11-23 03:04:41,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:04:41,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:04:42,179 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 03:04:42,622 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-11-23 03:04:42,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:04:42,690 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:04:42,726 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 03:04:42,762 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_dcd6279f-0843-4468-9b75-7d2d15aac7f5/sv-benchmarks/c/pthread/singleton.i[55547,55560] [2022-11-23 03:04:42,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:04:42,856 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:04:42,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42 WrapperNode [2022-11-23 03:04:42,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:04:42,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:04:42,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:04:42,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:04:42,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,925 INFO L138 Inliner]: procedures = 328, calls = 52, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2022-11-23 03:04:42,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:04:42,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:04:42,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:04:42,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:04:42,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:04:42,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:04:42,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:04:42,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:04:42,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (1/1) ... [2022-11-23 03:04:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:04:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:04:43,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:04:43,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:04:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-23 03:04:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 03:04:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:04:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:04:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-23 03:04:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:04:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 03:04:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 03:04:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:04:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-11-23 03:04:43,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-11-23 03:04:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:04:43,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:04:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:04:43,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:04:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 03:04:43,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 03:04:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:04:43,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:04:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:04:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:04:43,079 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:04:43,374 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:04:43,376 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:04:43,942 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:04:43,958 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:04:43,960 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 03:04:43,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:43 BoogieIcfgContainer [2022-11-23 03:04:43,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:04:43,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:04:43,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:04:43,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:04:43,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:04:41" (1/3) ... [2022-11-23 03:04:43,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cef1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:43, skipping insertion in model container [2022-11-23 03:04:43,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:42" (2/3) ... [2022-11-23 03:04:43,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cef1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:43, skipping insertion in model container [2022-11-23 03:04:43,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:43" (3/3) ... [2022-11-23 03:04:43,982 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton.i [2022-11-23 03:04:44,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:04:44,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-23 03:04:44,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:04:44,259 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-11-23 03:04:44,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 249 transitions, 605 flow [2022-11-23 03:04:44,376 INFO L130 PetriNetUnfolder]: 6/170 cut-off events. [2022-11-23 03:04:44,376 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 03:04:44,383 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 163 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. [2022-11-23 03:04:44,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 249 transitions, 605 flow [2022-11-23 03:04:44,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 165 transitions, 381 flow [2022-11-23 03:04:44,394 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:04:44,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 165 transitions, 381 flow [2022-11-23 03:04:44,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 165 transitions, 381 flow [2022-11-23 03:04:44,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 165 transitions, 381 flow [2022-11-23 03:04:44,459 INFO L130 PetriNetUnfolder]: 6/165 cut-off events. [2022-11-23 03:04:44,459 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 03:04:44,460 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 164 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. [2022-11-23 03:04:44,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2022-11-23 03:04:58,743 INFO L134 LiptonReduction]: Checked pairs total: 6667 [2022-11-23 03:04:58,743 INFO L136 LiptonReduction]: Total number of compositions: 131 [2022-11-23 03:04:58,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:04:58,769 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;@678b3abf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:04:58,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-23 03:04:58,771 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-23 03:04:58,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:04:58,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:04:58,772 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 03:04:58,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:04:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:04:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash 630, now seen corresponding path program 1 times [2022-11-23 03:04:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:04:58,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749261217] [2022-11-23 03:04:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:04:58,794 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 [2022-11-23 03:04:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:04:58,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:04:58,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:04:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:04:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 03:04:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:04:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:04:58,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:04:58,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:04:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749261217] [2022-11-23 03:04:58,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749261217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:04:58,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:04:58,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 03:04:58,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242077975] [2022-11-23 03:04:58,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:04:58,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:04:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:04:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:04:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:04:58,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 382 [2022-11-23 03:04:58,987 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) [2022-11-23 03:04:58,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:58,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 382 [2022-11-23 03:04:58,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:03,109 INFO L130 PetriNetUnfolder]: 19442/26675 cut-off events. [2022-11-23 03:05:03,110 INFO L131 PetriNetUnfolder]: For 561/561 co-relation queries the response was YES. [2022-11-23 03:05:03,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53378 conditions, 26675 events. 19442/26675 cut-off events. For 561/561 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145293 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. [2022-11-23 03:05:03,371 INFO L137 encePairwiseOnDemand]: 380/382 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-11-23 03:05:03,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2022-11-23 03:05:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:05:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 03:05:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-11-23 03:05:03,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6583769633507853 [2022-11-23 03:05:03,397 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-11-23 03:05:03,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-11-23 03:05:03,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:03,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-11-23 03:05:03,413 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) [2022-11-23 03:05:03,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:03,425 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:03,428 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 221 flow. Second operand 2 states and 503 transitions. [2022-11-23 03:05:03,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2022-11-23 03:05:03,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-23 03:05:03,480 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2022-11-23 03:05:03,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, 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} [2022-11-23 03:05:03,487 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-11-23 03:05:03,487 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2022-11-23 03:05:03,488 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) [2022-11-23 03:05:03,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:03,493 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:05:03,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Ended with exit code 0 [2022-11-23 03:05:03,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:03,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 617647, now seen corresponding path program 1 times [2022-11-23 03:05:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:03,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258022246] [2022-11-23 03:05:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:03,709 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 [2022-11-23 03:05:03,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:03,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:03,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:03,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:05:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:03,909 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 [2022-11-23 03:05:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:03,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:03,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:03,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258022246] [2022-11-23 03:05:03,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258022246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:03,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:03,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:05:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727476762] [2022-11-23 03:05:03,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:04,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 382 [2022-11-23 03:05:04,246 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) [2022-11-23 03:05:04,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:04,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 382 [2022-11-23 03:05:04,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:06,620 INFO L130 PetriNetUnfolder]: 14221/19662 cut-off events. [2022-11-23 03:05:06,620 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-23 03:05:06,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38569 conditions, 19662 events. 14221/19662 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104110 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. [2022-11-23 03:05:06,735 INFO L137 encePairwiseOnDemand]: 373/382 looper letters, 69 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2022-11-23 03:05:06,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 360 flow [2022-11-23 03:05:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2022-11-23 03:05:06,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5916230366492147 [2022-11-23 03:05:06,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2022-11-23 03:05:06,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2022-11-23 03:05:06,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:06,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2022-11-23 03:05:06,741 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) [2022-11-23 03:05:06,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:06,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:06,746 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 678 transitions. [2022-11-23 03:05:06,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 360 flow [2022-11-23 03:05:06,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:05:06,751 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2022-11-23 03:05:06,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, 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} [2022-11-23 03:05:06,753 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-11-23 03:05:06,753 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2022-11-23 03:05:06,753 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) [2022-11-23 03:05:06,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:06,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:05:06,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:06,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:06,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 617648, now seen corresponding path program 1 times [2022-11-23 03:05:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395667303] [2022-11-23 03:05:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:06,967 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 [2022-11-23 03:05:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:06,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:06,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:05:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:07,096 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 [2022-11-23 03:05:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:07,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:07,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:07,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395667303] [2022-11-23 03:05:07,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395667303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:07,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:07,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:05:07,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922685712] [2022-11-23 03:05:07,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:07,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 382 [2022-11-23 03:05:07,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 241 flow. Second operand has 3 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) [2022-11-23 03:05:07,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:07,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 382 [2022-11-23 03:05:07,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:09,851 INFO L130 PetriNetUnfolder]: 14207/19638 cut-off events. [2022-11-23 03:05:09,851 INFO L131 PetriNetUnfolder]: For 1543/1543 co-relation queries the response was YES. [2022-11-23 03:05:09,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40030 conditions, 19638 events. 14207/19638 cut-off events. For 1543/1543 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104017 event pairs, 12482 based on Foata normal form. 10/8967 useless extension candidates. Maximal degree in co-relation 40025. Up to 18587 conditions per place. [2022-11-23 03:05:09,989 INFO L137 encePairwiseOnDemand]: 379/382 looper letters, 72 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2022-11-23 03:05:09,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 93 transitions, 399 flow [2022-11-23 03:05:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2022-11-23 03:05:09,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6160558464223386 [2022-11-23 03:05:09,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2022-11-23 03:05:09,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2022-11-23 03:05:09,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:09,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2022-11-23 03:05:09,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:09,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:09,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:09,999 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 706 transitions. [2022-11-23 03:05:09,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 93 transitions, 399 flow [2022-11-23 03:05:10,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:10,006 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 233 flow [2022-11-23 03:05:10,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2022-11-23 03:05:10,008 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2022-11-23 03:05:10,012 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 233 flow [2022-11-23 03:05:10,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-23 03:05:10,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:10,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:10,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:10,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:10,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash -890369065, now seen corresponding path program 1 times [2022-11-23 03:05:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:10,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855410424] [2022-11-23 03:05:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:10,225 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 [2022-11-23 03:05:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:10,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:10,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:05:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:10,380 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 [2022-11-23 03:05:10,386 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 [2022-11-23 03:05:10,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:10,447 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 [2022-11-23 03:05:10,474 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:10,475 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 [2022-11-23 03:05:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:10,592 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 12 treesize of output 14 [2022-11-23 03:05:10,656 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:10,656 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 [2022-11-23 03:05:10,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:10,723 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 12 treesize of output 14 [2022-11-23 03:05:10,753 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-23 03:05:10,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 03:05:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:10,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:10,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855410424] [2022-11-23 03:05:10,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855410424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:10,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:10,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:05:10,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59423310] [2022-11-23 03:05:10,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:10,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:05:10,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:05:10,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:05:12,524 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 382 [2022-11-23 03:05:12,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:12,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:12,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 382 [2022-11-23 03:05:12,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:15,082 INFO L130 PetriNetUnfolder]: 14199/19619 cut-off events. [2022-11-23 03:05:15,083 INFO L131 PetriNetUnfolder]: For 2982/2982 co-relation queries the response was YES. [2022-11-23 03:05:15,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41449 conditions, 19619 events. 14199/19619 cut-off events. For 2982/2982 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 103874 event pairs, 12469 based on Foata normal form. 0/8948 useless extension candidates. Maximal degree in co-relation 41443. Up to 18530 conditions per place. [2022-11-23 03:05:15,227 INFO L137 encePairwiseOnDemand]: 374/382 looper letters, 72 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2022-11-23 03:05:15,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 395 flow [2022-11-23 03:05:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:05:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:05:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1021 transitions. [2022-11-23 03:05:15,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5345549738219896 [2022-11-23 03:05:15,232 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1021 transitions. [2022-11-23 03:05:15,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1021 transitions. [2022-11-23 03:05:15,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:15,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1021 transitions. [2022-11-23 03:05:15,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:15,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:15,242 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:15,242 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 233 flow. Second operand 5 states and 1021 transitions. [2022-11-23 03:05:15,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 395 flow [2022-11-23 03:05:15,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:15,247 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 229 flow [2022-11-23 03:05:15,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-11-23 03:05:15,250 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2022-11-23 03:05:15,251 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 229 flow [2022-11-23 03:05:15,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:15,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:15,252 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:15,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:15,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1209846222, now seen corresponding path program 1 times [2022-11-23 03:05:15,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762337351] [2022-11-23 03:05:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:15,477 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 [2022-11-23 03:05:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:15,478 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:15,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 03:05:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:15,679 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 5 [2022-11-23 03:05:15,694 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 [2022-11-23 03:05:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:15,776 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 [2022-11-23 03:05:15,807 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:15,808 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 [2022-11-23 03:05:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:15,850 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 [2022-11-23 03:05:15,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:15,885 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 [2022-11-23 03:05:15,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:15,919 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 [2022-11-23 03:05:15,932 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:05:15,933 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 [2022-11-23 03:05:16,009 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 03:05:16,012 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 12 treesize of output 14 [2022-11-23 03:05:16,025 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 [2022-11-23 03:05:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:16,122 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 03:05:16,123 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 17 treesize of output 22 [2022-11-23 03:05:16,148 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:05:16,148 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 [2022-11-23 03:05:16,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:16,412 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 03:05:16,412 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 3 case distinctions, treesize of input 22 treesize of output 34 [2022-11-23 03:05:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:16,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:16,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:16,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762337351] [2022-11-23 03:05:16,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762337351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:16,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:16,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:05:16,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346421651] [2022-11-23 03:05:16,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:16,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:05:16,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:05:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:05:23,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 382 [2022-11-23 03:05:23,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:23,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:23,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 382 [2022-11-23 03:05:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:26,300 INFO L130 PetriNetUnfolder]: 8986/12612 cut-off events. [2022-11-23 03:05:26,301 INFO L131 PetriNetUnfolder]: For 2965/2965 co-relation queries the response was YES. [2022-11-23 03:05:26,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 12612 events. 8986/12612 cut-off events. For 2965/2965 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 64667 event pairs, 8799 based on Foata normal form. 1456/6951 useless extension candidates. Maximal degree in co-relation 26226. Up to 11883 conditions per place. [2022-11-23 03:05:26,377 INFO L137 encePairwiseOnDemand]: 371/382 looper letters, 65 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2022-11-23 03:05:26,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 392 flow [2022-11-23 03:05:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:05:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:05:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1028 transitions. [2022-11-23 03:05:26,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5382198952879581 [2022-11-23 03:05:26,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1028 transitions. [2022-11-23 03:05:26,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1028 transitions. [2022-11-23 03:05:26,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:26,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1028 transitions. [2022-11-23 03:05:26,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.6) internal successors, (1028), 5 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:26,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:26,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:26,391 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 229 flow. Second operand 5 states and 1028 transitions. [2022-11-23 03:05:26,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 392 flow [2022-11-23 03:05:26,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 382 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-23 03:05:26,394 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 237 flow [2022-11-23 03:05:26,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2022-11-23 03:05:26,395 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -12 predicate places. [2022-11-23 03:05:26,396 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 237 flow [2022-11-23 03:05:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:26,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:26,397 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:26,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:26,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -862749936, now seen corresponding path program 1 times [2022-11-23 03:05:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:26,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763243654] [2022-11-23 03:05:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:26,610 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 [2022-11-23 03:05:26,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:26,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:26,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:05:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:26,779 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 [2022-11-23 03:05:26,818 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:26,818 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 [2022-11-23 03:05:26,841 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:05:26,841 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 [2022-11-23 03:05:26,871 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:05:26,871 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 [2022-11-23 03:05:26,908 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:05:26,908 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 [2022-11-23 03:05:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:26,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:26,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:26,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763243654] [2022-11-23 03:05:26,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763243654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:26,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:26,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:05:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640984281] [2022-11-23 03:05:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:27,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 382 [2022-11-23 03:05:27,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 237 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) [2022-11-23 03:05:27,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:27,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 382 [2022-11-23 03:05:27,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:28,091 INFO L130 PetriNetUnfolder]: 7191/10303 cut-off events. [2022-11-23 03:05:28,091 INFO L131 PetriNetUnfolder]: For 1257/1257 co-relation queries the response was YES. [2022-11-23 03:05:28,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21356 conditions, 10303 events. 7191/10303 cut-off events. For 1257/1257 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 52744 event pairs, 5815 based on Foata normal form. 0/4729 useless extension candidates. Maximal degree in co-relation 21351. Up to 9579 conditions per place. [2022-11-23 03:05:28,146 INFO L137 encePairwiseOnDemand]: 378/382 looper letters, 65 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-11-23 03:05:28,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 371 flow [2022-11-23 03:05:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-11-23 03:05:28,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.581151832460733 [2022-11-23 03:05:28,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-11-23 03:05:28,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-11-23 03:05:28,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:28,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-11-23 03:05:28,152 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) [2022-11-23 03:05:28,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:28,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:28,155 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 237 flow. Second operand 3 states and 666 transitions. [2022-11-23 03:05:28,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 371 flow [2022-11-23 03:05:28,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:28,158 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 232 flow [2022-11-23 03:05:28,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=83, 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=232, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-11-23 03:05:28,159 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -14 predicate places. [2022-11-23 03:05:28,160 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 232 flow [2022-11-23 03:05:28,160 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) [2022-11-23 03:05:28,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:28,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:28,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:28,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:28,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash -862749935, now seen corresponding path program 1 times [2022-11-23 03:05:28,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:28,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780399749] [2022-11-23 03:05:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:28,378 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 [2022-11-23 03:05:28,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:28,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:28,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 03:05:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:28,551 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 [2022-11-23 03:05:28,569 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 [2022-11-23 03:05:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:28,610 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 [2022-11-23 03:05:28,644 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:28,644 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 [2022-11-23 03:05:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:28,667 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 [2022-11-23 03:05:28,704 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:28,704 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 [2022-11-23 03:05:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:28,727 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 [2022-11-23 03:05:28,740 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:05:28,740 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 [2022-11-23 03:05:28,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:28,812 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 [2022-11-23 03:05:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:28,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:28,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780399749] [2022-11-23 03:05:28,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780399749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:28,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:28,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:05:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162015273] [2022-11-23 03:05:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:05:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:05:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:05:29,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 382 [2022-11-23 03:05:29,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 232 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) [2022-11-23 03:05:29,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:29,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 382 [2022-11-23 03:05:29,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:30,842 INFO L130 PetriNetUnfolder]: 5398/7996 cut-off events. [2022-11-23 03:05:30,842 INFO L131 PetriNetUnfolder]: For 1004/1004 co-relation queries the response was YES. [2022-11-23 03:05:30,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16485 conditions, 7996 events. 5398/7996 cut-off events. For 1004/1004 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 41440 event pairs, 4273 based on Foata normal form. 0/3960 useless extension candidates. Maximal degree in co-relation 16480. Up to 7257 conditions per place. [2022-11-23 03:05:30,890 INFO L137 encePairwiseOnDemand]: 376/382 looper letters, 64 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2022-11-23 03:05:30,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 386 flow [2022-11-23 03:05:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:05:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:05:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1045 transitions. [2022-11-23 03:05:30,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5471204188481675 [2022-11-23 03:05:30,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1045 transitions. [2022-11-23 03:05:30,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1045 transitions. [2022-11-23 03:05:30,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:30,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1045 transitions. [2022-11-23 03:05:30,898 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) [2022-11-23 03:05:30,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:30,902 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:30,902 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 232 flow. Second operand 5 states and 1045 transitions. [2022-11-23 03:05:30,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 386 flow [2022-11-23 03:05:30,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:30,906 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 234 flow [2022-11-23 03:05:30,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2022-11-23 03:05:30,907 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -14 predicate places. [2022-11-23 03:05:30,908 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 234 flow [2022-11-23 03:05:30,908 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) [2022-11-23 03:05:30,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:30,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:30,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:31,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:31,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash -173987106, now seen corresponding path program 1 times [2022-11-23 03:05:31,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:31,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127458836] [2022-11-23 03:05:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:31,122 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 [2022-11-23 03:05:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:31,124 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:31,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:05:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:31,246 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 [2022-11-23 03:05:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:31,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:31,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:31,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127458836] [2022-11-23 03:05:31,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127458836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:31,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:31,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:05:31,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775119478] [2022-11-23 03:05:31,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:31,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:31,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:31,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 382 [2022-11-23 03:05:31,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 234 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) [2022-11-23 03:05:31,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:31,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 382 [2022-11-23 03:05:31,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:31,901 INFO L130 PetriNetUnfolder]: 1844/2932 cut-off events. [2022-11-23 03:05:31,902 INFO L131 PetriNetUnfolder]: For 416/416 co-relation queries the response was YES. [2022-11-23 03:05:31,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 2932 events. 1844/2932 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13461 event pairs, 1393 based on Foata normal form. 0/1762 useless extension candidates. Maximal degree in co-relation 6052. Up to 2556 conditions per place. [2022-11-23 03:05:31,916 INFO L137 encePairwiseOnDemand]: 375/382 looper letters, 58 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2022-11-23 03:05:31,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 354 flow [2022-11-23 03:05:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2022-11-23 03:05:31,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5619546247818499 [2022-11-23 03:05:31,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2022-11-23 03:05:31,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2022-11-23 03:05:31,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:31,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2022-11-23 03:05:31,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:31,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:31,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:31,925 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 234 flow. Second operand 3 states and 644 transitions. [2022-11-23 03:05:31,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 354 flow [2022-11-23 03:05:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 344 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:05:31,928 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 222 flow [2022-11-23 03:05:31,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2022-11-23 03:05:31,929 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -20 predicate places. [2022-11-23 03:05:31,929 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 222 flow [2022-11-23 03:05:31,930 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) [2022-11-23 03:05:31,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:31,930 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:31,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:32,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -173987105, now seen corresponding path program 1 times [2022-11-23 03:05:32,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:32,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750238907] [2022-11-23 03:05:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:32,143 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 [2022-11-23 03:05:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:32,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:32,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:05:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:32,279 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 [2022-11-23 03:05:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:32,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:32,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750238907] [2022-11-23 03:05:32,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750238907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:32,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:05:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579986464] [2022-11-23 03:05:32,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:32,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:32,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:32,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:32,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 382 [2022-11-23 03:05:32,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 222 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) [2022-11-23 03:05:32,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:32,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 382 [2022-11-23 03:05:32,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:32,819 INFO L130 PetriNetUnfolder]: 426/802 cut-off events. [2022-11-23 03:05:32,819 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2022-11-23 03:05:32,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 802 events. 426/802 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2854 event pairs, 280 based on Foata normal form. 0/658 useless extension candidates. Maximal degree in co-relation 1688. Up to 655 conditions per place. [2022-11-23 03:05:32,822 INFO L137 encePairwiseOnDemand]: 376/382 looper letters, 56 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2022-11-23 03:05:32,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 332 flow [2022-11-23 03:05:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2022-11-23 03:05:32,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5863874345549738 [2022-11-23 03:05:32,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2022-11-23 03:05:32,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2022-11-23 03:05:32,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:32,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2022-11-23 03:05:32,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:32,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:32,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:32,836 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 222 flow. Second operand 3 states and 672 transitions. [2022-11-23 03:05:32,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 332 flow [2022-11-23 03:05:32,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:32,838 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 208 flow [2022-11-23 03:05:32,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2022-11-23 03:05:32,839 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -25 predicate places. [2022-11-23 03:05:32,840 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 208 flow [2022-11-23 03:05:32,840 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) [2022-11-23 03:05:32,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:32,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:32,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:33,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:33,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash -173987046, now seen corresponding path program 1 times [2022-11-23 03:05:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:33,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319436542] [2022-11-23 03:05:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:33,056 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 [2022-11-23 03:05:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:33,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:33,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:05:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:33,224 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 [2022-11-23 03:05:33,264 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:33,264 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 [2022-11-23 03:05:33,296 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:33,296 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 [2022-11-23 03:05:33,323 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:05:33,323 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 [2022-11-23 03:05:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:33,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:33,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:33,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319436542] [2022-11-23 03:05:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319436542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:33,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:33,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:05:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115136219] [2022-11-23 03:05:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:33,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 382 [2022-11-23 03:05:33,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:33,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:33,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 382 [2022-11-23 03:05:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:33,835 INFO L130 PetriNetUnfolder]: 452/808 cut-off events. [2022-11-23 03:05:33,835 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-11-23 03:05:33,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 808 events. 452/808 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2687 event pairs, 297 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1732. Up to 678 conditions per place. [2022-11-23 03:05:33,838 INFO L137 encePairwiseOnDemand]: 378/382 looper letters, 54 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-11-23 03:05:33,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 320 flow [2022-11-23 03:05:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2022-11-23 03:05:33,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5715532286212914 [2022-11-23 03:05:33,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2022-11-23 03:05:33,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2022-11-23 03:05:33,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:33,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2022-11-23 03:05:33,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:33,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:33,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:33,862 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 208 flow. Second operand 3 states and 655 transitions. [2022-11-23 03:05:33,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 320 flow [2022-11-23 03:05:33,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:05:33,864 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 207 flow [2022-11-23 03:05:33,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-11-23 03:05:33,867 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2022-11-23 03:05:33,867 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 207 flow [2022-11-23 03:05:33,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:33,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:33,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:33,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:34,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:34,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash -173987048, now seen corresponding path program 1 times [2022-11-23 03:05:34,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915824783] [2022-11-23 03:05:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:34,081 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 [2022-11-23 03:05:34,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:34,082 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:34,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 03:05:34,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:34,240 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 [2022-11-23 03:05:34,250 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 [2022-11-23 03:05:34,310 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:34,310 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 [2022-11-23 03:05:34,320 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 [2022-11-23 03:05:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:34,344 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 [2022-11-23 03:05:34,356 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:05:34,357 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 [2022-11-23 03:05:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:34,425 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 [2022-11-23 03:05:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:34,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:34,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915824783] [2022-11-23 03:05:34,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915824783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:34,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:34,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:05:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300587532] [2022-11-23 03:05:34,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:34,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:05:34,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:05:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:05:35,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 382 [2022-11-23 03:05:35,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 207 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) [2022-11-23 03:05:35,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:35,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 382 [2022-11-23 03:05:35,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:36,003 INFO L130 PetriNetUnfolder]: 448/784 cut-off events. [2022-11-23 03:05:36,003 INFO L131 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-11-23 03:05:36,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 784 events. 448/784 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2495 event pairs, 291 based on Foata normal form. 0/678 useless extension candidates. Maximal degree in co-relation 1702. Up to 655 conditions per place. [2022-11-23 03:05:36,007 INFO L137 encePairwiseOnDemand]: 376/382 looper letters, 54 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2022-11-23 03:05:36,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 341 flow [2022-11-23 03:05:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:05:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:05:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2022-11-23 03:05:36,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5418848167539267 [2022-11-23 03:05:36,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2022-11-23 03:05:36,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2022-11-23 03:05:36,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:36,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2022-11-23 03:05:36,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:36,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:36,018 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:36,018 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 207 flow. Second operand 5 states and 1035 transitions. [2022-11-23 03:05:36,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 341 flow [2022-11-23 03:05:36,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:36,021 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 209 flow [2022-11-23 03:05:36,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=5, PETRI_FLOW=209, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2022-11-23 03:05:36,022 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2022-11-23 03:05:36,022 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 209 flow [2022-11-23 03:05:36,023 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) [2022-11-23 03:05:36,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:36,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:36,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:36,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:36,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash 302186726, now seen corresponding path program 1 times [2022-11-23 03:05:36,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:36,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665312701] [2022-11-23 03:05:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:36,237 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 [2022-11-23 03:05:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:36,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:36,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:05:36,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:36,415 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 [2022-11-23 03:05:36,448 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:36,448 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 [2022-11-23 03:05:36,477 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:05:36,478 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 [2022-11-23 03:05:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:36,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:36,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665312701] [2022-11-23 03:05:36,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665312701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:36,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:36,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:05:36,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298509483] [2022-11-23 03:05:36,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:36,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:36,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:36,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:36,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 382 [2022-11-23 03:05:36,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 209 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) [2022-11-23 03:05:36,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:36,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 382 [2022-11-23 03:05:36,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:36,976 INFO L130 PetriNetUnfolder]: 416/736 cut-off events. [2022-11-23 03:05:36,976 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-23 03:05:36,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 736 events. 416/736 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2323 event pairs, 271 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 1606. Up to 622 conditions per place. [2022-11-23 03:05:36,979 INFO L137 encePairwiseOnDemand]: 378/382 looper letters, 52 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-11-23 03:05:36,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 317 flow [2022-11-23 03:05:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-11-23 03:05:36,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5698080279232112 [2022-11-23 03:05:36,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-11-23 03:05:36,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-11-23 03:05:36,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:36,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-11-23 03:05:36,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:36,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:36,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:36,987 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 209 flow. Second operand 3 states and 653 transitions. [2022-11-23 03:05:36,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 317 flow [2022-11-23 03:05:36,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:05:36,990 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 199 flow [2022-11-23 03:05:36,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-23 03:05:36,990 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2022-11-23 03:05:36,991 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 199 flow [2022-11-23 03:05:36,991 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) [2022-11-23 03:05:36,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:36,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:05:37,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:37,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:37,204 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash 302186724, now seen corresponding path program 1 times [2022-11-23 03:05:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406490863] [2022-11-23 03:05:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:37,205 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 [2022-11-23 03:05:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:37,206 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:37,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:05:37,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:37,395 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 [2022-11-23 03:05:37,404 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 [2022-11-23 03:05:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:37,452 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 [2022-11-23 03:05:37,475 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:05:37,475 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 [2022-11-23 03:05:37,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:37,537 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 [2022-11-23 03:05:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:37,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:37,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:37,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406490863] [2022-11-23 03:05:37,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406490863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:37,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:37,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:05:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399528039] [2022-11-23 03:05:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:05:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:05:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:05:38,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 382 [2022-11-23 03:05:38,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:38,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:38,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 382 [2022-11-23 03:05:38,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:39,403 INFO L130 PetriNetUnfolder]: 404/708 cut-off events. [2022-11-23 03:05:39,403 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2022-11-23 03:05:39,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 708 events. 404/708 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2175 event pairs, 260 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 1546. Up to 587 conditions per place. [2022-11-23 03:05:39,405 INFO L137 encePairwiseOnDemand]: 376/382 looper letters, 52 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2022-11-23 03:05:39,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 329 flow [2022-11-23 03:05:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:05:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:05:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1033 transitions. [2022-11-23 03:05:39,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5408376963350785 [2022-11-23 03:05:39,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1033 transitions. [2022-11-23 03:05:39,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1033 transitions. [2022-11-23 03:05:39,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:39,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1033 transitions. [2022-11-23 03:05:39,412 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) [2022-11-23 03:05:39,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:39,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:39,416 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 199 flow. Second operand 5 states and 1033 transitions. [2022-11-23 03:05:39,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 329 flow [2022-11-23 03:05:39,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:39,419 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 201 flow [2022-11-23 03:05:39,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2022-11-23 03:05:39,420 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -30 predicate places. [2022-11-23 03:05:39,420 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 201 flow [2022-11-23 03:05:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:39,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:39,421 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] [2022-11-23 03:05:39,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:39,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:39,633 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1656319001, now seen corresponding path program 1 times [2022-11-23 03:05:39,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:39,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764361379] [2022-11-23 03:05:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:39,634 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 [2022-11-23 03:05:39,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:39,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:39,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:05:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:39,777 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 [2022-11-23 03:05:39,808 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:05:39,808 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 [2022-11-23 03:05:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:39,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:39,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:39,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764361379] [2022-11-23 03:05:39,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764361379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:39,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:39,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:05:39,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149372485] [2022-11-23 03:05:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:39,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:05:39,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:05:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:05:40,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 382 [2022-11-23 03:05:40,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 201 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) [2022-11-23 03:05:40,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:40,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 382 [2022-11-23 03:05:40,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:40,302 INFO L130 PetriNetUnfolder]: 363/647 cut-off events. [2022-11-23 03:05:40,302 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2022-11-23 03:05:40,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424 conditions, 647 events. 363/647 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1938 event pairs, 233 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 1419. Up to 539 conditions per place. [2022-11-23 03:05:40,304 INFO L137 encePairwiseOnDemand]: 378/382 looper letters, 49 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-11-23 03:05:40,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 303 flow [2022-11-23 03:05:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:05:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:05:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2022-11-23 03:05:40,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5671902268760908 [2022-11-23 03:05:40,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2022-11-23 03:05:40,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2022-11-23 03:05:40,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:40,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2022-11-23 03:05:40,309 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) [2022-11-23 03:05:40,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:40,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:40,313 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 201 flow. Second operand 3 states and 650 transitions. [2022-11-23 03:05:40,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 303 flow [2022-11-23 03:05:40,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 293 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:05:40,315 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 191 flow [2022-11-23 03:05:40,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2022-11-23 03:05:40,316 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2022-11-23 03:05:40,316 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 191 flow [2022-11-23 03:05:40,317 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) [2022-11-23 03:05:40,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:40,317 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] [2022-11-23 03:05:40,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:40,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:40,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1656318999, now seen corresponding path program 1 times [2022-11-23 03:05:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:40,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598469311] [2022-11-23 03:05:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:40,530 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 [2022-11-23 03:05:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:40,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:40,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:05:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:40,706 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 [2022-11-23 03:05:40,712 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 [2022-11-23 03:05:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:40,763 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 [2022-11-23 03:05:40,777 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:05:40,777 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 [2022-11-23 03:05:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:40,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:40,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598469311] [2022-11-23 03:05:40,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598469311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:40,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:40,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:05:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297114333] [2022-11-23 03:05:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:05:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:05:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:05:41,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 382 [2022-11-23 03:05:41,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 191 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) [2022-11-23 03:05:41,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:41,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 382 [2022-11-23 03:05:41,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:41,650 INFO L130 PetriNetUnfolder]: 331/595 cut-off events. [2022-11-23 03:05:41,650 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2022-11-23 03:05:41,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1308 conditions, 595 events. 331/595 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1720 event pairs, 208 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 1303. Up to 491 conditions per place. [2022-11-23 03:05:41,653 INFO L137 encePairwiseOnDemand]: 377/382 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2022-11-23 03:05:41,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 305 flow [2022-11-23 03:05:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:05:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:05:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2022-11-23 03:05:41,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5497382198952879 [2022-11-23 03:05:41,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2022-11-23 03:05:41,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2022-11-23 03:05:41,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:41,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2022-11-23 03:05:41,659 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) [2022-11-23 03:05:41,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:41,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:41,662 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 191 flow. Second operand 4 states and 840 transitions. [2022-11-23 03:05:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 305 flow [2022-11-23 03:05:41,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:05:41,664 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 191 flow [2022-11-23 03:05:41,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-11-23 03:05:41,665 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -35 predicate places. [2022-11-23 03:05:41,665 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 191 flow [2022-11-23 03:05:41,666 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) [2022-11-23 03:05:41,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:41,666 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] [2022-11-23 03:05:41,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:41,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:41,878 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2062152026, now seen corresponding path program 1 times [2022-11-23 03:05:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:41,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308446597] [2022-11-23 03:05:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:41,879 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 [2022-11-23 03:05:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:41,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:41,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:05:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:42,151 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 [2022-11-23 03:05:42,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:42,206 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 [2022-11-23 03:05:42,307 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:42,308 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 [2022-11-23 03:05:42,391 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:42,392 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 [2022-11-23 03:05:42,464 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:42,465 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 [2022-11-23 03:05:42,546 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:42,547 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 [2022-11-23 03:05:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:42,670 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 03:05:42,671 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 21 treesize of output 36 [2022-11-23 03:05:43,829 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 [2022-11-23 03:05:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:43,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:43,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:43,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308446597] [2022-11-23 03:05:43,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308446597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:43,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:43,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:05:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550049101] [2022-11-23 03:05:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:05:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:05:43,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:05:46,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 382 [2022-11-23 03:05:46,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:46,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:46,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 382 [2022-11-23 03:05:46,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:47,231 INFO L130 PetriNetUnfolder]: 326/589 cut-off events. [2022-11-23 03:05:47,231 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-11-23 03:05:47,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 589 events. 326/589 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1713 event pairs, 205 based on Foata normal form. 1/556 useless extension candidates. Maximal degree in co-relation 1287. Up to 486 conditions per place. [2022-11-23 03:05:47,233 INFO L137 encePairwiseOnDemand]: 377/382 looper letters, 45 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2022-11-23 03:05:47,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 301 flow [2022-11-23 03:05:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:05:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:05:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2022-11-23 03:05:47,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5425392670157068 [2022-11-23 03:05:47,236 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2022-11-23 03:05:47,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2022-11-23 03:05:47,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:47,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2022-11-23 03:05:47,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:47,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:47,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:47,242 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 191 flow. Second operand 4 states and 829 transitions. [2022-11-23 03:05:47,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 301 flow [2022-11-23 03:05:47,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:05:47,244 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 200 flow [2022-11-23 03:05:47,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-11-23 03:05:47,245 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2022-11-23 03:05:47,245 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 200 flow [2022-11-23 03:05:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:47,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:47,246 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] [2022-11-23 03:05:47,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:47,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:47,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash 497794653, now seen corresponding path program 1 times [2022-11-23 03:05:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:47,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622470074] [2022-11-23 03:05:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:47,465 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 [2022-11-23 03:05:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:47,466 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:47,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:05:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:47,739 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 7 [2022-11-23 03:05:47,790 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:47,790 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 [2022-11-23 03:05:47,880 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:47,880 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 [2022-11-23 03:05:48,022 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:48,022 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 [2022-11-23 03:05:48,108 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:48,108 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 [2022-11-23 03:05:48,234 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:48,234 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 [2022-11-23 03:05:48,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:48,406 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 03:05:48,406 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 [2022-11-23 03:05:50,061 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 [2022-11-23 03:05:50,239 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 [2022-11-23 03:05:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:50,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:05:50,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:05:50,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622470074] [2022-11-23 03:05:50,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622470074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:05:50,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:05:50,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:05:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515534822] [2022-11-23 03:05:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:05:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:05:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:05:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:05:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:05:54,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 382 [2022-11-23 03:05:54,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 200 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) [2022-11-23 03:05:54,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:05:54,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 382 [2022-11-23 03:05:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:05:55,282 INFO L130 PetriNetUnfolder]: 326/588 cut-off events. [2022-11-23 03:05:55,282 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2022-11-23 03:05:55,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 588 events. 326/588 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1709 event pairs, 204 based on Foata normal form. 1/555 useless extension candidates. Maximal degree in co-relation 1294. Up to 486 conditions per place. [2022-11-23 03:05:55,285 INFO L137 encePairwiseOnDemand]: 375/382 looper letters, 45 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2022-11-23 03:05:55,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 326 flow [2022-11-23 03:05:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:05:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:05:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1200 transitions. [2022-11-23 03:05:55,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5235602094240838 [2022-11-23 03:05:55,289 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1200 transitions. [2022-11-23 03:05:55,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1200 transitions. [2022-11-23 03:05:55,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:55,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1200 transitions. [2022-11-23 03:05:55,292 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) [2022-11-23 03:05:55,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 382.0) internal successors, (2674), 7 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:55,296 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 382.0) internal successors, (2674), 7 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:05:55,296 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 200 flow. Second operand 6 states and 1200 transitions. [2022-11-23 03:05:55,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 326 flow [2022-11-23 03:05:55,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 316 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:05:55,299 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 214 flow [2022-11-23 03:05:55,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2022-11-23 03:05:55,299 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -31 predicate places. [2022-11-23 03:05:55,300 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 214 flow [2022-11-23 03:05:55,300 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) [2022-11-23 03:05:55,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:55,301 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] [2022-11-23 03:05:55,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:55,513 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:05:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1748239681, now seen corresponding path program 1 times [2022-11-23 03:05:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:05:55,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851474098] [2022-11-23 03:05:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:55,514 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 [2022-11-23 03:05:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:05:55,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:05:55,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:05:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 03:05:55,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:55,811 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 [2022-11-23 03:05:55,870 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:05:55,870 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 [2022-11-23 03:05:55,957 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:55,957 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 [2022-11-23 03:05:56,098 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:05:56,099 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 [2022-11-23 03:05:56,337 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-23 03:05:56,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-23 03:05:56,506 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-23 03:05:56,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-23 03:05:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:56,849 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-23 03:05:56,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2022-11-23 03:06:00,327 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 0 case distinctions, treesize of input 60 treesize of output 67 [2022-11-23 03:06:00,774 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 03:06:00,774 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 37 treesize of output 52 [2022-11-23 03:06:00,972 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 [2022-11-23 03:06:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:06:01,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:06:01,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:06:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851474098] [2022-11-23 03:06:01,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851474098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:06:01,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:06:01,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 03:06:01,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859058194] [2022-11-23 03:06:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:06:01,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:06:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:06:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:06:01,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:06:06,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 382 [2022-11-23 03:06:06,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 214 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) [2022-11-23 03:06:06,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:06:06,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 382 [2022-11-23 03:06:06,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:06:07,734 INFO L130 PetriNetUnfolder]: 326/587 cut-off events. [2022-11-23 03:06:07,734 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-23 03:06:07,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 587 events. 326/587 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1700 event pairs, 203 based on Foata normal form. 1/554 useless extension candidates. Maximal degree in co-relation 1304. Up to 486 conditions per place. [2022-11-23 03:06:07,736 INFO L137 encePairwiseOnDemand]: 374/382 looper letters, 46 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2022-11-23 03:06:07,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 348 flow [2022-11-23 03:06:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:06:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:06:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1555 transitions. [2022-11-23 03:06:07,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5088350785340314 [2022-11-23 03:06:07,742 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1555 transitions. [2022-11-23 03:06:07,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1555 transitions. [2022-11-23 03:06:07,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:06:07,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1555 transitions. [2022-11-23 03:06:07,747 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) [2022-11-23 03:06:07,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 382.0) internal successors, (3438), 9 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:07,753 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 382.0) internal successors, (3438), 9 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:07,754 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 214 flow. Second operand 8 states and 1555 transitions. [2022-11-23 03:06:07,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 348 flow [2022-11-23 03:06:07,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 332 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-23 03:06:07,757 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 222 flow [2022-11-23 03:06:07,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2022-11-23 03:06:07,758 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -28 predicate places. [2022-11-23 03:06:07,758 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 222 flow [2022-11-23 03:06:07,759 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) [2022-11-23 03:06:07,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:06:07,759 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] [2022-11-23 03:06:07,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:07,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:07,973 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:06:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:06:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1639143221, now seen corresponding path program 1 times [2022-11-23 03:06:07,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:06:07,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652440697] [2022-11-23 03:06:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:06:07,974 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 [2022-11-23 03:06:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:06:07,976 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:06:07,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:06:08,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 03:06:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:06:08,224 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 [2022-11-23 03:06:08,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:06:08,274 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 [2022-11-23 03:06:08,364 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:06:08,364 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 [2022-11-23 03:06:08,509 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:06:08,510 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 [2022-11-23 03:06:08,701 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:06:08,701 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 [2022-11-23 03:06:08,922 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:06:08,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 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 [2022-11-23 03:06:09,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:06:09,319 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 03:06:09,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-11-23 03:06:13,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 48 [2022-11-23 03:06:13,841 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 [2022-11-23 03:06:13,956 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 [2022-11-23 03:06:14,041 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 [2022-11-23 03:06:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:06:14,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:06:14,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:06:14,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652440697] [2022-11-23 03:06:14,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652440697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:06:14,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:06:14,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 03:06:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763497988] [2022-11-23 03:06:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:06:14,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:06:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:06:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:06:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:06:19,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 382 [2022-11-23 03:06:19,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 222 flow. Second operand has 12 states, 12 states have (on average 187.83333333333334) internal successors, (2254), 12 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:19,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:06:19,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 382 [2022-11-23 03:06:19,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:06:21,320 INFO L130 PetriNetUnfolder]: 326/586 cut-off events. [2022-11-23 03:06:21,320 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-11-23 03:06:21,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 586 events. 326/586 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1696 event pairs, 202 based on Foata normal form. 1/553 useless extension candidates. Maximal degree in co-relation 1307. Up to 486 conditions per place. [2022-11-23 03:06:21,322 INFO L137 encePairwiseOnDemand]: 372/382 looper letters, 46 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2022-11-23 03:06:21,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 372 flow [2022-11-23 03:06:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 03:06:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 03:06:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1904 transitions. [2022-11-23 03:06:21,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49842931937172774 [2022-11-23 03:06:21,329 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1904 transitions. [2022-11-23 03:06:21,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1904 transitions. [2022-11-23 03:06:21,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:06:21,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1904 transitions. [2022-11-23 03:06:21,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 190.4) internal successors, (1904), 10 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:21,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 382.0) internal successors, (4202), 11 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:21,341 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 382.0) internal successors, (4202), 11 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:21,341 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 222 flow. Second operand 10 states and 1904 transitions. [2022-11-23 03:06:21,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 372 flow [2022-11-23 03:06:21,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 66 transitions, 354 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-23 03:06:21,345 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 234 flow [2022-11-23 03:06:21,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=234, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2022-11-23 03:06:21,346 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -25 predicate places. [2022-11-23 03:06:21,346 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 234 flow [2022-11-23 03:06:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.83333333333334) internal successors, (2254), 12 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:21,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:06:21,347 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] [2022-11-23 03:06:21,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Ended with exit code 0 [2022-11-23 03:06:21,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:21,560 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:06:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:06:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash -726167388, now seen corresponding path program 1 times [2022-11-23 03:06:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:06:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29576881] [2022-11-23 03:06:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:06:21,561 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 [2022-11-23 03:06:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:06:21,562 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:06:21,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:06:21,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 03:06:21,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:06:21,835 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 [2022-11-23 03:06:21,889 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:06:21,889 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 [2022-11-23 03:06:21,986 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:06:21,986 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 [2022-11-23 03:06:22,134 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:06:22,134 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 [2022-11-23 03:06:22,370 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-23 03:06:22,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-23 03:06:22,668 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-23 03:06:22,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-23 03:06:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:06:23,647 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-23 03:06:23,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2022-11-23 03:06:31,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 67 [2022-11-23 03:06:31,756 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 03:06:31,757 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 37 treesize of output 52 [2022-11-23 03:06:32,088 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 [2022-11-23 03:06:32,200 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 [2022-11-23 03:06:32,311 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 [2022-11-23 03:06:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:06:32,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:06:32,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:06:32,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29576881] [2022-11-23 03:06:32,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29576881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:06:32,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:06:32,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 03:06:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349976974] [2022-11-23 03:06:32,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:06:32,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:06:32,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:06:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:06:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:06:40,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 382 [2022-11-23 03:06:40,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 234 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) [2022-11-23 03:06:40,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:06:40,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 382 [2022-11-23 03:06:40,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:06:42,205 INFO L130 PetriNetUnfolder]: 326/585 cut-off events. [2022-11-23 03:06:42,205 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-11-23 03:06:42,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 585 events. 326/585 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1694 event pairs, 202 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 1309. Up to 483 conditions per place. [2022-11-23 03:06:42,207 INFO L137 encePairwiseOnDemand]: 370/382 looper letters, 43 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2022-11-23 03:06:42,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 66 transitions, 376 flow [2022-11-23 03:06:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:06:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:06:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2033 transitions. [2022-11-23 03:06:42,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48381722989052833 [2022-11-23 03:06:42,217 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2033 transitions. [2022-11-23 03:06:42,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2033 transitions. [2022-11-23 03:06:42,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:06:42,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2033 transitions. [2022-11-23 03:06:42,221 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) [2022-11-23 03:06:42,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 382.0) internal successors, (4584), 12 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:42,224 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 382.0) internal successors, (4584), 12 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:06:42,224 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 234 flow. Second operand 11 states and 2033 transitions. [2022-11-23 03:06:42,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 66 transitions, 376 flow [2022-11-23 03:06:42,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 333 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-23 03:06:42,227 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 209 flow [2022-11-23 03:06:42,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=209, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2022-11-23 03:06:42,228 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -29 predicate places. [2022-11-23 03:06:42,228 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 209 flow [2022-11-23 03:06:42,229 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) [2022-11-23 03:06:42,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:06:42,229 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] [2022-11-23 03:06:42,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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)] Forceful destruction successful, exit code 0 [2022-11-23 03:06:42,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:42,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-23 03:06:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:06:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2062144048, now seen corresponding path program 1 times [2022-11-23 03:06:42,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:06:42,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792005370] [2022-11-23 03:06:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:06:42,443 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 [2022-11-23 03:06:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:06:42,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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) [2022-11-23 03:06:42,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 (22)] Waiting until timeout for monitored process [2022-11-23 03:06:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:06:42,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:06:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:06:43,005 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-23 03:06:43,019 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:06:43,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (70 of 71 remaining) [2022-11-23 03:06:43,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 71 remaining) [2022-11-23 03:06:43,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 71 remaining) [2022-11-23 03:06:43,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 71 remaining) [2022-11-23 03:06:43,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 71 remaining) [2022-11-23 03:06:43,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 71 remaining) [2022-11-23 03:06:43,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 71 remaining) [2022-11-23 03:06:43,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 71 remaining) [2022-11-23 03:06:43,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 71 remaining) [2022-11-23 03:06:43,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 71 remaining) [2022-11-23 03:06:43,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 71 remaining) [2022-11-23 03:06:43,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 71 remaining) [2022-11-23 03:06:43,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 71 remaining) [2022-11-23 03:06:43,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 71 remaining) [2022-11-23 03:06:43,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 71 remaining) [2022-11-23 03:06:43,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 71 remaining) [2022-11-23 03:06:43,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 71 remaining) [2022-11-23 03:06:43,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 71 remaining) [2022-11-23 03:06:43,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 71 remaining) [2022-11-23 03:06:43,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 71 remaining) [2022-11-23 03:06:43,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 71 remaining) [2022-11-23 03:06:43,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 71 remaining) [2022-11-23 03:06:43,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 71 remaining) [2022-11-23 03:06:43,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 71 remaining) [2022-11-23 03:06:43,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 71 remaining) [2022-11-23 03:06:43,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 71 remaining) [2022-11-23 03:06:43,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 71 remaining) [2022-11-23 03:06:43,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 71 remaining) [2022-11-23 03:06:43,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 71 remaining) [2022-11-23 03:06:43,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 71 remaining) [2022-11-23 03:06:43,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 71 remaining) [2022-11-23 03:06:43,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 71 remaining) [2022-11-23 03:06:43,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 71 remaining) [2022-11-23 03:06:43,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 71 remaining) [2022-11-23 03:06:43,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 71 remaining) [2022-11-23 03:06:43,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 71 remaining) [2022-11-23 03:06:43,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (34 of 71 remaining) [2022-11-23 03:06:43,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 71 remaining) [2022-11-23 03:06:43,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 71 remaining) [2022-11-23 03:06:43,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 71 remaining) [2022-11-23 03:06:43,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 71 remaining) [2022-11-23 03:06:43,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 71 remaining) [2022-11-23 03:06:43,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 71 remaining) [2022-11-23 03:06:43,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 71 remaining) [2022-11-23 03:06:43,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 71 remaining) [2022-11-23 03:06:43,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 71 remaining) [2022-11-23 03:06:43,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 71 remaining) [2022-11-23 03:06:43,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 71 remaining) [2022-11-23 03:06:43,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 71 remaining) [2022-11-23 03:06:43,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 71 remaining) [2022-11-23 03:06:43,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 71 remaining) [2022-11-23 03:06:43,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 71 remaining) [2022-11-23 03:06:43,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 71 remaining) [2022-11-23 03:06:43,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 71 remaining) [2022-11-23 03:06:43,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 71 remaining) [2022-11-23 03:06:43,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 71 remaining) [2022-11-23 03:06:43,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 71 remaining) [2022-11-23 03:06:43,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 71 remaining) [2022-11-23 03:06:43,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 71 remaining) [2022-11-23 03:06:43,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 71 remaining) [2022-11-23 03:06:43,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 71 remaining) [2022-11-23 03:06:43,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 71 remaining) [2022-11-23 03:06:43,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork5Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 71 remaining) [2022-11-23 03:06:43,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 71 remaining) [2022-11-23 03:06:43,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 71 remaining) [2022-11-23 03:06:43,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 71 remaining) [2022-11-23 03:06:43,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 71 remaining) [2022-11-23 03:06:43,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 71 remaining) [2022-11-23 03:06:43,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 71 remaining) [2022-11-23 03:06:43,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 71 remaining) [2022-11-23 03:06:43,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 71 remaining) [2022-11-23 03:06:43,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:06:43,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 [2022-11-23 03:06:43,248 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:06:43,254 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 03:06:43,255 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 03:06:43,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:06:43 BasicIcfg [2022-11-23 03:06:43,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 03:06:43,383 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 03:06:43,383 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 03:06:43,383 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 03:06:43,384 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:43" (3/4) ... [2022-11-23 03:06:43,387 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 03:06:43,387 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 03:06:43,387 INFO L158 Benchmark]: Toolchain (without parser) took 121500.05ms. Allocated memory was 79.7MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 55.2MB in the beginning and 4.7GB in the end (delta: -4.6GB). Peak memory consumption was 728.7MB. Max. memory is 16.1GB. [2022-11-23 03:06:43,388 INFO L158 Benchmark]: CDTParser took 0.98ms. Allocated memory is still 79.7MB. Free memory is still 56.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:06:43,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 967.69ms. Allocated memory is still 79.7MB. Free memory was 54.9MB in the beginning and 41.7MB in the end (delta: 13.2MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. [2022-11-23 03:06:43,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.91ms. Allocated memory is still 79.7MB. Free memory was 41.7MB in the beginning and 38.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:06:43,389 INFO L158 Benchmark]: Boogie Preprocessor took 38.00ms. Allocated memory is still 79.7MB. Free memory was 38.9MB in the beginning and 36.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 03:06:43,389 INFO L158 Benchmark]: RCFGBuilder took 999.63ms. Allocated memory was 79.7MB in the beginning and 107.0MB in the end (delta: 27.3MB). Free memory was 36.9MB in the beginning and 63.8MB in the end (delta: -26.9MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2022-11-23 03:06:43,389 INFO L158 Benchmark]: TraceAbstraction took 119414.41ms. Allocated memory was 107.0MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 63.4MB in the beginning and 4.7GB in the end (delta: -4.6GB). Peak memory consumption was 707.5MB. Max. memory is 16.1GB. [2022-11-23 03:06:43,389 INFO L158 Benchmark]: Witness Printer took 3.96ms. Allocated memory is still 5.4GB. Free memory is still 4.7GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:06:43,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98ms. Allocated memory is still 79.7MB. Free memory is still 56.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 967.69ms. Allocated memory is still 79.7MB. Free memory was 54.9MB in the beginning and 41.7MB in the end (delta: 13.2MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.91ms. Allocated memory is still 79.7MB. Free memory was 41.7MB in the beginning and 38.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.00ms. Allocated memory is still 79.7MB. Free memory was 38.9MB in the beginning and 36.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 999.63ms. Allocated memory was 79.7MB in the beginning and 107.0MB in the end (delta: 27.3MB). Free memory was 36.9MB in the beginning and 63.8MB in the end (delta: -26.9MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * TraceAbstraction took 119414.41ms. Allocated memory was 107.0MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 63.4MB in the beginning and 4.7GB in the end (delta: -4.6GB). Peak memory consumption was 707.5MB. Max. memory is 16.1GB. * Witness Printer took 3.96ms. Allocated memory is still 5.4GB. Free memory is still 4.7GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14.3s, 178 PlacesBefore, 99 PlacesAfterwards, 165 TransitionsBefore, 85 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 45 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 131 TotalNumberOfCompositions, 6667 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4436, independent: 4202, independent conditional: 0, independent unconditional: 4202, dependent: 234, dependent conditional: 0, dependent unconditional: 234, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1589, independent: 1505, independent conditional: 0, independent unconditional: 1505, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1589, independent: 1486, independent conditional: 0, independent unconditional: 1486, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 103, independent: 19, independent conditional: 0, independent unconditional: 19, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1105, independent: 183, independent conditional: 0, independent unconditional: 183, dependent: 921, dependent conditional: 0, dependent unconditional: 921, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4436, independent: 2697, independent conditional: 0, independent unconditional: 2697, dependent: 150, dependent conditional: 0, dependent unconditional: 150, unknown: 1589, unknown conditional: 0, unknown unconditional: 1589] , Statistics on independence cache: Total cache size (in pairs): 256, Positive cache size: 220, Positive conditional cache size: 0, Positive unconditional cache size: 220, Negative cache size: 36, Negative conditional cache size: 0, Negative unconditional cache size: 36, 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 [#in~arg={0:0}, pthread_create(&t, 0, thread0, 0)=4, t={8388611:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=5, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={0:0}] [L1148] 1 \read(t1) VAL [#in~arg={0:0}, #in~arg={0:0}, \read(t1)=5, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, \read(t1)=5, \result={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=6, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=7, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=8, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=9, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] 1 \read(t2) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t2)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t2)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1154] 1 \read(t3) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t3)=7, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t3)=7, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1155] 1 \read(t4) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t4)=8, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t4)=8, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1156] 1 \read(t5) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t5)=9, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t5)=9, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={8388615:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t2={8388623:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1157] 1 return 0; VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t3={23:0}, t4={19:0}, t5={27:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] 0 \read(t) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t)=4, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={8388611:0}, v={3:0}] [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [#in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, #in~arg={0:0}, \read(t)=4, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={8388611:0}, 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: 119.0s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 66.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 14.5s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 8598 SdHoareTripleChecker+Valid, 48.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5855 mSDsluCounter, 861 SdHoareTripleChecker+Invalid, 45.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 508 mSDsCounter, 547 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11172 IncrementalHoareTripleChecker+Invalid, 11721 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 547 mSolverCounterUnsat, 353 mSDtfsCounter, 11172 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 417 GetRequests, 305 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=241occurred in iteration=2, InterpolantAutomatonStates: 94, 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: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 29.4s InterpolantComputationTime, 443 NumberOfCodeBlocks, 443 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 378 ConstructedInterpolants, 173 QuantifiedInterpolants, 12561 SizeOfPredicates, 58 NumberOfNonLiveVariables, 2841 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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 [2022-11-23 03:06:43,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd6279f-0843-4468-9b75-7d2d15aac7f5/bin/uautomizer-QkZJyEgLgS/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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample