./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:10:30,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:10:30,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:10:30,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:10:30,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:10:30,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:10:30,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:10:30,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:10:30,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:10:30,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:10:30,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:10:30,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:10:30,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:10:30,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:10:30,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:10:30,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:10:30,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:10:30,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:10:30,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:10:30,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:10:30,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:10:30,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:10:30,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:10:30,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:10:30,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:10:30,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:10:30,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:10:30,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:10:30,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:10:30,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:10:30,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:10:30,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:10:30,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:10:30,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:10:30,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:10:30,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:10:30,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:10:30,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:10:30,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:10:30,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:10:30,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:10:30,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:10:30,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:10:30,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:10:30,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:10:30,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:10:30,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:10:30,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:10:30,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:10:30,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:10:30,360 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:10:30,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:10:30,360 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:10:30,360 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:10:30,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:10:30,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:10:30,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:10:30,362 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:10:30,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:10:30,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:10:30,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:10:30,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:10:30,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:10:30,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:10:30,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:10:30,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:10:30,363 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:10:30,363 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:10:30,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:10:30,364 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:10:30,364 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_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-12-13 15:10:30,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:10:30,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:10:30,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:10:30,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:10:30,561 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:10:30,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-12-13 15:10:33,155 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:10:33,334 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:10:33,335 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-12-13 15:10:33,344 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/data/3dbaef513/b0af5b9742ed499f8de10dd148b34690/FLAGfc987cff7 [2022-12-13 15:10:33,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/data/3dbaef513/b0af5b9742ed499f8de10dd148b34690 [2022-12-13 15:10:33,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:10:33,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:10:33,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:10:33,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:10:33,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:10:33,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:10:33" (1/1) ... [2022-12-13 15:10:33,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16713911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:33, skipping insertion in model container [2022-12-13 15:10:33,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:10:33" (1/1) ... [2022-12-13 15:10:33,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:10:33,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:10:33,963 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_df13c4f5-809b-4ca1-9549-6cb5588c2be9/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-12-13 15:10:33,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:10:33,986 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:10:34,007 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_df13c4f5-809b-4ca1-9549-6cb5588c2be9/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-12-13 15:10:34,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:10:34,034 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:10:34,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34 WrapperNode [2022-12-13 15:10:34,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:10:34,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:10:34,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:10:34,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:10:34,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,064 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-12-13 15:10:34,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:10:34,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:10:34,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:10:34,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:10:34,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:10:34,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:10:34,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:10:34,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:10:34,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (1/1) ... [2022-12-13 15:10:34,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:10:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:10:34,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:10:34,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:10:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:10:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 15:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 15:10:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 15:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:10:34,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:10:34,144 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:10:34,246 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:10:34,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:10:34,452 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:10:34,458 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:10:34,458 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-13 15:10:34,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:10:34 BoogieIcfgContainer [2022-12-13 15:10:34,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:10:34,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:10:34,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:10:34,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:10:34,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:10:33" (1/3) ... [2022-12-13 15:10:34,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b86b4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:10:34, skipping insertion in model container [2022-12-13 15:10:34,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:10:34" (2/3) ... [2022-12-13 15:10:34,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b86b4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:10:34, skipping insertion in model container [2022-12-13 15:10:34,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:10:34" (3/3) ... [2022-12-13 15:10:34,469 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-12-13 15:10:34,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:10:34,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-12-13 15:10:34,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:10:34,548 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:10:34,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 119 transitions, 243 flow [2022-12-13 15:10:34,620 INFO L130 PetriNetUnfolder]: 14/157 cut-off events. [2022-12-13 15:10:34,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:10:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 14/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 433 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-12-13 15:10:34,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 119 transitions, 243 flow [2022-12-13 15:10:34,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 119 transitions, 243 flow [2022-12-13 15:10:34,633 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:10:34,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 119 transitions, 243 flow [2022-12-13 15:10:34,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 119 transitions, 243 flow [2022-12-13 15:10:34,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 119 transitions, 243 flow [2022-12-13 15:10:34,670 INFO L130 PetriNetUnfolder]: 14/157 cut-off events. [2022-12-13 15:10:34,671 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:10:34,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 14/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 433 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-12-13 15:10:34,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2022-12-13 15:10:37,128 INFO L134 LiptonReduction]: Checked pairs total: 7507 [2022-12-13 15:10:37,128 INFO L136 LiptonReduction]: Total number of compositions: 106 [2022-12-13 15:10:37,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:10:37,149 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;@51c0da1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:10:37,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-13 15:10:37,152 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 15:10:37,152 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:10:37,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:37,153 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:10:37,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 15:10:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash 14625, now seen corresponding path program 1 times [2022-12-13 15:10:37,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:37,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020876899] [2022-12-13 15:10:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:37,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:37,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020876899] [2022-12-13 15:10:37,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020876899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:37,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:37,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762302932] [2022-12-13 15:10:37,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:37,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:37,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 225 [2022-12-13 15:10:37,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:37,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 225 [2022-12-13 15:10:37,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:37,572 INFO L130 PetriNetUnfolder]: 156/394 cut-off events. [2022-12-13 15:10:37,572 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:10:37,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 394 events. 156/394 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1972 event pairs, 132 based on Foata normal form. 14/273 useless extension candidates. Maximal degree in co-relation 725. Up to 326 conditions per place. [2022-12-13 15:10:37,574 INFO L137 encePairwiseOnDemand]: 211/225 looper letters, 39 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-12-13 15:10:37,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 183 flow [2022-12-13 15:10:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2022-12-13 15:10:37,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5437037037037037 [2022-12-13 15:10:37,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2022-12-13 15:10:37,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2022-12-13 15:10:37,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:37,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2022-12-13 15:10:37,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,596 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 93 flow. Second operand 3 states and 367 transitions. [2022-12-13 15:10:37,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 183 flow [2022-12-13 15:10:37,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 183 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:10:37,600 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 83 flow [2022-12-13 15:10:37,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2022-12-13 15:10:37,604 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2022-12-13 15:10:37,604 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 83 flow [2022-12-13 15:10:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:37,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:10:37,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:10:37,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 15:10:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash 14624, now seen corresponding path program 1 times [2022-12-13 15:10:37,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:37,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876485479] [2022-12-13 15:10:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:37,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:37,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876485479] [2022-12-13 15:10:37,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876485479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:37,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:37,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368949900] [2022-12-13 15:10:37,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:37,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:37,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 225 [2022-12-13 15:10:37,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 83 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) [2022-12-13 15:10:37,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:37,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 225 [2022-12-13 15:10:37,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:37,760 INFO L130 PetriNetUnfolder]: 144/355 cut-off events. [2022-12-13 15:10:37,760 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 15:10:37,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 355 events. 144/355 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1756 event pairs, 108 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 715. Up to 240 conditions per place. [2022-12-13 15:10:37,761 INFO L137 encePairwiseOnDemand]: 222/225 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 15:10:37,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 181 flow [2022-12-13 15:10:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2022-12-13 15:10:37,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2022-12-13 15:10:37,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2022-12-13 15:10:37,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2022-12-13 15:10:37,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:37,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2022-12-13 15:10:37,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:37,769 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 83 flow. Second operand 3 states and 342 transitions. [2022-12-13 15:10:37,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 181 flow [2022-12-13 15:10:37,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:10:37,770 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 81 flow [2022-12-13 15:10:37,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-12-13 15:10:37,770 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2022-12-13 15:10:37,770 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 81 flow [2022-12-13 15:10:37,771 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) [2022-12-13 15:10:37,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:37,771 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:10:37,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:10:37,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 15:10:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 436045838, now seen corresponding path program 1 times [2022-12-13 15:10:37,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315208097] [2022-12-13 15:10:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:37,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:37,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315208097] [2022-12-13 15:10:37,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315208097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:10:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434031542] [2022-12-13 15:10:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:37,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:10:37,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:10:37,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:10:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:10:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:37,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:10:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:38,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:10:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:38,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434031542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:10:38,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:10:38,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 15:10:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702377769] [2022-12-13 15:10:38,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:10:38,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:10:38,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:10:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:10:38,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 225 [2022-12-13 15:10:38,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 100.71428571428571) internal successors, (705), 7 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:38,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:38,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 225 [2022-12-13 15:10:38,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:38,268 INFO L130 PetriNetUnfolder]: 24/80 cut-off events. [2022-12-13 15:10:38,268 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 15:10:38,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 80 events. 24/80 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 212 event pairs, 11 based on Foata normal form. 13/81 useless extension candidates. Maximal degree in co-relation 160. Up to 50 conditions per place. [2022-12-13 15:10:38,269 INFO L137 encePairwiseOnDemand]: 221/225 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-12-13 15:10:38,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 137 flow [2022-12-13 15:10:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:10:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:10:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 427 transitions. [2022-12-13 15:10:38,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47444444444444445 [2022-12-13 15:10:38,270 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 427 transitions. [2022-12-13 15:10:38,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 427 transitions. [2022-12-13 15:10:38,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:38,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 427 transitions. [2022-12-13 15:10:38,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:38,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:38,275 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:38,275 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 81 flow. Second operand 4 states and 427 transitions. [2022-12-13 15:10:38,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 137 flow [2022-12-13 15:10:38,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:10:38,276 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 54 flow [2022-12-13 15:10:38,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2022-12-13 15:10:38,277 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -10 predicate places. [2022-12-13 15:10:38,277 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 54 flow [2022-12-13 15:10:38,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.71428571428571) internal successors, (705), 7 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:38,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:38,277 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 15:10:38,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:10:38,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:38,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 15:10:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash 632519442, now seen corresponding path program 1 times [2022-12-13 15:10:38,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:38,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739546712] [2022-12-13 15:10:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:10:38,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:10:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:10:38,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:10:38,523 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:10:38,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2022-12-13 15:10:38,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-12-13 15:10:38,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-12-13 15:10:38,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-12-13 15:10:38,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-12-13 15:10:38,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (17 of 23 remaining) [2022-12-13 15:10:38,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 23 remaining) [2022-12-13 15:10:38,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-12-13 15:10:38,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-12-13 15:10:38,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2022-12-13 15:10:38,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2022-12-13 15:10:38,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2022-12-13 15:10:38,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-12-13 15:10:38,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-12-13 15:10:38,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2022-12-13 15:10:38,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2022-12-13 15:10:38,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-12-13 15:10:38,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-12-13 15:10:38,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-12-13 15:10:38,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-12-13 15:10:38,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2022-12-13 15:10:38,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-12-13 15:10:38,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-12-13 15:10:38,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:10:38,530 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 15:10:38,532 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:10:38,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:10:38,553 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:10:38,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 160 transitions, 332 flow [2022-12-13 15:10:38,585 INFO L130 PetriNetUnfolder]: 24/241 cut-off events. [2022-12-13 15:10:38,585 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:10:38,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 241 events. 24/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 810 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 158. Up to 6 conditions per place. [2022-12-13 15:10:38,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 160 transitions, 332 flow [2022-12-13 15:10:38,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 160 transitions, 332 flow [2022-12-13 15:10:38,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:10:38,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 160 transitions, 332 flow [2022-12-13 15:10:38,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 160 transitions, 332 flow [2022-12-13 15:10:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 160 transitions, 332 flow [2022-12-13 15:10:38,617 INFO L130 PetriNetUnfolder]: 24/241 cut-off events. [2022-12-13 15:10:38,617 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:10:38,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 241 events. 24/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 810 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 158. Up to 6 conditions per place. [2022-12-13 15:10:38,628 INFO L119 LiptonReduction]: Number of co-enabled transitions 10320 [2022-12-13 15:10:41,328 INFO L134 LiptonReduction]: Checked pairs total: 25678 [2022-12-13 15:10:41,328 INFO L136 LiptonReduction]: Total number of compositions: 139 [2022-12-13 15:10:41,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:10:41,331 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;@51c0da1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:10:41,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-12-13 15:10:41,332 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 15:10:41,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:10:41,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:41,332 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:10:41,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 15:10:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash 25506, now seen corresponding path program 1 times [2022-12-13 15:10:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804404335] [2022-12-13 15:10:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804404335] [2022-12-13 15:10:41,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804404335] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:41,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:41,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380467427] [2022-12-13 15:10:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:41,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:41,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2022-12-13 15:10:41,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:41,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:41,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2022-12-13 15:10:41,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:42,107 INFO L130 PetriNetUnfolder]: 5083/8703 cut-off events. [2022-12-13 15:10:42,107 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-13 15:10:42,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16805 conditions, 8703 events. 5083/8703 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 62586 event pairs, 2366 based on Foata normal form. 406/6265 useless extension candidates. Maximal degree in co-relation 1952. Up to 8010 conditions per place. [2022-12-13 15:10:42,140 INFO L137 encePairwiseOnDemand]: 277/299 looper letters, 56 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2022-12-13 15:10:42,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 266 flow [2022-12-13 15:10:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2022-12-13 15:10:42,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2022-12-13 15:10:42,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2022-12-13 15:10:42,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2022-12-13 15:10:42,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:42,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2022-12-13 15:10:42,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,144 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) [2022-12-13 15:10:42,145 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) [2022-12-13 15:10:42,145 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 154 flow. Second operand 3 states and 494 transitions. [2022-12-13 15:10:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 266 flow [2022-12-13 15:10:42,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 264 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 15:10:42,147 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 130 flow [2022-12-13 15:10:42,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2022-12-13 15:10:42,148 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2022-12-13 15:10:42,148 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 130 flow [2022-12-13 15:10:42,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:42,149 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:10:42,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:10:42,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 15:10:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:42,149 INFO L85 PathProgramCache]: Analyzing trace with hash 25508, now seen corresponding path program 1 times [2022-12-13 15:10:42,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:42,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558021793] [2022-12-13 15:10:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:42,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:42,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:42,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558021793] [2022-12-13 15:10:42,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558021793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:42,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:42,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181846619] [2022-12-13 15:10:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:42,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2022-12-13 15:10:42,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:42,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2022-12-13 15:10:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:42,942 INFO L130 PetriNetUnfolder]: 4706/7860 cut-off events. [2022-12-13 15:10:42,943 INFO L131 PetriNetUnfolder]: For 454/454 co-relation queries the response was YES. [2022-12-13 15:10:42,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15998 conditions, 7860 events. 4706/7860 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 55873 event pairs, 3575 based on Foata normal form. 0/5607 useless extension candidates. Maximal degree in co-relation 15896. Up to 5677 conditions per place. [2022-12-13 15:10:42,981 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 66 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-12-13 15:10:42,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 316 flow [2022-12-13 15:10:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-12-13 15:10:42,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5273132664437012 [2022-12-13 15:10:42,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-12-13 15:10:42,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-12-13 15:10:42,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:42,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-12-13 15:10:42,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,998 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) [2022-12-13 15:10:42,999 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) [2022-12-13 15:10:42,999 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 130 flow. Second operand 3 states and 473 transitions. [2022-12-13 15:10:42,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 316 flow [2022-12-13 15:10:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:10:43,001 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 130 flow [2022-12-13 15:10:43,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2022-12-13 15:10:43,002 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2022-12-13 15:10:43,002 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 130 flow [2022-12-13 15:10:43,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:43,003 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:10:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:10:43,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 15:10:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2100837894, now seen corresponding path program 1 times [2022-12-13 15:10:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715467625] [2022-12-13 15:10:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:43,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:43,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715467625] [2022-12-13 15:10:43,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715467625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:43,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:43,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:10:43,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001779172] [2022-12-13 15:10:43,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:10:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:10:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:10:43,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 299 [2022-12-13 15:10:43,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:43,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 299 [2022-12-13 15:10:43,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:43,613 INFO L130 PetriNetUnfolder]: 3432/5829 cut-off events. [2022-12-13 15:10:43,613 INFO L131 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2022-12-13 15:10:43,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11965 conditions, 5829 events. 3432/5829 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 39409 event pairs, 2882 based on Foata normal form. 325/4623 useless extension candidates. Maximal degree in co-relation 9197. Up to 4600 conditions per place. [2022-12-13 15:10:43,634 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 57 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2022-12-13 15:10:43,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 286 flow [2022-12-13 15:10:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:10:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:10:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2022-12-13 15:10:43,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4874581939799331 [2022-12-13 15:10:43,636 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2022-12-13 15:10:43,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2022-12-13 15:10:43,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:43,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2022-12-13 15:10:43,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,640 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,640 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 130 flow. Second operand 4 states and 583 transitions. [2022-12-13 15:10:43,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 286 flow [2022-12-13 15:10:43,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:10:43,645 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 124 flow [2022-12-13 15:10:43,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-12-13 15:10:43,646 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2022-12-13 15:10:43,646 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 124 flow [2022-12-13 15:10:43,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:43,647 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:10:43,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:10:43,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 15:10:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2100623895, now seen corresponding path program 1 times [2022-12-13 15:10:43,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:43,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253234600] [2022-12-13 15:10:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:43,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:43,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:43,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253234600] [2022-12-13 15:10:43,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253234600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:10:43,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438300021] [2022-12-13 15:10:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:43,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:43,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:10:43,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:10:43,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:10:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:10:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:43,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:10:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:43,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:10:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:43,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438300021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:10:43,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:10:43,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 15:10:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522160383] [2022-12-13 15:10:43,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:10:43,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:10:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:10:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:10:43,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 299 [2022-12-13 15:10:43,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 134.71428571428572) internal successors, (943), 7 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:43,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 299 [2022-12-13 15:10:43,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:44,382 INFO L130 PetriNetUnfolder]: 3058/5156 cut-off events. [2022-12-13 15:10:44,382 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-12-13 15:10:44,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10758 conditions, 5156 events. 3058/5156 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 35524 event pairs, 130 based on Foata normal form. 12/4002 useless extension candidates. Maximal degree in co-relation 8828. Up to 3672 conditions per place. [2022-12-13 15:10:44,395 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 89 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2022-12-13 15:10:44,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 422 flow [2022-12-13 15:10:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:10:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:10:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 762 transitions. [2022-12-13 15:10:44,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5096989966555184 [2022-12-13 15:10:44,397 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 762 transitions. [2022-12-13 15:10:44,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 762 transitions. [2022-12-13 15:10:44,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:44,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 762 transitions. [2022-12-13 15:10:44,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:44,401 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) [2022-12-13 15:10:44,401 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) [2022-12-13 15:10:44,401 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 124 flow. Second operand 5 states and 762 transitions. [2022-12-13 15:10:44,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 422 flow [2022-12-13 15:10:44,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:10:44,414 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 130 flow [2022-12-13 15:10:44,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2022-12-13 15:10:44,414 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2022-12-13 15:10:44,415 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 130 flow [2022-12-13 15:10:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.71428571428572) internal successors, (943), 7 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:44,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:44,415 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:44,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:10:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:44,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 15:10:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 701461040, now seen corresponding path program 1 times [2022-12-13 15:10:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497233607] [2022-12-13 15:10:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497233607] [2022-12-13 15:10:44,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497233607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:44,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:44,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:10:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646740580] [2022-12-13 15:10:44,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:44,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:10:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:10:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:10:44,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2022-12-13 15:10:44,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:44,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:44,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2022-12-13 15:10:44,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:45,201 INFO L130 PetriNetUnfolder]: 3050/5174 cut-off events. [2022-12-13 15:10:45,202 INFO L131 PetriNetUnfolder]: For 929/929 co-relation queries the response was YES. [2022-12-13 15:10:45,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12170 conditions, 5174 events. 3050/5174 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 32241 event pairs, 1788 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 9495. Up to 2480 conditions per place. [2022-12-13 15:10:45,217 INFO L137 encePairwiseOnDemand]: 281/299 looper letters, 69 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2022-12-13 15:10:45,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 370 flow [2022-12-13 15:10:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:10:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:10:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2022-12-13 15:10:45,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47324414715719065 [2022-12-13 15:10:45,219 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2022-12-13 15:10:45,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2022-12-13 15:10:45,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:45,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2022-12-13 15:10:45,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:45,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:45,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:45,223 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 130 flow. Second operand 4 states and 566 transitions. [2022-12-13 15:10:45,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 370 flow [2022-12-13 15:10:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 356 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 15:10:45,234 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 224 flow [2022-12-13 15:10:45,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-12-13 15:10:45,234 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2022-12-13 15:10:45,235 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 224 flow [2022-12-13 15:10:45,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:45,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:45,235 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 15:10:45,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:10:45,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 15:10:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1957130873, now seen corresponding path program 1 times [2022-12-13 15:10:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:45,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494004253] [2022-12-13 15:10:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:45,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:10:45,247 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:10:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:10:45,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:10:45,257 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:10:45,257 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2022-12-13 15:10:45,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (25 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2022-12-13 15:10:45,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2022-12-13 15:10:45,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2022-12-13 15:10:45,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2022-12-13 15:10:45,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2022-12-13 15:10:45,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:10:45,262 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 15:10:45,263 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:10:45,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 15:10:45,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:10:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 201 transitions, 423 flow [2022-12-13 15:10:45,315 INFO L130 PetriNetUnfolder]: 34/325 cut-off events. [2022-12-13 15:10:45,316 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:10:45,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 325 events. 34/325 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2022-12-13 15:10:45,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 201 transitions, 423 flow [2022-12-13 15:10:45,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 201 transitions, 423 flow [2022-12-13 15:10:45,320 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:10:45,320 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 201 transitions, 423 flow [2022-12-13 15:10:45,320 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 201 transitions, 423 flow [2022-12-13 15:10:45,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 201 transitions, 423 flow [2022-12-13 15:10:45,353 INFO L130 PetriNetUnfolder]: 34/325 cut-off events. [2022-12-13 15:10:45,353 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:10:45,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 325 events. 34/325 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2022-12-13 15:10:45,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 20400 [2022-12-13 15:10:48,223 INFO L134 LiptonReduction]: Checked pairs total: 55337 [2022-12-13 15:10:48,223 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-12-13 15:10:48,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:10:48,225 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;@51c0da1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:10:48,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 15:10:48,226 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 15:10:48,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:10:48,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:48,226 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:10:48,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 15:10:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash 38651, now seen corresponding path program 1 times [2022-12-13 15:10:48,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:48,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181168432] [2022-12-13 15:10:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:48,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:48,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181168432] [2022-12-13 15:10:48,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181168432] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:48,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:48,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798314613] [2022-12-13 15:10:48,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:48,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:48,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:48,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 370 [2022-12-13 15:10:48,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:48,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:48,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 370 [2022-12-13 15:10:48,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:57,283 INFO L130 PetriNetUnfolder]: 101530/144879 cut-off events. [2022-12-13 15:10:57,283 INFO L131 PetriNetUnfolder]: For 1345/1345 co-relation queries the response was YES. [2022-12-13 15:10:57,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285800 conditions, 144879 events. 101530/144879 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 4738. Compared 1157165 event pairs, 77467 based on Foata normal form. 8021/107584 useless extension candidates. Maximal degree in co-relation 41573. Up to 107016 conditions per place. [2022-12-13 15:10:57,826 INFO L137 encePairwiseOnDemand]: 341/370 looper letters, 92 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-12-13 15:10:57,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 109 transitions, 427 flow [2022-12-13 15:10:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-12-13 15:10:57,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5873873873873874 [2022-12-13 15:10:57,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-12-13 15:10:57,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-12-13 15:10:57,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:57,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-12-13 15:10:57,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:57,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:57,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:57,832 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 215 flow. Second operand 3 states and 652 transitions. [2022-12-13 15:10:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 109 transitions, 427 flow [2022-12-13 15:10:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 421 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 15:10:57,835 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 159 flow [2022-12-13 15:10:57,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2022-12-13 15:10:57,835 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2022-12-13 15:10:57,835 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 159 flow [2022-12-13 15:10:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:57,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:57,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:10:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:10:57,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 15:10:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 38650, now seen corresponding path program 1 times [2022-12-13 15:10:57,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:57,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347668156] [2022-12-13 15:10:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:57,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347668156] [2022-12-13 15:10:57,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347668156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:57,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:57,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:57,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409693521] [2022-12-13 15:10:57,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:57,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:57,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:57,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 370 [2022-12-13 15:10:57,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:57,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:57,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 370 [2022-12-13 15:10:57,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:07,755 INFO L130 PetriNetUnfolder]: 101530/146953 cut-off events. [2022-12-13 15:11:07,755 INFO L131 PetriNetUnfolder]: For 3402/3402 co-relation queries the response was YES. [2022-12-13 15:11:07,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290536 conditions, 146953 events. 101530/146953 cut-off events. For 3402/3402 co-relation queries the response was YES. Maximal size of possible extension queue 4745. Compared 1180621 event pairs, 65884 based on Foata normal form. 0/101358 useless extension candidates. Maximal degree in co-relation 220211. Up to 139919 conditions per place. [2022-12-13 15:11:08,547 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 68 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-12-13 15:11:08,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 329 flow [2022-12-13 15:11:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:11:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:11:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2022-12-13 15:11:08,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5243243243243243 [2022-12-13 15:11:08,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2022-12-13 15:11:08,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2022-12-13 15:11:08,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:08,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2022-12-13 15:11:08,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:08,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:08,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:08,552 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 159 flow. Second operand 3 states and 582 transitions. [2022-12-13 15:11:08,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 329 flow [2022-12-13 15:11:08,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:11:08,629 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 169 flow [2022-12-13 15:11:08,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-12-13 15:11:08,630 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2022-12-13 15:11:08,630 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 169 flow [2022-12-13 15:11:08,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:08,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:08,630 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:11:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:11:08,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 15:11:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1367065892, now seen corresponding path program 1 times [2022-12-13 15:11:08,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:08,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984587940] [2022-12-13 15:11:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:08,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:11:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984587940] [2022-12-13 15:11:08,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984587940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:11:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890782310] [2022-12-13 15:11:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:08,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:11:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:11:08,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:11:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:11:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:08,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:11:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:11:08,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:11:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:08,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:11:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:08,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890782310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:11:08,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:11:08,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 15:11:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799627761] [2022-12-13 15:11:08,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:11:08,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:11:08,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:11:08,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:11:08,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:11:09,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 370 [2022-12-13 15:11:09,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 169 flow. Second operand has 8 states, 8 states have (on average 167.875) internal successors, (1343), 8 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:09,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:09,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 370 [2022-12-13 15:11:09,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:11,150 INFO L130 PetriNetUnfolder]: 21320/33983 cut-off events. [2022-12-13 15:11:11,150 INFO L131 PetriNetUnfolder]: For 3164/3164 co-relation queries the response was YES. [2022-12-13 15:11:11,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70519 conditions, 33983 events. 21320/33983 cut-off events. For 3164/3164 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 273089 event pairs, 0 based on Foata normal form. 2954/29966 useless extension candidates. Maximal degree in co-relation 7650. Up to 20776 conditions per place. [2022-12-13 15:11:11,268 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 124 selfloop transitions, 4 changer transitions 0/142 dead transitions. [2022-12-13 15:11:11,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 142 transitions, 565 flow [2022-12-13 15:11:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:11:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:11:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1130 transitions. [2022-12-13 15:11:11,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.509009009009009 [2022-12-13 15:11:11,270 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1130 transitions. [2022-12-13 15:11:11,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1130 transitions. [2022-12-13 15:11:11,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:11,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1130 transitions. [2022-12-13 15:11:11,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.33333333333334) internal successors, (1130), 6 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:11,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:11,274 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:11,274 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 169 flow. Second operand 6 states and 1130 transitions. [2022-12-13 15:11:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 142 transitions, 565 flow [2022-12-13 15:11:11,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 563 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:11:11,276 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 153 flow [2022-12-13 15:11:11,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2022-12-13 15:11:11,277 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2022-12-13 15:11:11,277 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 153 flow [2022-12-13 15:11:11,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.875) internal successors, (1343), 8 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:11,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:11,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:11:11,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:11:11,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df13c4f5-809b-4ca1-9549-6cb5588c2be9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:11:11,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 15:11:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1367364863, now seen corresponding path program 1 times [2022-12-13 15:11:11,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:11,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574186369] [2022-12-13 15:11:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:11,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:11:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574186369] [2022-12-13 15:11:11,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574186369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:11:11,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:11:11,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:11:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371468816] [2022-12-13 15:11:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:11:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:11:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:11:11,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:11:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:11:11,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 370 [2022-12-13 15:11:11,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:11,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:11,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 370 [2022-12-13 15:11:11,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:12,793 INFO L130 PetriNetUnfolder]: 13354/20087 cut-off events. [2022-12-13 15:11:12,794 INFO L131 PetriNetUnfolder]: For 6110/6110 co-relation queries the response was YES. [2022-12-13 15:11:12,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43372 conditions, 20087 events. 13354/20087 cut-off events. For 6110/6110 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 136688 event pairs, 13354 based on Foata normal form. 1371/17542 useless extension candidates. Maximal degree in co-relation 32080. Up to 19008 conditions per place. [2022-12-13 15:11:12,878 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 40 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-12-13 15:11:12,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 223 flow [2022-12-13 15:11:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:11:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:11:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-12-13 15:11:12,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2022-12-13 15:11:12,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-12-13 15:11:12,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-12-13 15:11:12,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:12,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-12-13 15:11:12,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:12,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:12,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:12,882 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 153 flow. Second operand 3 states and 522 transitions. [2022-12-13 15:11:12,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 223 flow [2022-12-13 15:11:12,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 214 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 15:11:12,889 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 134 flow [2022-12-13 15:11:12,890 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2022-12-13 15:11:12,890 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -18 predicate places. [2022-12-13 15:11:12,890 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 134 flow [2022-12-13 15:11:12,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:12,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:12,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:11:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:11:12,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 15:11:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -561365520, now seen corresponding path program 1 times [2022-12-13 15:11:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361708071] [2022-12-13 15:11:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:11:12,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361708071] [2022-12-13 15:11:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361708071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:11:12,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:11:12,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:11:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297446468] [2022-12-13 15:11:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:11:12,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:11:12,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:11:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:11:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:11:13,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 370 [2022-12-13 15:11:13,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:13,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:13,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 370 [2022-12-13 15:11:13,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:13,727 INFO L130 PetriNetUnfolder]: 7668/11475 cut-off events. [2022-12-13 15:11:13,727 INFO L131 PetriNetUnfolder]: For 1432/1432 co-relation queries the response was YES. [2022-12-13 15:11:13,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23943 conditions, 11475 events. 7668/11475 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 67746 event pairs, 7668 based on Foata normal form. 0/11396 useless extension candidates. Maximal degree in co-relation 23933. Up to 11000 conditions per place. [2022-12-13 15:11:13,762 INFO L137 encePairwiseOnDemand]: 357/370 looper letters, 34 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-12-13 15:11:13,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 43 transitions, 180 flow [2022-12-13 15:11:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:11:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:11:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2022-12-13 15:11:13,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4297297297297297 [2022-12-13 15:11:13,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2022-12-13 15:11:13,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2022-12-13 15:11:13,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:13,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2022-12-13 15:11:13,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:13,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:13,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:13,766 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 134 flow. Second operand 3 states and 477 transitions. [2022-12-13 15:11:13,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 43 transitions, 180 flow [2022-12-13 15:11:13,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 43 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:11:13,767 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 111 flow [2022-12-13 15:11:13,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 15:11:13,767 INFO L288 CegarLoopForPetriNet]: 84 programPoint places, -29 predicate places. [2022-12-13 15:11:13,767 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 111 flow [2022-12-13 15:11:13,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:13,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:13,768 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 15:11:13,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 15:11:13,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 15:11:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 195018424, now seen corresponding path program 1 times [2022-12-13 15:11:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025167345] [2022-12-13 15:11:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:11:13,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:11:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:11:13,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:11:13,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-12-13 15:11:13,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-12-13 15:11:13,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-12-13 15:11:13,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2022-12-13 15:11:13,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:11:13,788 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 15:11:13,788 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:11:13,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 15:11:13,807 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:11:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 242 transitions, 516 flow [2022-12-13 15:11:13,845 INFO L130 PetriNetUnfolder]: 44/409 cut-off events. [2022-12-13 15:11:13,846 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:11:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 409 events. 44/409 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1530 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 333. Up to 10 conditions per place. [2022-12-13 15:11:13,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 242 transitions, 516 flow [2022-12-13 15:11:13,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 242 transitions, 516 flow [2022-12-13 15:11:13,851 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:11:13,851 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 242 transitions, 516 flow [2022-12-13 15:11:13,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 242 transitions, 516 flow [2022-12-13 15:11:13,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 242 transitions, 516 flow [2022-12-13 15:11:13,886 INFO L130 PetriNetUnfolder]: 44/409 cut-off events. [2022-12-13 15:11:13,886 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:11:13,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 409 events. 44/409 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1530 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 333. Up to 10 conditions per place. [2022-12-13 15:11:13,898 INFO L119 LiptonReduction]: Number of co-enabled transitions 33760 [2022-12-13 15:11:16,948 INFO L134 LiptonReduction]: Checked pairs total: 95353 [2022-12-13 15:11:16,948 INFO L136 LiptonReduction]: Total number of compositions: 197 [2022-12-13 15:11:16,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:11:16,949 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51c0da1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:11:16,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-12-13 15:11:16,950 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 15:11:16,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:11:16,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:16,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:11:16,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 15:11:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:16,951 INFO L85 PathProgramCache]: Analyzing trace with hash 54005, now seen corresponding path program 1 times [2022-12-13 15:11:16,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:16,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062904061] [2022-12-13 15:11:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:16,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:11:16,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062904061] [2022-12-13 15:11:16,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062904061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:11:16,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:11:16,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:11:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475225429] [2022-12-13 15:11:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:11:16,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:11:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:11:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:11:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:11:17,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 439 [2022-12-13 15:11:17,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:17,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:17,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 439 [2022-12-13 15:11:17,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand