./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:25:33,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:25:33,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:25:33,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:25:33,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:25:33,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:25:33,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:25:33,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:25:33,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:25:33,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:25:33,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:25:33,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:25:33,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:25:33,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:25:33,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:25:33,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:25:33,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:25:33,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:25:33,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:25:33,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:25:33,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:25:33,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:25:33,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:25:33,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:25:33,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:25:33,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:25:33,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:25:33,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:25:33,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:25:33,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:25:33,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:25:33,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:25:33,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:25:33,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:25:33,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:25:33,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:25:33,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:25:33,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:25:33,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:25:33,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:25:33,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:25:33,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:25:33,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:25:33,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:25:33,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:25:33,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:25:33,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:25:33,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:25:33,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:25:33,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:25:33,480 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:25:33,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:25:33,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:25:33,482 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:25:33,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:25:33,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:25:33,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:25:33,483 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:25:33,483 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:25:33,484 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:25:33,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:25:33,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:25:33,484 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:25:33,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:25:33,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:25:33,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:25:33,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:25:33,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:25:33,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:25:33,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:25:33,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:25:33,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:25:33,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:25:33,487 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:25:33,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:25:33,487 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_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2022-11-25 18:25:33,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:25:33,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:25:33,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:25:33,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:25:33,839 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:25:33,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-11-25 18:25:36,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:25:37,240 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:25:37,241 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-11-25 18:25:37,254 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/data/b03de9f2a/8c855345068449208b38ffc9ee6fbceb/FLAG13e7c3785 [2022-11-25 18:25:37,271 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/data/b03de9f2a/8c855345068449208b38ffc9ee6fbceb [2022-11-25 18:25:37,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:25:37,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:25:37,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:25:37,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:25:37,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:25:37,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:37,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604cf0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37, skipping insertion in model container [2022-11-25 18:25:37,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:37,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:25:37,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:25:37,778 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_3ffe3e59-167f-4573-be02-738d265c5425/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-11-25 18:25:37,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:25:37,840 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:25:37,885 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_3ffe3e59-167f-4573-be02-738d265c5425/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-11-25 18:25:37,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:25:37,951 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:25:37,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37 WrapperNode [2022-11-25 18:25:37,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:25:37,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:25:37,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:25:37,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:25:37,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,037 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-11-25 18:25:38,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:25:38,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:25:38,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:25:38,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:25:38,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:25:38,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:25:38,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:25:38,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:25:38,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (1/1) ... [2022-11-25 18:25:38,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:25:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:25:38,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:25:38,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:25:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:25:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:25:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:25:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:25:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:25:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 18:25:38,199 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 18:25:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:25:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:25:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:25:38,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:25:38,202 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:25:38,402 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:25:38,404 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:25:38,745 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:25:38,753 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:25:38,756 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 18:25:38,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:25:38 BoogieIcfgContainer [2022-11-25 18:25:38,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:25:38,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:25:38,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:25:38,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:25:38,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:25:37" (1/3) ... [2022-11-25 18:25:38,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a3247e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:25:38, skipping insertion in model container [2022-11-25 18:25:38,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:37" (2/3) ... [2022-11-25 18:25:38,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a3247e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:25:38, skipping insertion in model container [2022-11-25 18:25:38,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:25:38" (3/3) ... [2022-11-25 18:25:38,773 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2022-11-25 18:25:38,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:25:38,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 18:25:38,798 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:25:38,861 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 18:25:38,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-11-25 18:25:38,994 INFO L130 PetriNetUnfolder]: 17/171 cut-off events. [2022-11-25 18:25:38,994 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:25:39,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 171 events. 17/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 464 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2022-11-25 18:25:39,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2022-11-25 18:25:39,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 123 transitions, 254 flow [2022-11-25 18:25:39,014 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:25:39,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 123 transitions, 254 flow [2022-11-25 18:25:39,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 123 transitions, 254 flow [2022-11-25 18:25:39,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-11-25 18:25:39,109 INFO L130 PetriNetUnfolder]: 17/171 cut-off events. [2022-11-25 18:25:39,110 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:25:39,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 171 events. 17/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 464 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2022-11-25 18:25:39,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 3564 [2022-11-25 18:25:43,717 INFO L134 LiptonReduction]: Checked pairs total: 5251 [2022-11-25 18:25:43,717 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-11-25 18:25:43,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:25:43,771 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;@597dc93c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:25:43,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:25:43,776 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:25:43,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:25:43,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:43,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:25:43,779 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)] === [2022-11-25 18:25:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 15457, now seen corresponding path program 1 times [2022-11-25 18:25:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:43,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125044473] [2022-11-25 18:25:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:43,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:44,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125044473] [2022-11-25 18:25:44,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125044473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:25:44,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:25:44,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:25:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335201539] [2022-11-25 18:25:44,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:25:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:25:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:25:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:25:44,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 240 [2022-11-25 18:25:44,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:44,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:44,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 240 [2022-11-25 18:25:44,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:44,596 INFO L130 PetriNetUnfolder]: 120/277 cut-off events. [2022-11-25 18:25:44,597 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:25:44,602 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 1039 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. [2022-11-25 18:25:44,609 INFO L137 encePairwiseOnDemand]: 228/240 looper letters, 34 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2022-11-25 18:25:44,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 160 flow [2022-11-25 18:25:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:25:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:25:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-11-25 18:25:44,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2022-11-25 18:25:44,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-11-25 18:25:44,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-11-25 18:25:44,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:44,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-11-25 18:25:44,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:44,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:44,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:44,671 INFO L175 Difference]: Start difference. First operand has 31 places, 37 transitions, 82 flow. Second operand 3 states and 365 transitions. [2022-11-25 18:25:44,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 160 flow [2022-11-25 18:25:44,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:25:44,683 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 74 flow [2022-11-25 18:25:44,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, 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} [2022-11-25 18:25:44,691 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2022-11-25 18:25:44,691 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 74 flow [2022-11-25 18:25:44,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:44,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:44,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:25:44,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:25:44,694 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)] === [2022-11-25 18:25:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash 15456, now seen corresponding path program 1 times [2022-11-25 18:25:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005743549] [2022-11-25 18:25:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:44,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005743549] [2022-11-25 18:25:44,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005743549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:25:44,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:25:44,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:25:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417278947] [2022-11-25 18:25:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:25:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:25:44,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:44,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:25:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:25:44,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 240 [2022-11-25 18:25:44,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:44,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:44,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 240 [2022-11-25 18:25:44,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:44,989 INFO L130 PetriNetUnfolder]: 96/224 cut-off events. [2022-11-25 18:25:44,989 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-25 18:25:44,990 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 781 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. [2022-11-25 18:25:44,991 INFO L137 encePairwiseOnDemand]: 236/240 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-11-25 18:25:44,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 150 flow [2022-11-25 18:25:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:25:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:25:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2022-11-25 18:25:44,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46805555555555556 [2022-11-25 18:25:44,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2022-11-25 18:25:44,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2022-11-25 18:25:44,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:44,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2022-11-25 18:25:44,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,001 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 74 flow. Second operand 3 states and 337 transitions. [2022-11-25 18:25:45,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 150 flow [2022-11-25 18:25:45,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:25:45,004 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 70 flow [2022-11-25 18:25:45,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, 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} [2022-11-25 18:25:45,006 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-11-25 18:25:45,006 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 70 flow [2022-11-25 18:25:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:45,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:25:45,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:25:45,007 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)] === [2022-11-25 18:25:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 460845988, now seen corresponding path program 1 times [2022-11-25 18:25:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:45,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183719610] [2022-11-25 18:25:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:45,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:45,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183719610] [2022-11-25 18:25:45,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183719610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:25:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599569728] [2022-11-25 18:25:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:25:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:25:45,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:25:45,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:25:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:25:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:25:45,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:25:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:45,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:25:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:45,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599569728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:25:45,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:25:45,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:25:45,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14830382] [2022-11-25 18:25:45,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:25:45,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:25:45,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:25:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:25:45,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 240 [2022-11-25 18:25:45,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:45,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 240 [2022-11-25 18:25:45,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:45,959 INFO L130 PetriNetUnfolder]: 16/55 cut-off events. [2022-11-25 18:25:45,959 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:25:45,960 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 128 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. [2022-11-25 18:25:45,960 INFO L137 encePairwiseOnDemand]: 236/240 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-11-25 18:25:45,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 97 flow [2022-11-25 18:25:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:25:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:25:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 423 transitions. [2022-11-25 18:25:45,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.440625 [2022-11-25 18:25:45,964 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 423 transitions. [2022-11-25 18:25:45,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 423 transitions. [2022-11-25 18:25:45,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:45,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 423 transitions. [2022-11-25 18:25:45,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,969 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,969 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 4 states and 423 transitions. [2022-11-25 18:25:45,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 97 flow [2022-11-25 18:25:45,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:25:45,970 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 38 flow [2022-11-25 18:25:45,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, 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} [2022-11-25 18:25:45,972 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -10 predicate places. [2022-11-25 18:25:45,973 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 38 flow [2022-11-25 18:25:45,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.875) internal successors, (815), 8 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:45,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:45,974 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 18:25:45,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:25:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:25:46,180 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)] === [2022-11-25 18:25:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1401324106, now seen corresponding path program 1 times [2022-11-25 18:25:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:46,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605909276] [2022-11-25 18:25:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:25:46,206 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:25:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:25:46,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:25:46,239 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:25:46,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:25:46,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 18:25:46,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 18:25:46,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 18:25:46,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 18:25:46,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 18:25:46,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 18:25:46,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:25:46,245 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:25:46,249 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:25:46,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:25:46,275 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:25:46,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-11-25 18:25:46,337 INFO L130 PetriNetUnfolder]: 31/284 cut-off events. [2022-11-25 18:25:46,337 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:25:46,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 31/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 947 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2022-11-25 18:25:46,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 334 flow [2022-11-25 18:25:46,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 334 flow [2022-11-25 18:25:46,351 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:25:46,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 158 transitions, 334 flow [2022-11-25 18:25:46,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 158 transitions, 334 flow [2022-11-25 18:25:46,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-11-25 18:25:46,411 INFO L130 PetriNetUnfolder]: 31/284 cut-off events. [2022-11-25 18:25:46,411 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:25:46,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 31/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 947 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2022-11-25 18:25:46,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 10032 [2022-11-25 18:25:50,879 INFO L134 LiptonReduction]: Checked pairs total: 19928 [2022-11-25 18:25:50,879 INFO L136 LiptonReduction]: Total number of compositions: 141 [2022-11-25 18:25:50,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:25:50,883 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;@597dc93c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:25:50,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:25:50,885 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:25:50,885 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:25:50,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:50,885 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:25:50,886 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)] === [2022-11-25 18:25:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash 26132, now seen corresponding path program 1 times [2022-11-25 18:25:50,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:50,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919467221] [2022-11-25 18:25:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:50,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:50,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919467221] [2022-11-25 18:25:50,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919467221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:25:50,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:25:50,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:25:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093479855] [2022-11-25 18:25:50,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:25:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:25:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:25:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:25:50,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 299 [2022-11-25 18:25:50,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:50,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:50,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 299 [2022-11-25 18:25:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:51,509 INFO L130 PetriNetUnfolder]: 2115/3744 cut-off events. [2022-11-25 18:25:51,509 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-25 18:25:51,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7257 conditions, 3744 events. 2115/3744 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 22849 event pairs, 1784 based on Foata normal form. 273/3393 useless extension candidates. Maximal degree in co-relation 4363. Up to 2932 conditions per place. [2022-11-25 18:25:51,533 INFO L137 encePairwiseOnDemand]: 280/299 looper letters, 48 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2022-11-25 18:25:51,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 240 flow [2022-11-25 18:25:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:25:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:25:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2022-11-25 18:25:51,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5161649944258639 [2022-11-25 18:25:51,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2022-11-25 18:25:51,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2022-11-25 18:25:51,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:51,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2022-11-25 18:25:51,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:51,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:51,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:51,541 INFO L175 Difference]: Start difference. First operand has 49 places, 60 transitions, 138 flow. Second operand 3 states and 463 transitions. [2022-11-25 18:25:51,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 240 flow [2022-11-25 18:25:51,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:25:51,543 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 108 flow [2022-11-25 18:25:51,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=108, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2022-11-25 18:25:51,545 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2022-11-25 18:25:51,545 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 108 flow [2022-11-25 18:25:51,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:51,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:51,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:25:51,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:25:51,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:25:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 26133, now seen corresponding path program 1 times [2022-11-25 18:25:51,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:51,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951223035] [2022-11-25 18:25:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951223035] [2022-11-25 18:25:51,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951223035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:25:51,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:25:51,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:25:51,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023602462] [2022-11-25 18:25:51,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:25:51,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:25:51,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:51,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:25:51,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:25:51,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 299 [2022-11-25 18:25:51,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:51,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:51,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 299 [2022-11-25 18:25:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:52,189 INFO L130 PetriNetUnfolder]: 1954/3451 cut-off events. [2022-11-25 18:25:52,190 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-11-25 18:25:52,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 3451 events. 1954/3451 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 20848 event pairs, 904 based on Foata normal form. 0/3044 useless extension candidates. Maximal degree in co-relation 6172. Up to 3175 conditions per place. [2022-11-25 18:25:52,214 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 42 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-11-25 18:25:52,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 216 flow [2022-11-25 18:25:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:25:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:25:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2022-11-25 18:25:52,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48940914158305465 [2022-11-25 18:25:52,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2022-11-25 18:25:52,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2022-11-25 18:25:52,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:52,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2022-11-25 18:25:52,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:52,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:52,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:52,222 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 108 flow. Second operand 3 states and 439 transitions. [2022-11-25 18:25:52,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 216 flow [2022-11-25 18:25:52,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:25:52,230 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 118 flow [2022-11-25 18:25:52,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-11-25 18:25:52,236 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2022-11-25 18:25:52,241 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 118 flow [2022-11-25 18:25:52,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:52,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:52,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:25:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:25:52,244 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)] === [2022-11-25 18:25:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1614844305, now seen corresponding path program 1 times [2022-11-25 18:25:52,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553489574] [2022-11-25 18:25:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:52,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553489574] [2022-11-25 18:25:52,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553489574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:25:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418419700] [2022-11-25 18:25:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:52,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:25:52,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:25:52,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:25:52,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:25:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:25:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:25:52,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:25:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:52,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:25:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418419700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:25:52,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:25:52,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 18:25:52,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535316840] [2022-11-25 18:25:52,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:25:52,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:25:52,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:25:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:25:52,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 299 [2022-11-25 18:25:52,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 129.71428571428572) internal successors, (908), 7 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:52,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:52,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 299 [2022-11-25 18:25:52,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:53,315 INFO L130 PetriNetUnfolder]: 1753/2989 cut-off events. [2022-11-25 18:25:53,316 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-11-25 18:25:53,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 2989 events. 1753/2989 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 17717 event pairs, 1 based on Foata normal form. 9/2716 useless extension candidates. Maximal degree in co-relation 689. Up to 2391 conditions per place. [2022-11-25 18:25:53,339 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 72 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-11-25 18:25:53,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 350 flow [2022-11-25 18:25:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:25:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:25:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 719 transitions. [2022-11-25 18:25:53,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4809364548494983 [2022-11-25 18:25:53,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 719 transitions. [2022-11-25 18:25:53,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 719 transitions. [2022-11-25 18:25:53,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:53,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 719 transitions. [2022-11-25 18:25:53,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:53,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:53,384 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:53,384 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 118 flow. Second operand 5 states and 719 transitions. [2022-11-25 18:25:53,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 85 transitions, 350 flow [2022-11-25 18:25:53,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 85 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:25:53,388 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 124 flow [2022-11-25 18:25:53,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, 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} [2022-11-25 18:25:53,389 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 18:25:53,390 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 124 flow [2022-11-25 18:25:53,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.71428571428572) internal successors, (908), 7 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:53,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:53,391 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 18:25:53,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:25:53,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 18:25:53,598 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)] === [2022-11-25 18:25:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -130639494, now seen corresponding path program 1 times [2022-11-25 18:25:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:53,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850504201] [2022-11-25 18:25:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:25:53,616 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:25:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:25:53,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:25:53,643 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:25:53,644 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:25:53,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 18:25:53,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 18:25:53,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 18:25:53,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 18:25:53,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 18:25:53,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 18:25:53,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:25:53,645 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:25:53,646 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:25:53,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:25:53,685 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:25:53,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-11-25 18:25:53,758 INFO L130 PetriNetUnfolder]: 50/440 cut-off events. [2022-11-25 18:25:53,758 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:25:53,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 440 events. 50/440 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1627 event pairs, 1 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2022-11-25 18:25:53,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 193 transitions, 416 flow [2022-11-25 18:25:53,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 193 transitions, 416 flow [2022-11-25 18:25:53,766 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:25:53,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 193 transitions, 416 flow [2022-11-25 18:25:53,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 193 transitions, 416 flow [2022-11-25 18:25:53,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-11-25 18:25:53,833 INFO L130 PetriNetUnfolder]: 50/440 cut-off events. [2022-11-25 18:25:53,833 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:25:53,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 440 events. 50/440 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1627 event pairs, 1 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2022-11-25 18:25:53,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 18612 [2022-11-25 18:25:58,430 INFO L134 LiptonReduction]: Checked pairs total: 37889 [2022-11-25 18:25:58,430 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-11-25 18:25:58,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:25:58,433 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;@597dc93c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:25:58,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:25:58,435 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:25:58,435 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:25:58,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:58,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:25:58,435 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)] === [2022-11-25 18:25:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 38829, now seen corresponding path program 1 times [2022-11-25 18:25:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629586029] [2022-11-25 18:25:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:58,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629586029] [2022-11-25 18:25:58,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629586029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:25:58,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:25:58,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:25:58,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904774400] [2022-11-25 18:25:58,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:25:58,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:25:58,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:25:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:25:58,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 362 [2022-11-25 18:25:58,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:58,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:58,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 362 [2022-11-25 18:25:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:03,843 INFO L130 PetriNetUnfolder]: 24204/36867 cut-off events. [2022-11-25 18:26:03,844 INFO L131 PetriNetUnfolder]: For 875/875 co-relation queries the response was YES. [2022-11-25 18:26:03,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71827 conditions, 36867 events. 24204/36867 cut-off events. For 875/875 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 269912 event pairs, 20297 based on Foata normal form. 6738/38663 useless extension candidates. Maximal degree in co-relation 10392. Up to 28892 conditions per place. [2022-11-25 18:26:04,049 INFO L137 encePairwiseOnDemand]: 337/362 looper letters, 62 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2022-11-25 18:26:04,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 318 flow [2022-11-25 18:26:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:26:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:26:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2022-11-25 18:26:04,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2022-11-25 18:26:04,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2022-11-25 18:26:04,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2022-11-25 18:26:04,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:04,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2022-11-25 18:26:04,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:04,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:04,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:04,057 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 188 flow. Second operand 3 states and 570 transitions. [2022-11-25 18:26:04,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 318 flow [2022-11-25 18:26:04,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:26:04,060 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 146 flow [2022-11-25 18:26:04,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=146, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-11-25 18:26:04,061 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-11-25 18:26:04,061 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 146 flow [2022-11-25 18:26:04,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:04,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:04,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:26:04,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:26:04,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:26:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash 38830, now seen corresponding path program 1 times [2022-11-25 18:26:04,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:04,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546827527] [2022-11-25 18:26:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:26:04,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546827527] [2022-11-25 18:26:04,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546827527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:04,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:04,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:26:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127115406] [2022-11-25 18:26:04,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:04,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:26:04,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:04,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:26:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:26:04,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2022-11-25 18:26:04,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:04,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:04,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2022-11-25 18:26:04,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:07,466 INFO L130 PetriNetUnfolder]: 22295/34402 cut-off events. [2022-11-25 18:26:07,466 INFO L131 PetriNetUnfolder]: For 1477/1477 co-relation queries the response was YES. [2022-11-25 18:26:07,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67461 conditions, 34402 events. 22295/34402 cut-off events. For 1477/1477 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 251988 event pairs, 14463 based on Foata normal form. 0/31292 useless extension candidates. Maximal degree in co-relation 61022. Up to 31594 conditions per place. [2022-11-25 18:26:07,703 INFO L137 encePairwiseOnDemand]: 358/362 looper letters, 49 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2022-11-25 18:26:07,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 266 flow [2022-11-25 18:26:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:26:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:26:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2022-11-25 18:26:07,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4852670349907919 [2022-11-25 18:26:07,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2022-11-25 18:26:07,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2022-11-25 18:26:07,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:07,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2022-11-25 18:26:07,870 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) [2022-11-25 18:26:07,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:07,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:07,873 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 146 flow. Second operand 3 states and 527 transitions. [2022-11-25 18:26:07,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 266 flow [2022-11-25 18:26:07,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:26:07,959 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 156 flow [2022-11-25 18:26:07,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2022-11-25 18:26:07,963 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-11-25 18:26:07,963 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 156 flow [2022-11-25 18:26:07,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:07,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:07,964 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:26:07,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:26:07,964 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)] === [2022-11-25 18:26:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:07,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1529663552, now seen corresponding path program 1 times [2022-11-25 18:26:07,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:07,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303983095] [2022-11-25 18:26:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:07,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:26:08,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:08,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303983095] [2022-11-25 18:26:08,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303983095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:08,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629735762] [2022-11-25 18:26:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:08,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:08,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:08,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:26:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:26:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:08,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:26:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:26:08,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:26:08,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629735762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:26:08,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:26:08,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:26:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965500718] [2022-11-25 18:26:08,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:26:08,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:26:08,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:26:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:26:08,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 362 [2022-11-25 18:26:08,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 155.875) internal successors, (1247), 8 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:08,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:08,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 362 [2022-11-25 18:26:08,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:09,411 INFO L130 PetriNetUnfolder]: 4342/7165 cut-off events. [2022-11-25 18:26:09,411 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-11-25 18:26:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16127 conditions, 7165 events. 4342/7165 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 47160 event pairs, 0 based on Foata normal form. 648/7813 useless extension candidates. Maximal degree in co-relation 2069. Up to 4192 conditions per place. [2022-11-25 18:26:09,649 INFO L137 encePairwiseOnDemand]: 358/362 looper letters, 72 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2022-11-25 18:26:09,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 361 flow [2022-11-25 18:26:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:26:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:26:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1006 transitions. [2022-11-25 18:26:09,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4631675874769797 [2022-11-25 18:26:09,653 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1006 transitions. [2022-11-25 18:26:09,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1006 transitions. [2022-11-25 18:26:09,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:09,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1006 transitions. [2022-11-25 18:26:09,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.66666666666666) internal successors, (1006), 6 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:09,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 362.0) internal successors, (2534), 7 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:09,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 362.0) internal successors, (2534), 7 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:09,661 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 156 flow. Second operand 6 states and 1006 transitions. [2022-11-25 18:26:09,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 361 flow [2022-11-25 18:26:09,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 353 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 18:26:09,666 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-11-25 18:26:09,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-11-25 18:26:09,667 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2022-11-25 18:26:09,667 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-11-25 18:26:09,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.875) internal successors, (1247), 8 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:09,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:09,668 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 18:26:09,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:26:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffe3e59-167f-4573-be02-738d265c5425/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:09,874 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)] === [2022-11-25 18:26:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1063421997, now seen corresponding path program 1 times [2022-11-25 18:26:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:09,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486029968] [2022-11-25 18:26:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:09,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:26:09,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:26:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:26:09,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:26:09,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:26:09,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:26:09,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 18:26:09,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 18:26:09,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 18:26:09,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 18:26:09,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 18:26:09,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 18:26:09,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:26:09,931 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:26:09,932 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:26:09,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 18:26:09,965 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 18:26:09,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-11-25 18:26:10,091 INFO L130 PetriNetUnfolder]: 81/684 cut-off events. [2022-11-25 18:26:10,091 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 18:26:10,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 684 events. 81/684 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2965 event pairs, 6 based on Foata normal form. 0/540 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2022-11-25 18:26:10,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 500 flow [2022-11-25 18:26:10,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 500 flow [2022-11-25 18:26:10,105 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:26:10,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 228 transitions, 500 flow [2022-11-25 18:26:10,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 228 transitions, 500 flow [2022-11-25 18:26:10,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-11-25 18:26:10,225 INFO L130 PetriNetUnfolder]: 81/684 cut-off events. [2022-11-25 18:26:10,225 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 18:26:10,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 684 events. 81/684 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2965 event pairs, 6 based on Foata normal form. 0/540 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2022-11-25 18:26:10,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 29568 [2022-11-25 18:26:15,676 INFO L134 LiptonReduction]: Checked pairs total: 63511 [2022-11-25 18:26:15,676 INFO L136 LiptonReduction]: Total number of compositions: 193 [2022-11-25 18:26:15,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:26:15,680 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;@597dc93c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:26:15,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:26:15,683 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 18:26:15,683 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:26:15,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:15,683 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:26:15,684 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)] === [2022-11-25 18:26:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash 53443, now seen corresponding path program 1 times [2022-11-25 18:26:15,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:15,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554683903] [2022-11-25 18:26:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:26:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554683903] [2022-11-25 18:26:15,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554683903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:15,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:15,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:26:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783973764] [2022-11-25 18:26:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:15,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:26:15,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:26:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:26:15,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2022-11-25 18:26:15,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:15,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:15,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2022-11-25 18:26:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand