./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:50:38,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:50:38,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:50:38,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:50:38,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:50:38,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:50:38,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:50:38,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:50:38,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:50:38,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:50:38,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:50:38,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:50:38,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:50:38,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:50:38,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:50:38,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:50:38,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:50:38,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:50:38,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:50:38,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:50:38,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:50:38,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:50:38,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:50:38,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:50:38,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:50:38,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:50:38,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:50:38,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:50:38,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:50:38,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:50:38,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:50:38,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:50:38,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:50:38,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:50:38,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:50:38,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:50:38,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:50:38,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:50:38,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:50:38,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:50:38,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:50:38,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:50:38,499 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:50:38,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:50:38,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:50:38,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:50:38,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:50:38,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:50:38,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:50:38,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:50:38,501 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:50:38,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:50:38,501 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:50:38,501 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:50:38,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:50:38,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:50:38,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:50:38,502 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:50:38,502 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:50:38,502 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:50:38,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:50:38,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:50:38,503 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:50:38,503 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:50:38,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:50:38,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:50:38,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:50:38,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:50:38,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:50:38,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:50:38,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:50:38,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:50:38,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:50:38,505 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:50:38,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:50:38,505 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:50:38,505 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_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2022-12-13 13:50:38,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:50:38,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:50:38,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:50:38,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:50:38,709 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:50:38,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2022-12-13 13:50:41,240 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:50:41,431 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:50:41,432 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2022-12-13 13:50:41,441 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/data/12344bc87/c72fc3770a984b5fb54a89b03e4fdd9a/FLAGc04470d87 [2022-12-13 13:50:41,795 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/data/12344bc87/c72fc3770a984b5fb54a89b03e4fdd9a [2022-12-13 13:50:41,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:50:41,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:50:41,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:50:41,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:50:41,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:50:41,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:50:41" (1/1) ... [2022-12-13 13:50:41,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a0d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:41, skipping insertion in model container [2022-12-13 13:50:41,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:50:41" (1/1) ... [2022-12-13 13:50:41,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:50:41,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:50:42,019 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_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2022-12-13 13:50:42,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:50:42,042 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:50:42,063 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_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2022-12-13 13:50:42,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:50:42,090 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:50:42,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42 WrapperNode [2022-12-13 13:50:42,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:50:42,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:50:42,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:50:42,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:50:42,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,120 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-12-13 13:50:42,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:50:42,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:50:42,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:50:42,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:50:42,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,138 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:50:42,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:50:42,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:50:42,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:50:42,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (1/1) ... [2022-12-13 13:50:42,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:50:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:50:42,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:50:42,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:50:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:50:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:50:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:50:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:50:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:50:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 13:50:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 13:50:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:50:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:50:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:50:42,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:50:42,196 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:50:42,296 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:50:42,297 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:50:42,473 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:50:42,478 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:50:42,478 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 13:50:42,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:50:42 BoogieIcfgContainer [2022-12-13 13:50:42,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:50:42,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:50:42,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:50:42,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:50:42,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:50:41" (1/3) ... [2022-12-13 13:50:42,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6399b527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:50:42, skipping insertion in model container [2022-12-13 13:50:42,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:50:42" (2/3) ... [2022-12-13 13:50:42,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6399b527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:50:42, skipping insertion in model container [2022-12-13 13:50:42,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:50:42" (3/3) ... [2022-12-13 13:50:42,487 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2022-12-13 13:50:42,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:50:42,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 13:50:42,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:50:42,540 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 13:50:42,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 122 transitions, 252 flow [2022-12-13 13:50:42,624 INFO L130 PetriNetUnfolder]: 17/165 cut-off events. [2022-12-13 13:50:42,624 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:50:42,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 165 events. 17/165 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 406 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-12-13 13:50:42,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 122 transitions, 252 flow [2022-12-13 13:50:42,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 122 transitions, 252 flow [2022-12-13 13:50:42,640 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:50:42,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 122 transitions, 252 flow [2022-12-13 13:50:42,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 122 transitions, 252 flow [2022-12-13 13:50:42,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 122 transitions, 252 flow [2022-12-13 13:50:42,689 INFO L130 PetriNetUnfolder]: 17/165 cut-off events. [2022-12-13 13:50:42,689 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:50:42,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 165 events. 17/165 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 406 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-12-13 13:50:42,693 INFO L119 LiptonReduction]: Number of co-enabled transitions 2744 [2022-12-13 13:50:45,088 INFO L134 LiptonReduction]: Checked pairs total: 4876 [2022-12-13 13:50:45,088 INFO L136 LiptonReduction]: Total number of compositions: 110 [2022-12-13 13:50:45,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:50:45,102 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;@7117a882, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:50:45,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:50:45,104 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 13:50:45,104 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:50:45,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:45,104 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:50:45,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash 14885, now seen corresponding path program 1 times [2022-12-13 13:50:45,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:45,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392888043] [2022-12-13 13:50:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:45,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:45,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392888043] [2022-12-13 13:50:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392888043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:50:45,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:50:45,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:50:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872834100] [2022-12-13 13:50:45,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:50:45,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:50:45,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:50:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:50:45,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 232 [2022-12-13 13:50:45,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 37 transitions, 82 flow. Second operand has 3 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) [2022-12-13 13:50:45,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:45,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 232 [2022-12-13 13:50:45,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:45,444 INFO L130 PetriNetUnfolder]: 120/277 cut-off events. [2022-12-13 13:50:45,444 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:50:45,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 277 events. 120/277 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1036 event pairs, 98 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 527. Up to 263 conditions per place. [2022-12-13 13:50:45,446 INFO L137 encePairwiseOnDemand]: 220/232 looper letters, 34 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2022-12-13 13:50:45,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 160 flow [2022-12-13 13:50:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:50:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:50:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2022-12-13 13:50:45,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5201149425287356 [2022-12-13 13:50:45,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2022-12-13 13:50:45,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2022-12-13 13:50:45,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:45,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2022-12-13 13:50:45,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,466 INFO L175 Difference]: Start difference. First operand has 31 places, 37 transitions, 82 flow. Second operand 3 states and 362 transitions. [2022-12-13 13:50:45,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 160 flow [2022-12-13 13:50:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:50:45,469 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 74 flow [2022-12-13 13:50:45,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2022-12-13 13:50:45,473 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2022-12-13 13:50:45,473 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 74 flow [2022-12-13 13:50:45,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-12-13 13:50:45,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:45,474 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:50:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:50:45,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 14884, now seen corresponding path program 1 times [2022-12-13 13:50:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:45,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396742776] [2022-12-13 13:50:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:45,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396742776] [2022-12-13 13:50:45,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396742776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:50:45,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:50:45,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:50:45,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347809124] [2022-12-13 13:50:45,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:50:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:50:45,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:50:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:50:45,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 232 [2022-12-13 13:50:45,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:45,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 232 [2022-12-13 13:50:45,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:45,594 INFO L130 PetriNetUnfolder]: 96/224 cut-off events. [2022-12-13 13:50:45,595 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 13:50:45,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 224 events. 96/224 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 776 event pairs, 88 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 463. Up to 202 conditions per place. [2022-12-13 13:50:45,597 INFO L137 encePairwiseOnDemand]: 228/232 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-12-13 13:50:45,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 150 flow [2022-12-13 13:50:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:50:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:50:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2022-12-13 13:50:45,600 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47988505747126436 [2022-12-13 13:50:45,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2022-12-13 13:50:45,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2022-12-13 13:50:45,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:45,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2022-12-13 13:50:45,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,603 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 74 flow. Second operand 3 states and 334 transitions. [2022-12-13 13:50:45,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 150 flow [2022-12-13 13:50:45,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:50:45,604 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 70 flow [2022-12-13 13:50:45,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 13:50:45,604 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-12-13 13:50:45,605 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 70 flow [2022-12-13 13:50:45,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:45,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:50:45,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:50:45,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash 443794517, now seen corresponding path program 1 times [2022-12-13 13:50:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:45,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150924624] [2022-12-13 13:50:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:45,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:45,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:45,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150924624] [2022-12-13 13:50:45,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150924624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:50:45,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876431793] [2022-12-13 13:50:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:45,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:50:45,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:50:45,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:50:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:50:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:45,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:50:45,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:50:45,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:50:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:45,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:50:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:45,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876431793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:50:45,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:50:45,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 13:50:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610107258] [2022-12-13 13:50:45,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:50:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:50:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:50:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:50:45,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 232 [2022-12-13 13:50:45,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:45,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:45,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 232 [2022-12-13 13:50:45,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:46,033 INFO L130 PetriNetUnfolder]: 16/55 cut-off events. [2022-12-13 13:50:46,033 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:50:46,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 55 events. 16/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 133 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 118. Up to 34 conditions per place. [2022-12-13 13:50:46,034 INFO L137 encePairwiseOnDemand]: 228/232 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-13 13:50:46,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 97 flow [2022-12-13 13:50:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:50:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:50:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2022-12-13 13:50:46,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4515086206896552 [2022-12-13 13:50:46,036 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2022-12-13 13:50:46,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2022-12-13 13:50:46,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:46,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2022-12-13 13:50:46,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:46,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:46,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:46,041 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 4 states and 419 transitions. [2022-12-13 13:50:46,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 97 flow [2022-12-13 13:50:46,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:50:46,042 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 38 flow [2022-12-13 13:50:46,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2022-12-13 13:50:46,042 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -10 predicate places. [2022-12-13 13:50:46,042 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 38 flow [2022-12-13 13:50:46,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:46,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:46,043 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 13:50:46,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:50:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:50:46,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash 872728494, now seen corresponding path program 1 times [2022-12-13 13:50:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:46,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863182838] [2022-12-13 13:50:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:46,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:50:46,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:50:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:50:46,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:50:46,331 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:50:46,334 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 13:50:46,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 13:50:46,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 13:50:46,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 13:50:46,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 13:50:46,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 13:50:46,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 13:50:46,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:50:46,343 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 13:50:46,349 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:50:46,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 13:50:46,391 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:50:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2022-12-13 13:50:46,419 INFO L130 PetriNetUnfolder]: 31/268 cut-off events. [2022-12-13 13:50:46,419 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:50:46,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 268 events. 31/268 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 804 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2022-12-13 13:50:46,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 152 transitions, 322 flow [2022-12-13 13:50:46,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 152 transitions, 322 flow [2022-12-13 13:50:46,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:50:46,422 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 152 transitions, 322 flow [2022-12-13 13:50:46,422 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 152 transitions, 322 flow [2022-12-13 13:50:46,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2022-12-13 13:50:46,440 INFO L130 PetriNetUnfolder]: 31/268 cut-off events. [2022-12-13 13:50:46,440 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:50:46,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 268 events. 31/268 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 804 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2022-12-13 13:50:46,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 7672 [2022-12-13 13:50:48,502 INFO L134 LiptonReduction]: Checked pairs total: 17676 [2022-12-13 13:50:48,502 INFO L136 LiptonReduction]: Total number of compositions: 119 [2022-12-13 13:50:48,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:50:48,504 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;@7117a882, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:50:48,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:50:48,505 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 13:50:48,506 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:50:48,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:48,506 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:50:48,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:48,506 INFO L85 PathProgramCache]: Analyzing trace with hash 24507, now seen corresponding path program 1 times [2022-12-13 13:50:48,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:48,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108031260] [2022-12-13 13:50:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:48,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:48,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:48,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108031260] [2022-12-13 13:50:48,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108031260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:50:48,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:50:48,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:50:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742991046] [2022-12-13 13:50:48,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:50:48,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:50:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:50:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:50:48,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 271 [2022-12-13 13:50:48,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:48,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:48,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 271 [2022-12-13 13:50:48,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:48,843 INFO L130 PetriNetUnfolder]: 1864/3311 cut-off events. [2022-12-13 13:50:48,843 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-12-13 13:50:48,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6434 conditions, 3311 events. 1864/3311 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20898 event pairs, 896 based on Foata normal form. 665/3354 useless extension candidates. Maximal degree in co-relation 855. Up to 3055 conditions per place. [2022-12-13 13:50:48,854 INFO L137 encePairwiseOnDemand]: 253/271 looper letters, 41 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2022-12-13 13:50:48,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 216 flow [2022-12-13 13:50:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:50:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:50:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-12-13 13:50:48,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5424354243542435 [2022-12-13 13:50:48,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-12-13 13:50:48,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-12-13 13:50:48,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:48,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-12-13 13:50:48,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:48,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:48,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:48,863 INFO L175 Difference]: Start difference. First operand has 49 places, 60 transitions, 138 flow. Second operand 3 states and 441 transitions. [2022-12-13 13:50:48,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 216 flow [2022-12-13 13:50:48,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:50:48,864 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 122 flow [2022-12-13 13:50:48,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2022-12-13 13:50:48,865 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-12-13 13:50:48,865 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 122 flow [2022-12-13 13:50:48,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:48,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:48,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:50:48,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:50:48,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 24508, now seen corresponding path program 1 times [2022-12-13 13:50:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:48,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586129229] [2022-12-13 13:50:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:48,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586129229] [2022-12-13 13:50:48,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586129229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:50:48,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:50:48,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:50:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326532623] [2022-12-13 13:50:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:50:48,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:50:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:50:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:50:48,908 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 271 [2022-12-13 13:50:48,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:48,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:48,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 271 [2022-12-13 13:50:48,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:49,171 INFO L130 PetriNetUnfolder]: 1500/2704 cut-off events. [2022-12-13 13:50:49,171 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-12-13 13:50:49,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 2704 events. 1500/2704 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16359 event pairs, 1368 based on Foata normal form. 0/2357 useless extension candidates. Maximal degree in co-relation 5385. Up to 2265 conditions per place. [2022-12-13 13:50:49,181 INFO L137 encePairwiseOnDemand]: 267/271 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-12-13 13:50:49,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 240 flow [2022-12-13 13:50:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:50:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:50:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2022-12-13 13:50:49,182 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5092250922509225 [2022-12-13 13:50:49,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2022-12-13 13:50:49,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2022-12-13 13:50:49,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:49,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2022-12-13 13:50:49,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,196 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 122 flow. Second operand 3 states and 414 transitions. [2022-12-13 13:50:49,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 240 flow [2022-12-13 13:50:49,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:50:49,197 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 120 flow [2022-12-13 13:50:49,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2022-12-13 13:50:49,198 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-12-13 13:50:49,198 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 120 flow [2022-12-13 13:50:49,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:49,198 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:50:49,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:50:49,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:49,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1178574861, now seen corresponding path program 1 times [2022-12-13 13:50:49,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:49,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767648538] [2022-12-13 13:50:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:49,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767648538] [2022-12-13 13:50:49,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767648538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:50:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557693744] [2022-12-13 13:50:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:50:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:50:49,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:50:49,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:50:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:50:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:50:49,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:50:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:49,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:50:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:49,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557693744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:50:49,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:50:49,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 13:50:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322513803] [2022-12-13 13:50:49,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:50:49,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:50:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:50:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:50:49,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 271 [2022-12-13 13:50:49,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 123.875) internal successors, (991), 8 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:49,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 271 [2022-12-13 13:50:49,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:49,746 INFO L130 PetriNetUnfolder]: 1347/2326 cut-off events. [2022-12-13 13:50:49,746 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2022-12-13 13:50:49,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 2326 events. 1347/2326 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 14214 event pairs, 51 based on Foata normal form. 7/2187 useless extension candidates. Maximal degree in co-relation 4427. Up to 1855 conditions per place. [2022-12-13 13:50:49,754 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 64 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2022-12-13 13:50:49,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 324 flow [2022-12-13 13:50:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:50:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:50:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2022-12-13 13:50:49,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5025830258302583 [2022-12-13 13:50:49,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2022-12-13 13:50:49,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2022-12-13 13:50:49,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:49,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2022-12-13 13:50:49,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,759 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 120 flow. Second operand 5 states and 681 transitions. [2022-12-13 13:50:49,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 324 flow [2022-12-13 13:50:49,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:50:49,761 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 124 flow [2022-12-13 13:50:49,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-13 13:50:49,762 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-12-13 13:50:49,762 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 124 flow [2022-12-13 13:50:49,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.875) internal successors, (991), 8 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:49,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:49,762 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 13:50:49,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:50:49,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:50:49,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 217620134, now seen corresponding path program 1 times [2022-12-13 13:50:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458315100] [2022-12-13 13:50:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:50:49,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:50:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:50:49,982 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:50:49,982 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:50:49,982 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 13:50:49,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 13:50:49,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 13:50:49,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 13:50:49,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 13:50:49,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 13:50:49,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 13:50:49,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:50:49,983 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 13:50:49,983 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:50:49,983 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 13:50:49,995 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:50:49,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-12-13 13:50:50,026 INFO L130 PetriNetUnfolder]: 50/414 cut-off events. [2022-12-13 13:50:50,027 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 13:50:50,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 414 events. 50/414 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1422 event pairs, 1 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 276. Up to 16 conditions per place. [2022-12-13 13:50:50,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 182 transitions, 394 flow [2022-12-13 13:50:50,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 182 transitions, 394 flow [2022-12-13 13:50:50,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:50:50,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 182 transitions, 394 flow [2022-12-13 13:50:50,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 182 transitions, 394 flow [2022-12-13 13:50:50,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-12-13 13:50:50,060 INFO L130 PetriNetUnfolder]: 50/414 cut-off events. [2022-12-13 13:50:50,060 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 13:50:50,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 414 events. 50/414 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1422 event pairs, 1 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 276. Up to 16 conditions per place. [2022-12-13 13:50:50,068 INFO L119 LiptonReduction]: Number of co-enabled transitions 14112 [2022-12-13 13:50:52,360 INFO L134 LiptonReduction]: Checked pairs total: 36805 [2022-12-13 13:50:52,361 INFO L136 LiptonReduction]: Total number of compositions: 134 [2022-12-13 13:50:52,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:50:52,362 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;@7117a882, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:50:52,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:50:52,363 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 13:50:52,363 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:50:52,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:52,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:50:52,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash 35593, now seen corresponding path program 1 times [2022-12-13 13:50:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925640902] [2022-12-13 13:50:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:52,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:52,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925640902] [2022-12-13 13:50:52,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925640902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:50:52,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:50:52,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:50:52,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052244030] [2022-12-13 13:50:52,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:50:52,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:50:52,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:50:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:50:52,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 316 [2022-12-13 13:50:52,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:52,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:52,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 316 [2022-12-13 13:50:52,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:55,439 INFO L130 PetriNetUnfolder]: 35207/52763 cut-off events. [2022-12-13 13:50:55,439 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2022-12-13 13:50:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103173 conditions, 52763 events. 35207/52763 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 380396 event pairs, 22873 based on Foata normal form. 10464/55490 useless extension candidates. Maximal degree in co-relation 8674. Up to 49660 conditions per place. [2022-12-13 13:50:55,686 INFO L137 encePairwiseOnDemand]: 292/316 looper letters, 55 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2022-12-13 13:50:55,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 286 flow [2022-12-13 13:50:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:50:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:50:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2022-12-13 13:50:55,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5559071729957806 [2022-12-13 13:50:55,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2022-12-13 13:50:55,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2022-12-13 13:50:55,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:55,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2022-12-13 13:50:55,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:55,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:55,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:55,692 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 188 flow. Second operand 3 states and 527 transitions. [2022-12-13 13:50:55,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 286 flow [2022-12-13 13:50:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:50:55,694 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 160 flow [2022-12-13 13:50:55,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=316, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2022-12-13 13:50:55,695 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2022-12-13 13:50:55,695 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 160 flow [2022-12-13 13:50:55,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:55,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:55,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:50:55,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:50:55,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash 35594, now seen corresponding path program 1 times [2022-12-13 13:50:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:55,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649924690] [2022-12-13 13:50:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:55,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649924690] [2022-12-13 13:50:55,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649924690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:50:55,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:50:55,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:50:55,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121539119] [2022-12-13 13:50:55,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:50:55,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:50:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:50:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:50:55,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 316 [2022-12-13 13:50:55,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:55,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:55,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 316 [2022-12-13 13:50:55,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:58,089 INFO L130 PetriNetUnfolder]: 28311/42030 cut-off events. [2022-12-13 13:50:58,089 INFO L131 PetriNetUnfolder]: For 2652/2652 co-relation queries the response was YES. [2022-12-13 13:50:58,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85175 conditions, 42030 events. 28311/42030 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 291106 event pairs, 25801 based on Foata normal form. 0/37982 useless extension candidates. Maximal degree in co-relation 85103. Up to 36555 conditions per place. [2022-12-13 13:50:58,314 INFO L137 encePairwiseOnDemand]: 312/316 looper letters, 67 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-12-13 13:50:58,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 342 flow [2022-12-13 13:50:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:50:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:50:58,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-12-13 13:50:58,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2022-12-13 13:50:58,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-12-13 13:50:58,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-12-13 13:50:58,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:58,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-12-13 13:50:58,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:58,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:58,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:58,319 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 160 flow. Second operand 3 states and 502 transitions. [2022-12-13 13:50:58,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 342 flow [2022-12-13 13:50:58,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:50:58,322 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 158 flow [2022-12-13 13:50:58,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=316, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2022-12-13 13:50:58,323 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2022-12-13 13:50:58,323 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 158 flow [2022-12-13 13:50:58,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:58,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:58,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:50:58,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:50:58,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:58,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1460842198, now seen corresponding path program 1 times [2022-12-13 13:50:58,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:58,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422495275] [2022-12-13 13:50:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:58,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:58,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:50:58,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422495275] [2022-12-13 13:50:58,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422495275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:50:58,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107625430] [2022-12-13 13:50:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:58,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:50:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:50:58,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:50:58,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:50:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:50:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:50:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:50:58,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:50:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:50:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:50:58,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107625430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:50:58,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:50:58,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 13:50:58,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406458944] [2022-12-13 13:50:58,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:50:58,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:50:58,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:50:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:50:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:50:58,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 316 [2022-12-13 13:50:58,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:58,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:50:58,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 316 [2022-12-13 13:50:58,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:50:59,389 INFO L130 PetriNetUnfolder]: 5560/9097 cut-off events. [2022-12-13 13:50:59,389 INFO L131 PetriNetUnfolder]: For 3277/3277 co-relation queries the response was YES. [2022-12-13 13:50:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20484 conditions, 9097 events. 5560/9097 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 60818 event pairs, 70 based on Foata normal form. 819/9914 useless extension candidates. Maximal degree in co-relation 20473. Up to 5346 conditions per place. [2022-12-13 13:50:59,428 INFO L137 encePairwiseOnDemand]: 312/316 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2022-12-13 13:50:59,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 94 transitions, 385 flow [2022-12-13 13:50:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:50:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:50:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 947 transitions. [2022-12-13 13:50:59,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4994725738396624 [2022-12-13 13:50:59,431 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 947 transitions. [2022-12-13 13:50:59,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 947 transitions. [2022-12-13 13:50:59,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:50:59,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 947 transitions. [2022-12-13 13:50:59,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.83333333333334) internal successors, (947), 6 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:59,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 316.0) internal successors, (2212), 7 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:59,436 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 316.0) internal successors, (2212), 7 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:59,436 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 158 flow. Second operand 6 states and 947 transitions. [2022-12-13 13:50:59,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 94 transitions, 385 flow [2022-12-13 13:50:59,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 378 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 13:50:59,441 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 118 flow [2022-12-13 13:50:59,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=316, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2022-12-13 13:50:59,442 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2022-12-13 13:50:59,442 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 118 flow [2022-12-13 13:50:59,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:50:59,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:50:59,443 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 13:50:59,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:50:59,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 13:50:59,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:50:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:50:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash 387312423, now seen corresponding path program 1 times [2022-12-13 13:50:59,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:50:59,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109014993] [2022-12-13 13:50:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:50:59,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:50:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:50:59,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:50:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:50:59,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:50:59,703 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:50:59,703 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 13:50:59,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 13:50:59,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 13:50:59,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 13:50:59,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 13:50:59,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 13:50:59,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 13:50:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:50:59,704 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 13:50:59,704 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:50:59,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 13:50:59,725 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 13:50:59,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 212 transitions, 468 flow [2022-12-13 13:50:59,800 INFO L130 PetriNetUnfolder]: 81/648 cut-off events. [2022-12-13 13:50:59,800 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:50:59,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 648 events. 81/648 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2675 event pairs, 6 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 434. Up to 32 conditions per place. [2022-12-13 13:50:59,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 212 transitions, 468 flow [2022-12-13 13:50:59,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 212 transitions, 468 flow [2022-12-13 13:50:59,807 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:50:59,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 212 transitions, 468 flow [2022-12-13 13:50:59,807 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 212 transitions, 468 flow [2022-12-13 13:50:59,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 212 transitions, 468 flow [2022-12-13 13:50:59,878 INFO L130 PetriNetUnfolder]: 81/648 cut-off events. [2022-12-13 13:50:59,878 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:50:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 648 events. 81/648 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2675 event pairs, 6 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 434. Up to 32 conditions per place. [2022-12-13 13:50:59,895 INFO L119 LiptonReduction]: Number of co-enabled transitions 22288 [2022-12-13 13:51:02,713 INFO L134 LiptonReduction]: Checked pairs total: 67231 [2022-12-13 13:51:02,713 INFO L136 LiptonReduction]: Total number of compositions: 149 [2022-12-13 13:51:02,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:51:02,715 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;@7117a882, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:51:02,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:51:02,716 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 13:51:02,716 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:51:02,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:51:02,716 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:51:02,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:51:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:51:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash 48104, now seen corresponding path program 1 times [2022-12-13 13:51:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:51:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474663675] [2022-12-13 13:51:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:51:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:51:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:51:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:51:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:51:02,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474663675] [2022-12-13 13:51:02,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474663675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:51:02,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:51:02,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:51:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286118303] [2022-12-13 13:51:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:51:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:51:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:51:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:51:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:51:02,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 361 [2022-12-13 13:51:02,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:02,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:51:02,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 361 [2022-12-13 13:51:02,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:51:29,820 INFO L130 PetriNetUnfolder]: 316706/440282 cut-off events. [2022-12-13 13:51:29,820 INFO L131 PetriNetUnfolder]: For 12215/12215 co-relation queries the response was YES. [2022-12-13 13:51:30,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862108 conditions, 440282 events. 316706/440282 cut-off events. For 12215/12215 co-relation queries the response was YES. Maximal size of possible extension queue 9872. Compared 3546560 event pairs, 234806 based on Foata normal form. 75343/462480 useless extension candidates. Maximal degree in co-relation 82457. Up to 415041 conditions per place. [2022-12-13 13:51:31,807 INFO L137 encePairwiseOnDemand]: 331/361 looper letters, 61 selfloop transitions, 2 changer transitions 1/82 dead transitions. [2022-12-13 13:51:31,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 82 transitions, 336 flow [2022-12-13 13:51:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:51:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:51:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-12-13 13:51:31,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5586334256694367 [2022-12-13 13:51:31,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-12-13 13:51:31,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-12-13 13:51:31,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:51:31,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-12-13 13:51:31,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:31,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:31,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:31,812 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 240 flow. Second operand 3 states and 605 transitions. [2022-12-13 13:51:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 82 transitions, 336 flow [2022-12-13 13:51:31,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:51:31,815 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 200 flow [2022-12-13 13:51:31,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2022-12-13 13:51:31,816 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-12-13 13:51:31,816 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 200 flow [2022-12-13 13:51:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:31,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:51:31,816 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:51:31,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:51:31,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:51:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:51:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash 48102, now seen corresponding path program 1 times [2022-12-13 13:51:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:51:31,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625118952] [2022-12-13 13:51:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:51:31,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:51:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:51:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:51:31,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:51:31,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625118952] [2022-12-13 13:51:31,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625118952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:51:31,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:51:31,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:51:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139866452] [2022-12-13 13:51:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:51:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:51:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:51:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:51:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:51:31,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2022-12-13 13:51:31,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:31,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:51:31,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2022-12-13 13:51:31,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:51:53,118 INFO L130 PetriNetUnfolder]: 253367/351476 cut-off events. [2022-12-13 13:51:53,118 INFO L131 PetriNetUnfolder]: For 22372/22372 co-relation queries the response was YES. [2022-12-13 13:51:53,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705777 conditions, 351476 events. 253367/351476 cut-off events. For 22372/22372 co-relation queries the response was YES. Maximal size of possible extension queue 7920. Compared 2765858 event pairs, 229706 based on Foata normal form. 0/323755 useless extension candidates. Maximal degree in co-relation 705709. Up to 301807 conditions per place. [2022-12-13 13:51:54,720 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 79 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2022-12-13 13:51:54,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 416 flow [2022-12-13 13:51:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:51:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:51:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-12-13 13:51:54,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5355493998153278 [2022-12-13 13:51:54,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-12-13 13:51:54,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-12-13 13:51:54,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:51:54,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-12-13 13:51:54,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:54,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:54,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:54,726 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 200 flow. Second operand 3 states and 580 transitions. [2022-12-13 13:51:54,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 416 flow [2022-12-13 13:51:54,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:51:54,732 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 198 flow [2022-12-13 13:51:54,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-12-13 13:51:54,733 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2022-12-13 13:51:54,733 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 198 flow [2022-12-13 13:51:54,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:54,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:51:54,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:51:54,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:51:54,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:51:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:51:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1514881292, now seen corresponding path program 1 times [2022-12-13 13:51:54,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:51:54,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016001644] [2022-12-13 13:51:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:51:54,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:51:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:51:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:51:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:51:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016001644] [2022-12-13 13:51:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016001644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:51:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561254956] [2022-12-13 13:51:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:51:54,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:51:54,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:51:54,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:51:54,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:51:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:51:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:51:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:51:54,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:51:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:51:54,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:51:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:51:54,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561254956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:51:54,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:51:54,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 13:51:54,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44724246] [2022-12-13 13:51:54,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:51:54,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:51:54,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:51:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:51:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:51:54,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2022-12-13 13:51:54,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:54,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:51:54,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2022-12-13 13:51:54,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:16,508 INFO L130 PetriNetUnfolder]: 257974/350560 cut-off events. [2022-12-13 13:52:16,508 INFO L131 PetriNetUnfolder]: For 25518/25518 co-relation queries the response was YES. [2022-12-13 13:52:17,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722598 conditions, 350560 events. 257974/350560 cut-off events. For 25518/25518 co-relation queries the response was YES. Maximal size of possible extension queue 7870. Compared 2644849 event pairs, 45309 based on Foata normal form. 8/332642 useless extension candidates. Maximal degree in co-relation 652602. Up to 276748 conditions per place. [2022-12-13 13:52:18,143 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 146 selfloop transitions, 8 changer transitions 0/172 dead transitions. [2022-12-13 13:52:18,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 172 transitions, 737 flow [2022-12-13 13:52:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:52:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:52:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1154 transitions. [2022-12-13 13:52:18,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5327793167128347 [2022-12-13 13:52:18,148 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1154 transitions. [2022-12-13 13:52:18,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1154 transitions. [2022-12-13 13:52:18,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:18,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1154 transitions. [2022-12-13 13:52:18,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,157 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,157 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 198 flow. Second operand 6 states and 1154 transitions. [2022-12-13 13:52:18,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 172 transitions, 737 flow [2022-12-13 13:52:28,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 172 transitions, 729 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:52:28,277 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 250 flow [2022-12-13 13:52:28,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2022-12-13 13:52:28,277 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 8 predicate places. [2022-12-13 13:52:28,277 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 250 flow [2022-12-13 13:52:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:28,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:28,278 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:28,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:52:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 13:52:28,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:52:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash -30941663, now seen corresponding path program 1 times [2022-12-13 13:52:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:52:28,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840150499] [2022-12-13 13:52:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:52:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:28,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:52:28,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840150499] [2022-12-13 13:52:28,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840150499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:28,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:28,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44025236] [2022-12-13 13:52:28,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:28,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:52:28,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:28,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:28,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 361 [2022-12-13 13:52:28,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:28,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:28,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 361 [2022-12-13 13:52:28,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:16,379 INFO L130 PetriNetUnfolder]: 553830/757685 cut-off events. [2022-12-13 13:53:16,379 INFO L131 PetriNetUnfolder]: For 185347/185347 co-relation queries the response was YES. [2022-12-13 13:53:18,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599372 conditions, 757685 events. 553830/757685 cut-off events. For 185347/185347 co-relation queries the response was YES. Maximal size of possible extension queue 14264. Compared 6045710 event pairs, 228407 based on Foata normal form. 0/727108 useless extension candidates. Maximal degree in co-relation 924002. Up to 514973 conditions per place. [2022-12-13 13:53:20,504 INFO L137 encePairwiseOnDemand]: 350/361 looper letters, 107 selfloop transitions, 10 changer transitions 0/132 dead transitions. [2022-12-13 13:53:20,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 132 transitions, 682 flow [2022-12-13 13:53:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:53:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:53:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-12-13 13:53:20,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5549399815327793 [2022-12-13 13:53:20,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-12-13 13:53:20,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-12-13 13:53:20,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:20,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-12-13 13:53:20,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,509 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 250 flow. Second operand 3 states and 601 transitions. [2022-12-13 13:53:20,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 132 transitions, 682 flow [2022-12-13 13:53:20,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 132 transitions, 675 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 13:53:20,747 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 324 flow [2022-12-13 13:53:20,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-12-13 13:53:20,747 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 11 predicate places. [2022-12-13 13:53:20,747 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 324 flow [2022-12-13 13:53:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:20,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:20,748 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:20,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:53:20,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:53:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1636274871, now seen corresponding path program 1 times [2022-12-13 13:53:20,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:20,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924792611] [2022-12-13 13:53:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:53:20,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:20,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924792611] [2022-12-13 13:53:20,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924792611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:53:20,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149873256] [2022-12-13 13:53:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:20,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:53:20,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:53:20,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:53:20,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:53:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:53:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:53:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:20,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:53:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149873256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:53:20,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:53:20,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 13:53:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374379913] [2022-12-13 13:53:20,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:53:20,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:53:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:53:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:53:21,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 361 [2022-12-13 13:53:21,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 162.83333333333334) internal successors, (1954), 12 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:21,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:21,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 361 [2022-12-13 13:53:21,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:27,008 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 131#L702-16true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 116#L707-13true, Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, Black: 246#(= ~global~0 0), 244#true, 21#L702-4true, t_funThread2of4ForFork0InUse, 45#L702-5true, t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:27,009 INFO L383 tUnfolder$Statistics]: this new event has 46 ancestors and is cut-off event [2022-12-13 13:53:27,009 INFO L386 tUnfolder$Statistics]: existing Event has 46 ancestors and is cut-off event [2022-12-13 13:53:27,009 INFO L386 tUnfolder$Statistics]: existing Event has 46 ancestors and is cut-off event [2022-12-13 13:53:27,009 INFO L386 tUnfolder$Statistics]: existing Event has 46 ancestors and is cut-off event [2022-12-13 13:53:27,466 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 131#L702-16true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, 67#ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 244#true, 21#L702-4true, t_funThread2of4ForFork0InUse, Black: 246#(= ~global~0 0), t_funThread3of4ForFork0InUse, 45#L702-5true, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:27,466 INFO L383 tUnfolder$Statistics]: this new event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,467 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,467 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,467 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,468 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 131#L702-16true, 56#L707-7true, Black: 200#true, Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, 244#true, 21#L702-4true, t_funThread2of4ForFork0InUse, Black: 246#(= ~global~0 0), t_funThread3of4ForFork0InUse, 45#L702-5true, 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:27,468 INFO L383 tUnfolder$Statistics]: this new event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,468 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,468 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,468 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,469 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 116#L707-13true, Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 140#t_funEXITtrue, Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, Black: 246#(= ~global~0 0), 244#true, 21#L702-4true, t_funThread2of4ForFork0InUse, 45#L702-5true, t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:27,469 INFO L383 tUnfolder$Statistics]: this new event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,469 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,469 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,469 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:27,756 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 140#t_funEXITtrue, Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, 67#ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 244#true, 21#L702-4true, t_funThread2of4ForFork0InUse, Black: 246#(= ~global~0 0), t_funThread3of4ForFork0InUse, 45#L702-5true, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:27,756 INFO L383 tUnfolder$Statistics]: this new event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,756 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,756 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,756 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,757 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 56#L707-7true, Black: 200#true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 140#t_funEXITtrue, t_funThread1of4ForFork0InUse, 244#true, 21#L702-4true, Black: 246#(= ~global~0 0), t_funThread2of4ForFork0InUse, 45#L702-5true, t_funThread3of4ForFork0InUse, 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:27,758 INFO L383 tUnfolder$Statistics]: this new event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,758 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,758 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:27,758 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:28,103 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1403] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][134], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 83#L702-13true, 53#L702-12true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 116#L707-13true, Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, Black: 246#(= ~global~0 0), t_funThread2of4ForFork0InUse, 244#true, 21#L702-4true, t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:28,103 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2022-12-13 13:53:28,103 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 13:53:28,103 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 13:53:28,103 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 13:53:28,323 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1403] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][134], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 83#L702-13true, 53#L702-12true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, 67#ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, t_funThread2of4ForFork0InUse, 244#true, 21#L702-4true, Black: 246#(= ~global~0 0), t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:28,323 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,323 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,324 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,324 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,324 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1403] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][134], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 83#L702-13true, 37#L702-12true, 56#L707-7true, 53#L702-12true, Black: 200#true, Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, t_funThread2of4ForFork0InUse, 244#true, 21#L702-4true, Black: 246#(= ~global~0 0), t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse, 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))]) [2022-12-13 13:53:28,324 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,324 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,324 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:28,324 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:29,107 INFO L130 PetriNetUnfolder]: 85521/119359 cut-off events. [2022-12-13 13:53:29,107 INFO L131 PetriNetUnfolder]: For 138239/138311 co-relation queries the response was YES. [2022-12-13 13:53:29,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317486 conditions, 119359 events. 85521/119359 cut-off events. For 138239/138311 co-relation queries the response was YES. Maximal size of possible extension queue 3379. Compared 867472 event pairs, 11807 based on Foata normal form. 6598/121274 useless extension candidates. Maximal degree in co-relation 198021. Up to 81679 conditions per place. [2022-12-13 13:53:29,765 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 119 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2022-12-13 13:53:29,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 692 flow [2022-12-13 13:53:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:53:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:53:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1238 transitions. [2022-12-13 13:53:29,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4899089829837752 [2022-12-13 13:53:29,768 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1238 transitions. [2022-12-13 13:53:29,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1238 transitions. [2022-12-13 13:53:29,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:29,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1238 transitions. [2022-12-13 13:53:29,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.85714285714286) internal successors, (1238), 7 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:29,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:29,773 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:29,773 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 324 flow. Second operand 7 states and 1238 transitions. [2022-12-13 13:53:29,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 692 flow [2022-12-13 13:53:29,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 652 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 13:53:29,830 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 214 flow [2022-12-13 13:53:29,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2022-12-13 13:53:29,831 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2022-12-13 13:53:29,831 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 214 flow [2022-12-13 13:53:29,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.83333333333334) internal successors, (1954), 12 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:29,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:29,832 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:29,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:53:30,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 13:53:30,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:53:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:30,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1525219506, now seen corresponding path program 1 times [2022-12-13 13:53:30,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:30,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049667329] [2022-12-13 13:53:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:30,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:30,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049667329] [2022-12-13 13:53:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049667329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:53:30,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953466621] [2022-12-13 13:53:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:30,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:53:30,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:53:30,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:53:30,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:53:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 13:53:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:53:30,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:53:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:30,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:53:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:30,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953466621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:53:30,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:53:30,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 13:53:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288984541] [2022-12-13 13:53:30,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:53:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:53:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:53:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:53:30,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2022-12-13 13:53:30,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 214 flow. Second operand has 16 states, 16 states have (on average 168.4375) internal successors, (2695), 16 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:30,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:30,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2022-12-13 13:53:30,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:53:35,734 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][132], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 131#L702-16true, 116#L707-13true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, 21#L702-4true, Black: 246#(= ~global~0 0), t_funThread2of4ForFork0InUse, 416#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread3of4ForFork0InUse, 45#L702-5true, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:35,734 INFO L383 tUnfolder$Statistics]: this new event has 46 ancestors and is cut-off event [2022-12-13 13:53:35,734 INFO L386 tUnfolder$Statistics]: existing Event has 46 ancestors and is cut-off event [2022-12-13 13:53:35,734 INFO L386 tUnfolder$Statistics]: existing Event has 46 ancestors and is cut-off event [2022-12-13 13:53:35,734 INFO L386 tUnfolder$Statistics]: existing Event has 46 ancestors and is cut-off event [2022-12-13 13:53:35,975 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][132], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 131#L702-16true, 56#L707-7true, Black: 200#true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, Black: 246#(= ~global~0 0), 21#L702-4true, t_funThread2of4ForFork0InUse, 416#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread3of4ForFork0InUse, 45#L702-5true, t_funThread4of4ForFork0InUse, 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))]) [2022-12-13 13:53:35,976 INFO L383 tUnfolder$Statistics]: this new event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,976 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,976 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,976 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,977 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][132], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 116#L707-13true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 140#t_funEXITtrue, 200#true, t_funThread1of4ForFork0InUse, Black: 246#(= ~global~0 0), 21#L702-4true, t_funThread2of4ForFork0InUse, 416#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 45#L702-5true, t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:35,977 INFO L383 tUnfolder$Statistics]: this new event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,977 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,977 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:35,977 INFO L386 tUnfolder$Statistics]: existing Event has 47 ancestors and is cut-off event [2022-12-13 13:53:36,193 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1390] L702-3-->L702-5: Formula: (= v_~global~0_129 (+ |v_t_funThread4of4ForFork0_#t~post5_12| 1)) InVars {t_funThread4of4ForFork0_#t~post5=|v_t_funThread4of4ForFork0_#t~post5_12|} OutVars{~global~0=v_~global~0_129} AuxVars[] AssignedVars[t_funThread4of4ForFork0_#t~post5, ~global~0][132], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 56#L707-7true, Black: 200#true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 140#t_funEXITtrue, t_funThread1of4ForFork0InUse, Black: 246#(= ~global~0 0), 21#L702-4true, t_funThread2of4ForFork0InUse, 416#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 45#L702-5true, t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse, 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))]) [2022-12-13 13:53:36,193 INFO L383 tUnfolder$Statistics]: this new event has 48 ancestors and is cut-off event [2022-12-13 13:53:36,193 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:36,193 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:36,193 INFO L386 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-12-13 13:53:36,449 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1403] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 37#L702-12true, 83#L702-13true, 53#L702-12true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 116#L707-13true, Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), 200#true, t_funThread1of4ForFork0InUse, 21#L702-4true, Black: 246#(= ~global~0 0), t_funThread2of4ForFork0InUse, 416#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:36,449 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2022-12-13 13:53:36,449 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 13:53:36,449 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 13:53:36,449 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 13:53:36,618 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1403] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][133], [Black: 193#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 83#L702-13true, 37#L702-12true, 53#L702-12true, 56#L707-7true, Black: 200#true, 353#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9999) (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), Black: 238#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 219#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, 21#L702-4true, Black: 246#(= ~global~0 0), t_funThread2of4ForFork0InUse, 416#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread3of4ForFork0InUse, 223#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), t_funThread4of4ForFork0InUse]) [2022-12-13 13:53:36,619 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 13:53:36,619 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:36,619 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:36,619 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 13:53:37,322 INFO L130 PetriNetUnfolder]: 65266/95186 cut-off events. [2022-12-13 13:53:37,322 INFO L131 PetriNetUnfolder]: For 78143/78167 co-relation queries the response was YES. [2022-12-13 13:53:37,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235957 conditions, 95186 events. 65266/95186 cut-off events. For 78143/78167 co-relation queries the response was YES. Maximal size of possible extension queue 2770. Compared 730731 event pairs, 2409 based on Foata normal form. 6355/99104 useless extension candidates. Maximal degree in co-relation 49481. Up to 57180 conditions per place. [2022-12-13 13:53:37,832 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 118 selfloop transitions, 5 changer transitions 0/141 dead transitions. [2022-12-13 13:53:37,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 141 transitions, 650 flow [2022-12-13 13:53:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:53:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:53:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1277 transitions. [2022-12-13 13:53:37,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5053423031262366 [2022-12-13 13:53:37,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1277 transitions. [2022-12-13 13:53:37,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1277 transitions. [2022-12-13 13:53:37,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:53:37,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1277 transitions. [2022-12-13 13:53:37,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.42857142857142) internal successors, (1277), 7 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:37,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:37,840 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:37,840 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 214 flow. Second operand 7 states and 1277 transitions. [2022-12-13 13:53:37,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 141 transitions, 650 flow [2022-12-13 13:53:37,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 141 transitions, 631 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 13:53:37,874 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 195 flow [2022-12-13 13:53:37,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2022-12-13 13:53:37,874 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 13:53:37,874 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 195 flow [2022-12-13 13:53:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.4375) internal successors, (2695), 16 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:37,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:37,875 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:37,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:53:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb7fbe5d-0923-4359-bcdf-1ebf567bbb1e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 13:53:38,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:53:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 37165716, now seen corresponding path program 1 times [2022-12-13 13:53:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:38,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435730661] [2022-12-13 13:53:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:53:38,089 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:53:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:53:38,100 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:53:38,101 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 13:53:38,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 13:53:38,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:53:38,102 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:53:38,102 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:53:38,102 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 13:53:38,121 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 13:53:38,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 242 transitions, 544 flow [2022-12-13 13:53:38,226 INFO L130 PetriNetUnfolder]: 140/1062 cut-off events. [2022-12-13 13:53:38,227 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 13:53:38,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 1062 events. 140/1062 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5305 event pairs, 23 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 693. Up to 80 conditions per place. [2022-12-13 13:53:38,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 242 transitions, 544 flow [2022-12-13 13:53:38,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 242 transitions, 544 flow [2022-12-13 13:53:38,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:53:38,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 242 transitions, 544 flow [2022-12-13 13:53:38,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 242 transitions, 544 flow [2022-12-13 13:53:38,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 242 transitions, 544 flow [2022-12-13 13:53:38,338 INFO L130 PetriNetUnfolder]: 140/1062 cut-off events. [2022-12-13 13:53:38,338 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 13:53:38,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 1062 events. 140/1062 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5305 event pairs, 23 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 693. Up to 80 conditions per place. [2022-12-13 13:53:38,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 32200 [2022-12-13 13:53:40,606 INFO L134 LiptonReduction]: Checked pairs total: 99252 [2022-12-13 13:53:40,606 INFO L136 LiptonReduction]: Total number of compositions: 164 [2022-12-13 13:53:40,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:53:40,607 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;@7117a882, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:53:40,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:53:40,608 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 13:53:40,608 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:53:40,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:53:40,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:53:40,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 13:53:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:53:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash 62052, now seen corresponding path program 1 times [2022-12-13 13:53:40,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:53:40,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240715753] [2022-12-13 13:53:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:53:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:53:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:53:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:53:40,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:53:40,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240715753] [2022-12-13 13:53:40,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240715753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:53:40,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:53:40,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:53:40,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591251060] [2022-12-13 13:53:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:53:40,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:53:40,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:53:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:53:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:53:40,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 406 [2022-12-13 13:53:40,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:53:40,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:53:40,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 406 [2022-12-13 13:53:40,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand