./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R --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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- 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-38b53e6 [2022-11-25 16:43:05,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:43:05,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:43:05,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:43:05,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:43:05,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:43:05,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:43:05,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:43:05,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:43:05,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:43:05,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:43:05,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:43:05,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:43:05,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:43:05,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:43:05,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:43:05,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:43:05,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:43:05,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:43:05,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:43:05,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:43:05,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:43:05,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:43:05,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:43:05,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:43:05,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:43:05,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:43:05,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:43:05,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:43:05,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:43:05,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:43:05,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:43:05,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:43:05,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:43:05,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:43:05,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:43:05,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:43:05,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:43:05,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:43:05,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:43:05,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:43:05,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:43:05,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:43:05,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:43:05,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:43:05,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:43:05,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:43:05,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:43:05,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:43:05,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:43:05,461 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:43:05,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:43:05,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:43:05,462 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:43:05,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:43:05,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:43:05,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:43:05,463 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:43:05,463 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:43:05,464 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:43:05,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:43:05,464 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:43:05,465 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:43:05,465 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:43:05,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:43:05,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:43:05,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:43:05,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:43:05,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:43:05,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:43:05,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:43:05,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:43:05,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:43:05,468 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:43:05,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:43:05,469 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_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-11-25 16:43:05,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:43:05,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:43:05,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:43:05,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:43:05,828 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:43:05,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-25 16:43:09,235 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:43:09,503 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:43:09,504 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-25 16:43:09,517 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/data/935db477a/e9a91db1cb8e4ac49574906739332623/FLAG4f463bba1 [2022-11-25 16:43:09,535 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/data/935db477a/e9a91db1cb8e4ac49574906739332623 [2022-11-25 16:43:09,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:43:09,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:43:09,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:43:09,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:43:09,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:43:09,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:43:09" (1/1) ... [2022-11-25 16:43:09,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696ffeae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:09, skipping insertion in model container [2022-11-25 16:43:09,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:43:09" (1/1) ... [2022-11-25 16:43:09,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:43:09,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:43:10,020 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_40e9a913-4059-419a-a5b7-b47e54f597a2/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-25 16:43:10,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:43:10,042 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:43:10,084 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_40e9a913-4059-419a-a5b7-b47e54f597a2/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-25 16:43:10,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:43:10,125 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:43:10,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10 WrapperNode [2022-11-25 16:43:10,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:43:10,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:43:10,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:43:10,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:43:10,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,174 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-11-25 16:43:10,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:43:10,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:43:10,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:43:10,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:43:10,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,203 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:43:10,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:43:10,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:43:10,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:43:10,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (1/1) ... [2022-11-25 16:43:10,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:43:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:10,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:43:10,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:43:10,306 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-25 16:43:10,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-25 16:43:10,307 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 16:43:10,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 16:43:10,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:43:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:43:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:43:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:43:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:43:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:43:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:43:10,314 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:43:10,459 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:43:10,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:43:10,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:43:10,839 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:43:10,840 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 16:43:10,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:43:10 BoogieIcfgContainer [2022-11-25 16:43:10,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:43:10,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:43:10,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:43:10,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:43:10,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:43:09" (1/3) ... [2022-11-25 16:43:10,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21be1b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:43:10, skipping insertion in model container [2022-11-25 16:43:10,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:10" (2/3) ... [2022-11-25 16:43:10,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21be1b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:43:10, skipping insertion in model container [2022-11-25 16:43:10,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:43:10" (3/3) ... [2022-11-25 16:43:10,853 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-11-25 16:43:10,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:43:10,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 16:43:10,877 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:43:10,931 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:43:10,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 156 flow [2022-11-25 16:43:11,025 INFO L130 PetriNetUnfolder]: 7/88 cut-off events. [2022-11-25 16:43:11,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:11,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2022-11-25 16:43:11,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 73 transitions, 156 flow [2022-11-25 16:43:11,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 72 transitions, 152 flow [2022-11-25 16:43:11,043 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:43:11,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 72 transitions, 152 flow [2022-11-25 16:43:11,065 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 72 transitions, 152 flow [2022-11-25 16:43:11,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 72 transitions, 152 flow [2022-11-25 16:43:11,094 INFO L130 PetriNetUnfolder]: 7/88 cut-off events. [2022-11-25 16:43:11,094 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2022-11-25 16:43:11,098 INFO L119 LiptonReduction]: Number of co-enabled transitions 1340 [2022-11-25 16:43:13,610 INFO L134 LiptonReduction]: Checked pairs total: 2109 [2022-11-25 16:43:13,611 INFO L136 LiptonReduction]: Total number of compositions: 64 [2022-11-25 16:43:13,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:43:13,634 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;@6e4f9ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:43:13,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 16:43:13,636 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:43:13,636 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:13,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:13,637 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:43:13,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:43:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash 398, now seen corresponding path program 1 times [2022-11-25 16:43:13,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:13,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244931825] [2022-11-25 16:43:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:13,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:13,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:13,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244931825] [2022-11-25 16:43:13,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244931825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:13,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:13,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:43:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4034954] [2022-11-25 16:43:13,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:43:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:43:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:43:13,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2022-11-25 16:43:13,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:13,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:13,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2022-11-25 16:43:13,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:13,977 INFO L130 PetriNetUnfolder]: 194/324 cut-off events. [2022-11-25 16:43:13,978 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:43:13,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 324 events. 194/324 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1245 event pairs, 144 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 647. Up to 312 conditions per place. [2022-11-25 16:43:13,983 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 15 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2022-11-25 16:43:13,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 76 flow [2022-11-25 16:43:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:43:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:43:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 140 transitions. [2022-11-25 16:43:13,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5109489051094891 [2022-11-25 16:43:14,000 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 140 transitions. [2022-11-25 16:43:14,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 140 transitions. [2022-11-25 16:43:14,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:14,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 140 transitions. [2022-11-25 16:43:14,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,012 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,015 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 60 flow. Second operand 2 states and 140 transitions. [2022-11-25 16:43:14,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 76 flow [2022-11-25 16:43:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:14,020 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 45 flow [2022-11-25 16:43:14,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=45, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-11-25 16:43:14,026 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 16:43:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 45 flow [2022-11-25 16:43:14,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:14,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:43:14,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:43:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash 12127917, now seen corresponding path program 1 times [2022-11-25 16:43:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:14,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354591229] [2022-11-25 16:43:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354591229] [2022-11-25 16:43:14,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354591229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:14,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:14,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:14,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564475669] [2022-11-25 16:43:14,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:14,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:14,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2022-11-25 16:43:14,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:14,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2022-11-25 16:43:14,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:14,356 INFO L130 PetriNetUnfolder]: 150/256 cut-off events. [2022-11-25 16:43:14,359 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:43:14,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 256 events. 150/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 941 event pairs, 110 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 517. Up to 243 conditions per place. [2022-11-25 16:43:14,366 INFO L137 encePairwiseOnDemand]: 135/137 looper letters, 13 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2022-11-25 16:43:14,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 71 flow [2022-11-25 16:43:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2022-11-25 16:43:14,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2022-11-25 16:43:14,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2022-11-25 16:43:14,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2022-11-25 16:43:14,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:14,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2022-11-25 16:43:14,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,377 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 45 flow. Second operand 3 states and 171 transitions. [2022-11-25 16:43:14,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 71 flow [2022-11-25 16:43:14,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 71 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:43:14,378 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 45 flow [2022-11-25 16:43:14,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2022-11-25 16:43:14,379 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-11-25 16:43:14,380 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 45 flow [2022-11-25 16:43:14,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:14,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:14,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:43:14,381 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:43:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash 12127918, now seen corresponding path program 1 times [2022-11-25 16:43:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:14,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129337018] [2022-11-25 16:43:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:14,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:14,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:14,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129337018] [2022-11-25 16:43:14,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129337018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:14,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:14,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760285157] [2022-11-25 16:43:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:14,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:14,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:14,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 137 [2022-11-25 16:43:14,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:14,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 137 [2022-11-25 16:43:14,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:14,587 INFO L130 PetriNetUnfolder]: 106/188 cut-off events. [2022-11-25 16:43:14,587 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:43:14,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 188 events. 106/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 618 event pairs, 76 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 382. Up to 175 conditions per place. [2022-11-25 16:43:14,590 INFO L137 encePairwiseOnDemand]: 135/137 looper letters, 12 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 16:43:14,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 69 flow [2022-11-25 16:43:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-11-25 16:43:14,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40632603406326034 [2022-11-25 16:43:14,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-11-25 16:43:14,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-11-25 16:43:14,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:14,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-11-25 16:43:14,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,596 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 45 flow. Second operand 3 states and 167 transitions. [2022-11-25 16:43:14,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 69 flow [2022-11-25 16:43:14,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:14,598 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 44 flow [2022-11-25 16:43:14,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2022-11-25 16:43:14,599 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-11-25 16:43:14,599 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 44 flow [2022-11-25 16:43:14,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:14,600 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:43:14,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:43:14,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:43:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:14,601 INFO L85 PathProgramCache]: Analyzing trace with hash 375921308, now seen corresponding path program 1 times [2022-11-25 16:43:14,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:14,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851921175] [2022-11-25 16:43:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:14,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:14,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:14,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851921175] [2022-11-25 16:43:14,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851921175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:14,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:14,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:14,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707108117] [2022-11-25 16:43:14,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:14,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:14,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2022-11-25 16:43:14,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:14,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2022-11-25 16:43:14,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:14,783 INFO L130 PetriNetUnfolder]: 119/204 cut-off events. [2022-11-25 16:43:14,784 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 16:43:14,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 204 events. 119/204 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 662 event pairs, 30 based on Foata normal form. 9/210 useless extension candidates. Maximal degree in co-relation 414. Up to 138 conditions per place. [2022-11-25 16:43:14,786 INFO L137 encePairwiseOnDemand]: 134/137 looper letters, 17 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-11-25 16:43:14,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 94 flow [2022-11-25 16:43:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2022-11-25 16:43:14,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45742092457420924 [2022-11-25 16:43:14,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2022-11-25 16:43:14,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2022-11-25 16:43:14,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:14,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2022-11-25 16:43:14,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,793 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 44 flow. Second operand 3 states and 188 transitions. [2022-11-25 16:43:14,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 94 flow [2022-11-25 16:43:14,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:14,794 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 55 flow [2022-11-25 16:43:14,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2022-11-25 16:43:14,795 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-11-25 16:43:14,795 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 55 flow [2022-11-25 16:43:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:14,796 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:43:14,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-25 16:43:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash -880215976, now seen corresponding path program 1 times [2022-11-25 16:43:14,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:14,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515042888] [2022-11-25 16:43:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:14,820 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:43:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:14,854 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:43:14,855 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:43:14,862 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-25 16:43:14,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2022-11-25 16:43:14,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-25 16:43:14,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-25 16:43:14,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2022-11-25 16:43:14,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-25 16:43:14,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-25 16:43:14,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2022-11-25 16:43:14,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-25 16:43:14,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:43:14,867 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 16:43:14,870 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:43:14,870 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 16:43:14,901 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:43:14,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 100 transitions, 224 flow [2022-11-25 16:43:14,935 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2022-11-25 16:43:14,936 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:43:14,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 119 events. 10/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 241 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2022-11-25 16:43:14,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 100 transitions, 224 flow [2022-11-25 16:43:14,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 185 flow [2022-11-25 16:43:14,943 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:43:14,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 85 transitions, 185 flow [2022-11-25 16:43:14,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 85 transitions, 185 flow [2022-11-25 16:43:14,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 185 flow [2022-11-25 16:43:14,974 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2022-11-25 16:43:14,975 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:43:14,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 119 events. 10/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 241 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-11-25 16:43:14,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 2446 [2022-11-25 16:43:16,946 INFO L134 LiptonReduction]: Checked pairs total: 6914 [2022-11-25 16:43:16,946 INFO L136 LiptonReduction]: Total number of compositions: 64 [2022-11-25 16:43:16,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:43:16,949 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=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;@6e4f9ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:43:16,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-25 16:43:16,950 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:43:16,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:16,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:16,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:43:16,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:43:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:16,952 INFO L85 PathProgramCache]: Analyzing trace with hash 590, now seen corresponding path program 1 times [2022-11-25 16:43:16,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:16,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054017017] [2022-11-25 16:43:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:16,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054017017] [2022-11-25 16:43:16,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054017017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:16,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:16,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:43:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954798147] [2022-11-25 16:43:16,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:16,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:43:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:43:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:43:16,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 16:43:16,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 91 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:16,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:16,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 16:43:16,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:17,101 INFO L130 PetriNetUnfolder]: 440/948 cut-off events. [2022-11-25 16:43:17,102 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-25 16:43:17,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 948 events. 440/948 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5648 event pairs, 282 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 1649. Up to 638 conditions per place. [2022-11-25 16:43:17,109 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 15 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2022-11-25 16:43:17,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 105 flow [2022-11-25 16:43:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:43:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:43:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 171 transitions. [2022-11-25 16:43:17,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2022-11-25 16:43:17,111 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 171 transitions. [2022-11-25 16:43:17,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 171 transitions. [2022-11-25 16:43:17,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:17,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 171 transitions. [2022-11-25 16:43:17,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,114 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,114 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 91 flow. Second operand 2 states and 171 transitions. [2022-11-25 16:43:17,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 105 flow [2022-11-25 16:43:17,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:17,116 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 72 flow [2022-11-25 16:43:17,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-11-25 16:43:17,117 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2022-11-25 16:43:17,118 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 72 flow [2022-11-25 16:43:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:17,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:17,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:43:17,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:43:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash 18035503, now seen corresponding path program 1 times [2022-11-25 16:43:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165289790] [2022-11-25 16:43:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:17,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:17,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165289790] [2022-11-25 16:43:17,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165289790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:17,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:17,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:17,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093337824] [2022-11-25 16:43:17,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:17,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:17,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 164 [2022-11-25 16:43:17,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:17,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 164 [2022-11-25 16:43:17,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:17,300 INFO L130 PetriNetUnfolder]: 319/711 cut-off events. [2022-11-25 16:43:17,301 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-25 16:43:17,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 711 events. 319/711 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3992 event pairs, 202 based on Foata normal form. 0/652 useless extension candidates. Maximal degree in co-relation 1233. Up to 464 conditions per place. [2022-11-25 16:43:17,307 INFO L137 encePairwiseOnDemand]: 162/164 looper letters, 13 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-11-25 16:43:17,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 98 flow [2022-11-25 16:43:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2022-11-25 16:43:17,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2022-11-25 16:43:17,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2022-11-25 16:43:17,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2022-11-25 16:43:17,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:17,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2022-11-25 16:43:17,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,314 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 72 flow. Second operand 3 states and 213 transitions. [2022-11-25 16:43:17,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 98 flow [2022-11-25 16:43:17,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:43:17,317 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 72 flow [2022-11-25 16:43:17,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2022-11-25 16:43:17,319 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2022-11-25 16:43:17,320 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 72 flow [2022-11-25 16:43:17,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:17,321 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:17,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:43:17,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:43:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 18035504, now seen corresponding path program 1 times [2022-11-25 16:43:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496375329] [2022-11-25 16:43:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:17,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:17,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496375329] [2022-11-25 16:43:17,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496375329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:17,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:17,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5373246] [2022-11-25 16:43:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:17,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-11-25 16:43:17,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:17,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-11-25 16:43:17,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:17,512 INFO L130 PetriNetUnfolder]: 198/474 cut-off events. [2022-11-25 16:43:17,512 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-25 16:43:17,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 474 events. 198/474 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2399 event pairs, 122 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 824. Up to 291 conditions per place. [2022-11-25 16:43:17,516 INFO L137 encePairwiseOnDemand]: 162/164 looper letters, 12 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-11-25 16:43:17,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 96 flow [2022-11-25 16:43:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-11-25 16:43:17,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2022-11-25 16:43:17,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-11-25 16:43:17,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-11-25 16:43:17,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:17,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-11-25 16:43:17,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,522 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 72 flow. Second operand 3 states and 215 transitions. [2022-11-25 16:43:17,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 96 flow [2022-11-25 16:43:17,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:17,523 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 71 flow [2022-11-25 16:43:17,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2022-11-25 16:43:17,524 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2022-11-25 16:43:17,524 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 71 flow [2022-11-25 16:43:17,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,525 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:17,525 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:43:17,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:43:17,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:43:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash 559056047, now seen corresponding path program 1 times [2022-11-25 16:43:17,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:17,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686022530] [2022-11-25 16:43:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:17,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686022530] [2022-11-25 16:43:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686022530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:17,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:17,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467161585] [2022-11-25 16:43:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:17,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:17,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 164 [2022-11-25 16:43:17,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:17,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 164 [2022-11-25 16:43:17,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:17,821 INFO L130 PetriNetUnfolder]: 1106/1806 cut-off events. [2022-11-25 16:43:17,822 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-11-25 16:43:17,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3525 conditions, 1806 events. 1106/1806 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9909 event pairs, 272 based on Foata normal form. 0/1744 useless extension candidates. Maximal degree in co-relation 3519. Up to 1041 conditions per place. [2022-11-25 16:43:17,835 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 25 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2022-11-25 16:43:17,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 164 flow [2022-11-25 16:43:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2022-11-25 16:43:17,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2022-11-25 16:43:17,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2022-11-25 16:43:17,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2022-11-25 16:43:17,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:17,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2022-11-25 16:43:17,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,840 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 71 flow. Second operand 3 states and 224 transitions. [2022-11-25 16:43:17,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 164 flow [2022-11-25 16:43:17,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:17,842 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 116 flow [2022-11-25 16:43:17,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-11-25 16:43:17,842 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2022-11-25 16:43:17,843 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 116 flow [2022-11-25 16:43:17,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:17,843 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:43:17,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:43:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1897213648, now seen corresponding path program 1 times [2022-11-25 16:43:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567314560] [2022-11-25 16:43:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:17,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:17,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567314560] [2022-11-25 16:43:17,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567314560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:17,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:17,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887809602] [2022-11-25 16:43:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:17,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 164 [2022-11-25 16:43:17,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:17,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 164 [2022-11-25 16:43:17,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:17,988 INFO L130 PetriNetUnfolder]: 104/334 cut-off events. [2022-11-25 16:43:17,988 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-25 16:43:17,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 334 events. 104/334 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1627 event pairs, 15 based on Foata normal form. 101/432 useless extension candidates. Maximal degree in co-relation 671. Up to 121 conditions per place. [2022-11-25 16:43:17,991 INFO L137 encePairwiseOnDemand]: 158/164 looper letters, 11 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2022-11-25 16:43:17,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 154 flow [2022-11-25 16:43:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-11-25 16:43:17,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48577235772357724 [2022-11-25 16:43:17,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-11-25 16:43:17,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-11-25 16:43:17,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:17,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-11-25 16:43:17,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,996 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 116 flow. Second operand 3 states and 239 transitions. [2022-11-25 16:43:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 154 flow [2022-11-25 16:43:17,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 142 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 16:43:17,999 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 104 flow [2022-11-25 16:43:17,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2022-11-25 16:43:18,000 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2022-11-25 16:43:18,000 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 104 flow [2022-11-25 16:43:18,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:18,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:18,001 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:43:18,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-25 16:43:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1178666054, now seen corresponding path program 1 times [2022-11-25 16:43:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:18,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157267098] [2022-11-25 16:43:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:18,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:18,017 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:43:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:18,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:43:18,031 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:43:18,032 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-25 16:43:18,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2022-11-25 16:43:18,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-11-25 16:43:18,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-11-25 16:43:18,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2022-11-25 16:43:18,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2022-11-25 16:43:18,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2022-11-25 16:43:18,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2022-11-25 16:43:18,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-11-25 16:43:18,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-25 16:43:18,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:43:18,034 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-25 16:43:18,035 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:43:18,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 16:43:18,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:43:18,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 127 transitions, 296 flow [2022-11-25 16:43:18,079 INFO L130 PetriNetUnfolder]: 13/150 cut-off events. [2022-11-25 16:43:18,079 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:43:18,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 150 events. 13/150 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 337 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2022-11-25 16:43:18,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 127 transitions, 296 flow [2022-11-25 16:43:18,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 98 transitions, 220 flow [2022-11-25 16:43:18,083 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:43:18,083 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 98 transitions, 220 flow [2022-11-25 16:43:18,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 98 transitions, 220 flow [2022-11-25 16:43:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 98 transitions, 220 flow [2022-11-25 16:43:18,099 INFO L130 PetriNetUnfolder]: 13/150 cut-off events. [2022-11-25 16:43:18,100 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:43:18,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 150 events. 13/150 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 336 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-11-25 16:43:18,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 3864 [2022-11-25 16:43:20,077 INFO L134 LiptonReduction]: Checked pairs total: 11157 [2022-11-25 16:43:20,077 INFO L136 LiptonReduction]: Total number of compositions: 75 [2022-11-25 16:43:20,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:43:20,079 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;@6e4f9ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:43:20,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-25 16:43:20,080 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:43:20,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:20,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:20,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:43:20,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 818, now seen corresponding path program 1 times [2022-11-25 16:43:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:20,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396507432] [2022-11-25 16:43:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396507432] [2022-11-25 16:43:20,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396507432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:20,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:20,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:43:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255510428] [2022-11-25 16:43:20,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:20,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:43:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:43:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:43:20,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 202 [2022-11-25 16:43:20,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:20,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 202 [2022-11-25 16:43:20,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:20,515 INFO L130 PetriNetUnfolder]: 1883/3489 cut-off events. [2022-11-25 16:43:20,515 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2022-11-25 16:43:20,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 3489 events. 1883/3489 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23987 event pairs, 1218 based on Foata normal form. 0/3182 useless extension candidates. Maximal degree in co-relation 6258. Up to 2478 conditions per place. [2022-11-25 16:43:20,549 INFO L137 encePairwiseOnDemand]: 193/202 looper letters, 18 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2022-11-25 16:43:20,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 136 flow [2022-11-25 16:43:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:43:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:43:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 205 transitions. [2022-11-25 16:43:20,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5074257425742574 [2022-11-25 16:43:20,551 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 205 transitions. [2022-11-25 16:43:20,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 205 transitions. [2022-11-25 16:43:20,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:20,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 205 transitions. [2022-11-25 16:43:20,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,555 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,556 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 2 states and 205 transitions. [2022-11-25 16:43:20,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 136 flow [2022-11-25 16:43:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 129 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:20,560 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 93 flow [2022-11-25 16:43:20,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=93, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2022-11-25 16:43:20,563 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2022-11-25 16:43:20,563 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 93 flow [2022-11-25 16:43:20,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:20,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:43:20,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 25102116, now seen corresponding path program 1 times [2022-11-25 16:43:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535614603] [2022-11-25 16:43:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535614603] [2022-11-25 16:43:20,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535614603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:20,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:20,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388276006] [2022-11-25 16:43:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:20,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 202 [2022-11-25 16:43:20,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:20,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 202 [2022-11-25 16:43:20,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:20,986 INFO L130 PetriNetUnfolder]: 1365/2603 cut-off events. [2022-11-25 16:43:20,986 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2022-11-25 16:43:20,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 2603 events. 1365/2603 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17220 event pairs, 876 based on Foata normal form. 0/2422 useless extension candidates. Maximal degree in co-relation 4592. Up to 1799 conditions per place. [2022-11-25 16:43:21,012 INFO L137 encePairwiseOnDemand]: 200/202 looper letters, 16 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-11-25 16:43:21,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 125 flow [2022-11-25 16:43:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2022-11-25 16:43:21,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43564356435643564 [2022-11-25 16:43:21,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2022-11-25 16:43:21,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2022-11-25 16:43:21,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:21,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2022-11-25 16:43:21,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-11-25 16:43:21,018 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-11-25 16:43:21,018 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 93 flow. Second operand 3 states and 264 transitions. [2022-11-25 16:43:21,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 125 flow [2022-11-25 16:43:21,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:43:21,021 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 93 flow [2022-11-25 16:43:21,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2022-11-25 16:43:21,022 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2022-11-25 16:43:21,022 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 93 flow [2022-11-25 16:43:21,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:21,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:43:21,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 25102117, now seen corresponding path program 1 times [2022-11-25 16:43:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059640193] [2022-11-25 16:43:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:21,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059640193] [2022-11-25 16:43:21,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059640193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:21,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:21,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:21,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383920611] [2022-11-25 16:43:21,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:21,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:21,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:21,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 202 [2022-11-25 16:43:21,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:21,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 202 [2022-11-25 16:43:21,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:21,288 INFO L130 PetriNetUnfolder]: 847/1717 cut-off events. [2022-11-25 16:43:21,289 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2022-11-25 16:43:21,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3036 conditions, 1717 events. 847/1717 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10841 event pairs, 534 based on Foata normal form. 0/1662 useless extension candidates. Maximal degree in co-relation 3029. Up to 1121 conditions per place. [2022-11-25 16:43:21,303 INFO L137 encePairwiseOnDemand]: 200/202 looper letters, 15 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-11-25 16:43:21,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 123 flow [2022-11-25 16:43:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-25 16:43:21,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.429042904290429 [2022-11-25 16:43:21,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-25 16:43:21,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-25 16:43:21,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:21,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-25 16:43:21,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-11-25 16:43:21,308 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-11-25 16:43:21,309 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 93 flow. Second operand 3 states and 260 transitions. [2022-11-25 16:43:21,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 123 flow [2022-11-25 16:43:21,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:21,310 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 92 flow [2022-11-25 16:43:21,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2022-11-25 16:43:21,311 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2022-11-25 16:43:21,311 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 92 flow [2022-11-25 16:43:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:21,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:43:21,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:43:21,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash 778102930, now seen corresponding path program 1 times [2022-11-25 16:43:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:21,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57225318] [2022-11-25 16:43:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57225318] [2022-11-25 16:43:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57225318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:21,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:21,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569315769] [2022-11-25 16:43:21,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:21,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:21,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 202 [2022-11-25 16:43:21,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:21,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 202 [2022-11-25 16:43:21,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:22,665 INFO L130 PetriNetUnfolder]: 8028/11565 cut-off events. [2022-11-25 16:43:22,666 INFO L131 PetriNetUnfolder]: For 672/672 co-relation queries the response was YES. [2022-11-25 16:43:22,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22798 conditions, 11565 events. 8028/11565 cut-off events. For 672/672 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 69327 event pairs, 2122 based on Foata normal form. 0/11256 useless extension candidates. Maximal degree in co-relation 22791. Up to 7357 conditions per place. [2022-11-25 16:43:22,771 INFO L137 encePairwiseOnDemand]: 193/202 looper letters, 33 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2022-11-25 16:43:22,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 220 flow [2022-11-25 16:43:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2022-11-25 16:43:22,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4405940594059406 [2022-11-25 16:43:22,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2022-11-25 16:43:22,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2022-11-25 16:43:22,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:22,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2022-11-25 16:43:22,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:22,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-11-25 16:43:22,777 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-11-25 16:43:22,778 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 92 flow. Second operand 3 states and 267 transitions. [2022-11-25 16:43:22,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 220 flow [2022-11-25 16:43:22,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:22,780 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 153 flow [2022-11-25 16:43:22,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2022-11-25 16:43:22,781 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2022-11-25 16:43:22,782 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 153 flow [2022-11-25 16:43:22,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:22,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:22,782 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:22,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 16:43:22,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1933641941, now seen corresponding path program 1 times [2022-11-25 16:43:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:22,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055630702] [2022-11-25 16:43:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:22,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:22,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055630702] [2022-11-25 16:43:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055630702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:22,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:22,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79195544] [2022-11-25 16:43:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:22,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:22,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 202 [2022-11-25 16:43:22,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:22,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:22,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 202 [2022-11-25 16:43:22,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:23,128 INFO L130 PetriNetUnfolder]: 303/927 cut-off events. [2022-11-25 16:43:23,128 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2022-11-25 16:43:23,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 927 events. 303/927 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5879 event pairs, 39 based on Foata normal form. 413/1336 useless extension candidates. Maximal degree in co-relation 1863. Up to 343 conditions per place. [2022-11-25 16:43:23,135 INFO L137 encePairwiseOnDemand]: 194/202 looper letters, 13 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2022-11-25 16:43:23,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 200 flow [2022-11-25 16:43:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2022-11-25 16:43:23,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4768976897689769 [2022-11-25 16:43:23,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2022-11-25 16:43:23,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2022-11-25 16:43:23,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:23,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2022-11-25 16:43:23,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-11-25 16:43:23,142 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-11-25 16:43:23,142 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 153 flow. Second operand 3 states and 289 transitions. [2022-11-25 16:43:23,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 200 flow [2022-11-25 16:43:23,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 184 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 16:43:23,148 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 135 flow [2022-11-25 16:43:23,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2022-11-25 16:43:23,150 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2022-11-25 16:43:23,150 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 135 flow [2022-11-25 16:43:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:23,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:23,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 16:43:23,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:23,153 INFO L85 PathProgramCache]: Analyzing trace with hash 483103132, now seen corresponding path program 1 times [2022-11-25 16:43:23,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:23,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898831859] [2022-11-25 16:43:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:23,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:23,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:23,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898831859] [2022-11-25 16:43:23,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898831859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:23,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:23,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913843946] [2022-11-25 16:43:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:23,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:43:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:43:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:23,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 202 [2022-11-25 16:43:23,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:23,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 202 [2022-11-25 16:43:23,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:23,779 INFO L130 PetriNetUnfolder]: 794/1797 cut-off events. [2022-11-25 16:43:23,779 INFO L131 PetriNetUnfolder]: For 657/657 co-relation queries the response was YES. [2022-11-25 16:43:23,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 1797 events. 794/1797 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12921 event pairs, 41 based on Foata normal form. 0/1772 useless extension candidates. Maximal degree in co-relation 4613. Up to 1016 conditions per place. [2022-11-25 16:43:23,790 INFO L137 encePairwiseOnDemand]: 191/202 looper letters, 57 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2022-11-25 16:43:23,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 457 flow [2022-11-25 16:43:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:43:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:43:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 492 transitions. [2022-11-25 16:43:23,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40594059405940597 [2022-11-25 16:43:23,793 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 492 transitions. [2022-11-25 16:43:23,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 492 transitions. [2022-11-25 16:43:23,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:23,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 492 transitions. [2022-11-25 16:43:23,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 202.0) internal successors, (1414), 7 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 202.0) internal successors, (1414), 7 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,801 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 135 flow. Second operand 6 states and 492 transitions. [2022-11-25 16:43:23,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 457 flow [2022-11-25 16:43:23,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:23,805 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 254 flow [2022-11-25 16:43:23,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2022-11-25 16:43:23,806 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2022-11-25 16:43:23,806 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 254 flow [2022-11-25 16:43:23,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:23,807 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 16:43:23,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:43:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1415389755, now seen corresponding path program 1 times [2022-11-25 16:43:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840354044] [2022-11-25 16:43:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:23,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:23,825 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:43:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:23,850 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:43:23,850 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:43:23,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2022-11-25 16:43:23,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2022-11-25 16:43:23,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-11-25 16:43:23,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-11-25 16:43:23,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2022-11-25 16:43:23,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-11-25 16:43:23,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-11-25 16:43:23,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 11 remaining) [2022-11-25 16:43:23,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2022-11-25 16:43:23,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2022-11-25 16:43:23,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-11-25 16:43:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 16:43:23,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:23,855 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:43:23,855 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 16:43:23,900 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:43:23,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 372 flow [2022-11-25 16:43:23,926 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2022-11-25 16:43:23,926 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 16:43:23,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 181 events. 16/181 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 418 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 201. Up to 10 conditions per place. [2022-11-25 16:43:23,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 154 transitions, 372 flow [2022-11-25 16:43:23,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 111 transitions, 257 flow [2022-11-25 16:43:23,930 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:43:23,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 111 transitions, 257 flow [2022-11-25 16:43:23,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 111 transitions, 257 flow [2022-11-25 16:43:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 111 transitions, 257 flow [2022-11-25 16:43:23,949 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2022-11-25 16:43:23,949 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 16:43:23,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 181 events. 16/181 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 418 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 174. Up to 10 conditions per place. [2022-11-25 16:43:23,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 5594 [2022-11-25 16:43:26,000 INFO L134 LiptonReduction]: Checked pairs total: 17311 [2022-11-25 16:43:26,001 INFO L136 LiptonReduction]: Total number of compositions: 80 [2022-11-25 16:43:26,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:43:26,005 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;@6e4f9ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:43:26,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 16:43:26,005 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:43:26,005 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:26,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:26,006 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:43:26,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1080, now seen corresponding path program 1 times [2022-11-25 16:43:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:26,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474027001] [2022-11-25 16:43:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:26,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474027001] [2022-11-25 16:43:26,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474027001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:26,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:26,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:43:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304621684] [2022-11-25 16:43:26,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:26,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:43:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:43:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:43:26,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-11-25 16:43:26,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 147 flow. Second operand has 2 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:26,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:26,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-11-25 16:43:26,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:27,488 INFO L130 PetriNetUnfolder]: 7388/12312 cut-off events. [2022-11-25 16:43:27,488 INFO L131 PetriNetUnfolder]: For 1796/1796 co-relation queries the response was YES. [2022-11-25 16:43:27,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22650 conditions, 12312 events. 7388/12312 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 91268 event pairs, 4806 based on Foata normal form. 0/11396 useless extension candidates. Maximal degree in co-relation 22637. Up to 9170 conditions per place. [2022-11-25 16:43:27,604 INFO L137 encePairwiseOnDemand]: 224/234 looper letters, 21 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2022-11-25 16:43:27,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 169 flow [2022-11-25 16:43:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:43:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:43:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 239 transitions. [2022-11-25 16:43:27,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5106837606837606 [2022-11-25 16:43:27,606 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 239 transitions. [2022-11-25 16:43:27,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 239 transitions. [2022-11-25 16:43:27,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:27,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 239 transitions. [2022-11-25 16:43:27,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,609 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,609 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 147 flow. Second operand 2 states and 239 transitions. [2022-11-25 16:43:27,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 169 flow [2022-11-25 16:43:27,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 156 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:27,614 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 114 flow [2022-11-25 16:43:27,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2022-11-25 16:43:27,614 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2022-11-25 16:43:27,615 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 114 flow [2022-11-25 16:43:27,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:27,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:27,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 16:43:27,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash 33070401, now seen corresponding path program 1 times [2022-11-25 16:43:27,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120587824] [2022-11-25 16:43:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:27,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120587824] [2022-11-25 16:43:27,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120587824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:27,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:27,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686845157] [2022-11-25 16:43:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:27,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:27,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 234 [2022-11-25 16:43:27,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:27,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 234 [2022-11-25 16:43:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:28,712 INFO L130 PetriNetUnfolder]: 5359/9159 cut-off events. [2022-11-25 16:43:28,712 INFO L131 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2022-11-25 16:43:28,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16408 conditions, 9159 events. 5359/9159 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66770 event pairs, 3466 based on Foata normal form. 0/8620 useless extension candidates. Maximal degree in co-relation 16401. Up to 6656 conditions per place. [2022-11-25 16:43:28,784 INFO L137 encePairwiseOnDemand]: 232/234 looper letters, 19 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 16:43:28,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 152 flow [2022-11-25 16:43:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2022-11-25 16:43:28,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44017094017094016 [2022-11-25 16:43:28,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2022-11-25 16:43:28,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2022-11-25 16:43:28,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:28,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2022-11-25 16:43:28,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:28,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:28,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:28,793 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 114 flow. Second operand 3 states and 309 transitions. [2022-11-25 16:43:28,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 152 flow [2022-11-25 16:43:28,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:43:28,801 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 114 flow [2022-11-25 16:43:28,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 16:43:28,801 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2022-11-25 16:43:28,802 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 114 flow [2022-11-25 16:43:28,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:28,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:28,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:28,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 16:43:28,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:28,803 INFO L85 PathProgramCache]: Analyzing trace with hash 33070402, now seen corresponding path program 1 times [2022-11-25 16:43:28,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969580810] [2022-11-25 16:43:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:28,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:28,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969580810] [2022-11-25 16:43:28,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969580810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:28,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:28,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607887784] [2022-11-25 16:43:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:28,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 234 [2022-11-25 16:43:28,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:28,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:28,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 234 [2022-11-25 16:43:28,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:29,743 INFO L130 PetriNetUnfolder]: 3330/6006 cut-off events. [2022-11-25 16:43:29,743 INFO L131 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2022-11-25 16:43:29,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 6006 events. 3330/6006 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 42705 event pairs, 2126 based on Foata normal form. 0/5844 useless extension candidates. Maximal degree in co-relation 10736. Up to 4143 conditions per place. [2022-11-25 16:43:29,811 INFO L137 encePairwiseOnDemand]: 232/234 looper letters, 18 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 16:43:29,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 150 flow [2022-11-25 16:43:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2022-11-25 16:43:29,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.443019943019943 [2022-11-25 16:43:29,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2022-11-25 16:43:29,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2022-11-25 16:43:29,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:29,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2022-11-25 16:43:29,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:29,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:29,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:29,819 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 3 states and 311 transitions. [2022-11-25 16:43:29,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 150 flow [2022-11-25 16:43:29,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:29,821 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 113 flow [2022-11-25 16:43:29,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-11-25 16:43:29,822 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2022-11-25 16:43:29,822 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 113 flow [2022-11-25 16:43:29,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:29,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:29,823 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:43:29,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 16:43:29,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1025114369, now seen corresponding path program 1 times [2022-11-25 16:43:29,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199832906] [2022-11-25 16:43:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199832906] [2022-11-25 16:43:29,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199832906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:29,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:29,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459276005] [2022-11-25 16:43:29,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:29,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:29,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:29,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 234 [2022-11-25 16:43:29,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:29,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:29,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 234 [2022-11-25 16:43:29,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:36,728 INFO L130 PetriNetUnfolder]: 52253/69823 cut-off events. [2022-11-25 16:43:36,728 INFO L131 PetriNetUnfolder]: For 3521/3521 co-relation queries the response was YES. [2022-11-25 16:43:36,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138241 conditions, 69823 events. 52253/69823 cut-off events. For 3521/3521 co-relation queries the response was YES. Maximal size of possible extension queue 2252. Compared 436641 event pairs, 15211 based on Foata normal form. 0/68265 useless extension candidates. Maximal degree in co-relation 138233. Up to 46663 conditions per place. [2022-11-25 16:43:37,347 INFO L137 encePairwiseOnDemand]: 223/234 looper letters, 41 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2022-11-25 16:43:37,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 276 flow [2022-11-25 16:43:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-11-25 16:43:37,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4415954415954416 [2022-11-25 16:43:37,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-11-25 16:43:37,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-11-25 16:43:37,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:37,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-11-25 16:43:37,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,354 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 113 flow. Second operand 3 states and 310 transitions. [2022-11-25 16:43:37,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 276 flow [2022-11-25 16:43:37,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:37,356 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 190 flow [2022-11-25 16:43:37,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2022-11-25 16:43:37,357 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2022-11-25 16:43:37,357 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 190 flow [2022-11-25 16:43:37,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:37,358 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 16:43:37,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -882761147, now seen corresponding path program 1 times [2022-11-25 16:43:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736909406] [2022-11-25 16:43:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736909406] [2022-11-25 16:43:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736909406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:37,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:37,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168523956] [2022-11-25 16:43:37,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:37,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 234 [2022-11-25 16:43:37,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:37,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 234 [2022-11-25 16:43:37,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:37,900 INFO L130 PetriNetUnfolder]: 794/2336 cut-off events. [2022-11-25 16:43:37,900 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2022-11-25 16:43:37,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2336 events. 794/2336 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17828 event pairs, 99 based on Foata normal form. 1373/3688 useless extension candidates. Maximal degree in co-relation 4690. Up to 881 conditions per place. [2022-11-25 16:43:37,914 INFO L137 encePairwiseOnDemand]: 224/234 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2022-11-25 16:43:37,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 246 flow [2022-11-25 16:43:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2022-11-25 16:43:37,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2022-11-25 16:43:37,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2022-11-25 16:43:37,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2022-11-25 16:43:37,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:37,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2022-11-25 16:43:37,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,921 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 190 flow. Second operand 3 states and 339 transitions. [2022-11-25 16:43:37,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 246 flow [2022-11-25 16:43:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 226 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 16:43:37,925 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 166 flow [2022-11-25 16:43:37,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2022-11-25 16:43:37,928 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2022-11-25 16:43:37,928 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 166 flow [2022-11-25 16:43:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:37,934 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:37,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 16:43:37,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1003138929, now seen corresponding path program 1 times [2022-11-25 16:43:37,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:37,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502352131] [2022-11-25 16:43:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:38,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:38,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502352131] [2022-11-25 16:43:38,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502352131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:38,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:38,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712265432] [2022-11-25 16:43:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:38,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:43:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:43:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:38,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 234 [2022-11-25 16:43:38,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:38,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 234 [2022-11-25 16:43:38,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:38,771 INFO L130 PetriNetUnfolder]: 1997/4329 cut-off events. [2022-11-25 16:43:38,771 INFO L131 PetriNetUnfolder]: For 1660/1661 co-relation queries the response was YES. [2022-11-25 16:43:38,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11237 conditions, 4329 events. 1997/4329 cut-off events. For 1660/1661 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 35035 event pairs, 65 based on Foata normal form. 0/4275 useless extension candidates. Maximal degree in co-relation 11228. Up to 2808 conditions per place. [2022-11-25 16:43:38,813 INFO L137 encePairwiseOnDemand]: 220/234 looper letters, 71 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2022-11-25 16:43:38,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 104 transitions, 582 flow [2022-11-25 16:43:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:43:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:43:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 569 transitions. [2022-11-25 16:43:38,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40527065527065526 [2022-11-25 16:43:38,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 569 transitions. [2022-11-25 16:43:38,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 569 transitions. [2022-11-25 16:43:38,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:38,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 569 transitions. [2022-11-25 16:43:38,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.83333333333333) internal successors, (569), 6 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,843 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,843 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 166 flow. Second operand 6 states and 569 transitions. [2022-11-25 16:43:38,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 104 transitions, 582 flow [2022-11-25 16:43:38,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:38,849 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 324 flow [2022-11-25 16:43:38,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2022-11-25 16:43:38,850 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2022-11-25 16:43:38,850 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 324 flow [2022-11-25 16:43:38,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:38,851 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:38,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 16:43:38,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1508389202, now seen corresponding path program 2 times [2022-11-25 16:43:38,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:38,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997241695] [2022-11-25 16:43:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997241695] [2022-11-25 16:43:39,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997241695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227933687] [2022-11-25 16:43:39,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:43:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:39,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:39,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:43:39,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:43:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:43:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:39,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:39,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227933687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:39,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:39,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 16:43:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388072448] [2022-11-25 16:43:39,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:39,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:43:39,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:43:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:43:40,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 234 [2022-11-25 16:43:40,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 324 flow. Second operand has 20 states, 20 states have (on average 82.85) internal successors, (1657), 20 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:40,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:40,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 234 [2022-11-25 16:43:40,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:41,854 INFO L130 PetriNetUnfolder]: 3472/6945 cut-off events. [2022-11-25 16:43:41,854 INFO L131 PetriNetUnfolder]: For 3051/3051 co-relation queries the response was YES. [2022-11-25 16:43:41,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19035 conditions, 6945 events. 3472/6945 cut-off events. For 3051/3051 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 59540 event pairs, 51 based on Foata normal form. 40/6982 useless extension candidates. Maximal degree in co-relation 19022. Up to 3249 conditions per place. [2022-11-25 16:43:41,908 INFO L137 encePairwiseOnDemand]: 216/234 looper letters, 104 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2022-11-25 16:43:41,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 159 transitions, 1011 flow [2022-11-25 16:43:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:43:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:43:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1018 transitions. [2022-11-25 16:43:41,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3954933954933955 [2022-11-25 16:43:41,914 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1018 transitions. [2022-11-25 16:43:41,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1018 transitions. [2022-11-25 16:43:41,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:41,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1018 transitions. [2022-11-25 16:43:41,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 92.54545454545455) internal successors, (1018), 11 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:41,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:41,925 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:41,925 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 324 flow. Second operand 11 states and 1018 transitions. [2022-11-25 16:43:41,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 159 transitions, 1011 flow [2022-11-25 16:43:41,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 159 transitions, 1011 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:43:41,937 INFO L231 Difference]: Finished difference. Result has 79 places, 93 transitions, 605 flow [2022-11-25 16:43:41,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=605, PETRI_PLACES=79, PETRI_TRANSITIONS=93} [2022-11-25 16:43:41,938 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2022-11-25 16:43:41,938 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 93 transitions, 605 flow [2022-11-25 16:43:41,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 82.85) internal successors, (1657), 20 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:41,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:41,939 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:41,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:42,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e9a913-4059-419a-a5b7-b47e54f597a2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:42,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 16:43:42,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:42,147 INFO L85 PathProgramCache]: Analyzing trace with hash -235842237, now seen corresponding path program 1 times [2022-11-25 16:43:42,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:42,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925210596] [2022-11-25 16:43:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:42,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:42,164 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:43:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:43:42,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:43:42,180 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:43:42,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2022-11-25 16:43:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 12 remaining) [2022-11-25 16:43:42,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2022-11-25 16:43:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2022-11-25 16:43:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 12 remaining) [2022-11-25 16:43:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2022-11-25 16:43:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2022-11-25 16:43:42,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 12 remaining) [2022-11-25 16:43:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2022-11-25 16:43:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2022-11-25 16:43:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 12 remaining) [2022-11-25 16:43:42,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 12 remaining) [2022-11-25 16:43:42,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 16:43:42,183 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:42,183 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:43:42,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-25 16:43:42,222 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:43:42,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 181 transitions, 452 flow [2022-11-25 16:43:42,247 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-11-25 16:43:42,247 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 16:43:42,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 212 events. 19/212 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 515 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 239. Up to 12 conditions per place. [2022-11-25 16:43:42,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 181 transitions, 452 flow [2022-11-25 16:43:42,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 124 transitions, 296 flow [2022-11-25 16:43:42,251 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:43:42,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 124 transitions, 296 flow [2022-11-25 16:43:42,252 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 124 transitions, 296 flow [2022-11-25 16:43:42,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 124 transitions, 296 flow [2022-11-25 16:43:42,273 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-11-25 16:43:42,274 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 16:43:42,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 212 events. 19/212 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 515 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 212. Up to 12 conditions per place. [2022-11-25 16:43:42,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 7636 [2022-11-25 16:43:44,928 INFO L134 LiptonReduction]: Checked pairs total: 25278 [2022-11-25 16:43:44,929 INFO L136 LiptonReduction]: Total number of compositions: 85 [2022-11-25 16:43:44,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:43:44,931 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;@6e4f9ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:43:44,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-25 16:43:44,932 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:43:44,932 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:43:44,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:44,933 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:43:44,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 16:43:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1371, now seen corresponding path program 1 times [2022-11-25 16:43:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:44,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346284658] [2022-11-25 16:43:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:44,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:44,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346284658] [2022-11-25 16:43:44,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346284658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:44,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:43:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749648177] [2022-11-25 16:43:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:43:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:43:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:43:44,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 266 [2022-11-25 16:43:44,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:44,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:44,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 266 [2022-11-25 16:43:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:49,059 INFO L130 PetriNetUnfolder]: 27479/42333 cut-off events. [2022-11-25 16:43:49,059 INFO L131 PetriNetUnfolder]: For 8710/8710 co-relation queries the response was YES. [2022-11-25 16:43:49,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79460 conditions, 42333 events. 27479/42333 cut-off events. For 8710/8710 co-relation queries the response was YES. Maximal size of possible extension queue 1682. Compared 329118 event pairs, 17958 based on Foata normal form. 0/39578 useless extension candidates. Maximal degree in co-relation 79446. Up to 32826 conditions per place. [2022-11-25 16:43:49,428 INFO L137 encePairwiseOnDemand]: 255/266 looper letters, 24 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2022-11-25 16:43:49,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 204 flow [2022-11-25 16:43:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:43:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 16:43:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-11-25 16:43:49,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2022-11-25 16:43:49,431 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-11-25 16:43:49,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-11-25 16:43:49,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:49,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-11-25 16:43:49,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:49,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:49,437 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:49,437 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 178 flow. Second operand 2 states and 273 transitions. [2022-11-25 16:43:49,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 204 flow [2022-11-25 16:43:49,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 183 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:49,449 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 135 flow [2022-11-25 16:43:49,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=135, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2022-11-25 16:43:49,451 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -10 predicate places. [2022-11-25 16:43:49,451 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 135 flow [2022-11-25 16:43:49,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:49,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:49,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:49,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 16:43:49,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 16:43:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash 42113019, now seen corresponding path program 1 times [2022-11-25 16:43:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:49,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901241755] [2022-11-25 16:43:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:49,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:49,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901241755] [2022-11-25 16:43:49,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901241755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:49,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:49,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:49,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720035975] [2022-11-25 16:43:49,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:49,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:49,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:49,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 266 [2022-11-25 16:43:49,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:49,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:49,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 266 [2022-11-25 16:43:49,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:52,701 INFO L130 PetriNetUnfolder]: 19941/31403 cut-off events. [2022-11-25 16:43:52,701 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2022-11-25 16:43:52,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57016 conditions, 31403 events. 19941/31403 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 241626 event pairs, 12972 based on Foata normal form. 0/29782 useless extension candidates. Maximal degree in co-relation 57008. Up to 23831 conditions per place. [2022-11-25 16:43:52,977 INFO L137 encePairwiseOnDemand]: 264/266 looper letters, 22 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-25 16:43:52,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 179 flow [2022-11-25 16:43:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2022-11-25 16:43:52,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2022-11-25 16:43:52,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2022-11-25 16:43:52,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2022-11-25 16:43:52,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:52,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2022-11-25 16:43:52,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:52,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:52,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:52,986 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 135 flow. Second operand 3 states and 366 transitions. [2022-11-25 16:43:52,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 179 flow [2022-11-25 16:43:52,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:43:52,988 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 135 flow [2022-11-25 16:43:52,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2022-11-25 16:43:52,989 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2022-11-25 16:43:52,989 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 135 flow [2022-11-25 16:43:52,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:52,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:52,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 16:43:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 16:43:52,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 16:43:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash 42113021, now seen corresponding path program 1 times [2022-11-25 16:43:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986340323] [2022-11-25 16:43:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986340323] [2022-11-25 16:43:53,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986340323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:53,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:53,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099948419] [2022-11-25 16:43:53,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:53,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:53,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:53,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 266 [2022-11-25 16:43:53,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:53,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:53,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 266 [2022-11-25 16:43:53,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:55,379 INFO L130 PetriNetUnfolder]: 12403/20473 cut-off events. [2022-11-25 16:43:55,379 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2022-11-25 16:43:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37094 conditions, 20473 events. 12403/20473 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 157577 event pairs, 7986 based on Foata normal form. 0/19986 useless extension candidates. Maximal degree in co-relation 37085. Up to 14837 conditions per place. [2022-11-25 16:43:55,536 INFO L137 encePairwiseOnDemand]: 264/266 looper letters, 21 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-11-25 16:43:55,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 177 flow [2022-11-25 16:43:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:43:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2022-11-25 16:43:55,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44611528822055135 [2022-11-25 16:43:55,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2022-11-25 16:43:55,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2022-11-25 16:43:55,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:55,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2022-11-25 16:43:55,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:55,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:55,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:55,543 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 135 flow. Second operand 3 states and 356 transitions. [2022-11-25 16:43:55,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 177 flow [2022-11-25 16:43:55,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:43:55,546 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 134 flow [2022-11-25 16:43:55,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2022-11-25 16:43:55,547 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2022-11-25 16:43:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 134 flow [2022-11-25 16:43:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:55,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:55,547 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 16:43:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 16:43:55,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 16:43:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1305408663, now seen corresponding path program 1 times [2022-11-25 16:43:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211844232] [2022-11-25 16:43:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211844232] [2022-11-25 16:43:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211844232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:55,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:55,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:43:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499189190] [2022-11-25 16:43:55,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:55,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:55,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 266 [2022-11-25 16:43:55,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:55,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:55,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 266 [2022-11-25 16:43:55,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand