./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.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_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/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_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/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_19fd79ba-10dc-4476-98a5-1da70442e42f/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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- 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 14:39:52,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:39:52,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:39:52,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:39:52,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:39:52,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:39:52,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:39:52,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:39:52,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:39:52,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:39:52,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:39:52,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:39:52,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:39:52,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:39:52,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:39:52,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:39:52,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:39:52,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:39:52,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:39:52,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:39:52,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:39:52,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:39:52,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:39:52,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:39:52,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:39:52,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:39:52,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:39:52,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:39:52,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:39:52,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:39:52,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:39:52,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:39:52,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:39:52,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:39:52,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:39:52,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:39:52,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:39:52,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:39:52,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:39:52,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:39:52,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:39:52,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:39:52,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:39:52,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:39:52,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:39:52,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:39:52,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:39:52,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:39:52,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:39:52,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:39:52,413 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:39:52,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:39:52,414 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:39:52,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:39:52,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:39:52,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:39:52,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:39:52,414 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:39:52,415 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:39:52,415 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:39:52,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:39:52,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:39:52,415 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:39:52,415 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:39:52,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:39:52,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:39:52,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:39:52,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:39:52,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:39:52,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:39:52,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:39:52,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:39:52,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:39:52,417 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:39:52,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:39:52,417 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:39:52,417 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_19fd79ba-10dc-4476-98a5-1da70442e42f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2022-12-13 14:39:52,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:39:52,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:39:52,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:39:52,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:39:52,638 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:39:52,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-12-13 14:39:55,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:39:55,356 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:39:55,356 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-12-13 14:39:55,365 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/data/2ae7757c6/ea655cb63870481eabcb29ac85c88b4c/FLAGfdd4ebae3 [2022-12-13 14:39:55,376 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/data/2ae7757c6/ea655cb63870481eabcb29ac85c88b4c [2022-12-13 14:39:55,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:39:55,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:39:55,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:39:55,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:39:55,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:39:55,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e313cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55, skipping insertion in model container [2022-12-13 14:39:55,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:39:55,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:39:55,737 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_19fd79ba-10dc-4476-98a5-1da70442e42f/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-12-13 14:39:55,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:39:55,767 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:39:55,792 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_19fd79ba-10dc-4476-98a5-1da70442e42f/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-12-13 14:39:55,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:39:55,843 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:39:55,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55 WrapperNode [2022-12-13 14:39:55,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:39:55,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:39:55,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:39:55,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:39:55,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,879 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 193 [2022-12-13 14:39:55,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:39:55,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:39:55,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:39:55,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:39:55,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:39:55,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:39:55,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:39:55,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:39:55,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (1/1) ... [2022-12-13 14:39:55,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:39:55,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:39:55,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:39:55,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:39:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:39:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:39:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:39:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:39:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:39:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:39:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:39:55,956 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:39:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:39:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:39:55,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:39:55,957 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 14:39:56,077 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:39:56,079 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:39:56,345 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:39:56,353 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:39:56,353 INFO L300 CfgBuilder]: Removed 25 assume(true) statements. [2022-12-13 14:39:56,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:39:56 BoogieIcfgContainer [2022-12-13 14:39:56,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:39:56,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:39:56,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:39:56,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:39:56,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:39:55" (1/3) ... [2022-12-13 14:39:56,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbc84bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:39:56, skipping insertion in model container [2022-12-13 14:39:56,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:39:55" (2/3) ... [2022-12-13 14:39:56,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbc84bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:39:56, skipping insertion in model container [2022-12-13 14:39:56,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:39:56" (3/3) ... [2022-12-13 14:39:56,363 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2022-12-13 14:39:56,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:39:56,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-12-13 14:39:56,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:39:56,444 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 14:39:56,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2022-12-13 14:39:56,573 INFO L130 PetriNetUnfolder]: 49/329 cut-off events. [2022-12-13 14:39:56,573 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:39:56,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 329 events. 49/329 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1384 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2022-12-13 14:39:56,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 228 transitions, 464 flow [2022-12-13 14:39:56,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 228 transitions, 464 flow [2022-12-13 14:39:56,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:39:56,598 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 228 transitions, 464 flow [2022-12-13 14:39:56,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 228 transitions, 464 flow [2022-12-13 14:39:56,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2022-12-13 14:39:56,645 INFO L130 PetriNetUnfolder]: 49/329 cut-off events. [2022-12-13 14:39:56,645 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:39:56,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 329 events. 49/329 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1384 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2022-12-13 14:39:56,654 INFO L119 LiptonReduction]: Number of co-enabled transitions 17334 [2022-12-13 14:39:59,430 INFO L134 LiptonReduction]: Checked pairs total: 32512 [2022-12-13 14:39:59,430 INFO L136 LiptonReduction]: Total number of compositions: 201 [2022-12-13 14:39:59,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:39:59,450 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;@5efb09b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:39:59,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 14:39:59,452 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-12-13 14:39:59,452 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:39:59,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:39:59,453 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:39:59,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:39:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash 896419, now seen corresponding path program 1 times [2022-12-13 14:39:59,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:39:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061504170] [2022-12-13 14:39:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:39:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:39:59,610 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 14:39:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:39:59,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061504170] [2022-12-13 14:39:59,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061504170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:39:59,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:39:59,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:39:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911658454] [2022-12-13 14:39:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:39:59,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:39:59,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:39:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:39:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:39:59,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 429 [2022-12-13 14:39:59,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 100 transitions, 208 flow. Second operand has 3 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 14:39:59,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:39:59,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 429 [2022-12-13 14:39:59,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:39:59,870 INFO L130 PetriNetUnfolder]: 706/1593 cut-off events. [2022-12-13 14:39:59,870 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:39:59,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2945 conditions, 1593 events. 706/1593 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10347 event pairs, 600 based on Foata normal form. 137/1229 useless extension candidates. Maximal degree in co-relation 2859. Up to 1345 conditions per place. [2022-12-13 14:39:59,880 INFO L137 encePairwiseOnDemand]: 398/429 looper letters, 57 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2022-12-13 14:39:59,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 270 flow [2022-12-13 14:39:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:39:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:39:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-12-13 14:39:59,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5182595182595182 [2022-12-13 14:39:59,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-12-13 14:39:59,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-12-13 14:39:59,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:39:59,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-12-13 14:39:59,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 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 14:39:59,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 14:39:59,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 14:39:59,911 INFO L175 Difference]: Start difference. First operand has 75 places, 100 transitions, 208 flow. Second operand 3 states and 667 transitions. [2022-12-13 14:39:59,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 270 flow [2022-12-13 14:39:59,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:39:59,915 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 162 flow [2022-12-13 14:39:59,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2022-12-13 14:39:59,919 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2022-12-13 14:39:59,919 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 162 flow [2022-12-13 14:39:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 14:39:59,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:39:59,920 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:39:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:39:59,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:39:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash 27800575, now seen corresponding path program 1 times [2022-12-13 14:39:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:39:59,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088898888] [2022-12-13 14:39:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:39:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:39:59,992 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 14:39:59,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:39:59,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088898888] [2022-12-13 14:39:59,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088898888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:39:59,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784605569] [2022-12-13 14:39:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:59,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:39:59,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:39:59,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:40:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:40:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:00,088 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 14:40:00,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:00,101 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 14:40:00,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784605569] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:00,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:00,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:40:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217681749] [2022-12-13 14:40:00,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:00,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:40:00,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:40:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:40:00,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2022-12-13 14:40:00,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 193.28571428571428) internal successors, (1353), 7 states have internal predecessors, (1353), 0 states have call successors, (0), 0 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 14:40:00,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:00,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2022-12-13 14:40:00,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:00,404 INFO L130 PetriNetUnfolder]: 706/1596 cut-off events. [2022-12-13 14:40:00,404 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:40:00,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 1596 events. 706/1596 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10340 event pairs, 600 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 2949. Up to 1345 conditions per place. [2022-12-13 14:40:00,410 INFO L137 encePairwiseOnDemand]: 426/429 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2022-12-13 14:40:00,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 298 flow [2022-12-13 14:40:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:40:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:40:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1217 transitions. [2022-12-13 14:40:00,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4728049728049728 [2022-12-13 14:40:00,416 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1217 transitions. [2022-12-13 14:40:00,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1217 transitions. [2022-12-13 14:40:00,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:00,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1217 transitions. [2022-12-13 14:40:00,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 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 14:40:00,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 429.0) internal successors, (3003), 7 states have internal predecessors, (3003), 0 states have call successors, (0), 0 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 14:40:00,435 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 429.0) internal successors, (3003), 7 states have internal predecessors, (3003), 0 states have call successors, (0), 0 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 14:40:00,435 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 162 flow. Second operand 6 states and 1217 transitions. [2022-12-13 14:40:00,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 298 flow [2022-12-13 14:40:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 294 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:40:00,439 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 194 flow [2022-12-13 14:40:00,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2022-12-13 14:40:00,440 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2022-12-13 14:40:00,441 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 194 flow [2022-12-13 14:40:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.28571428571428) internal successors, (1353), 7 states have internal predecessors, (1353), 0 states have call successors, (0), 0 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 14:40:00,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:00,443 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 14:40:00,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:40:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:00,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:40:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash -710253405, now seen corresponding path program 2 times [2022-12-13 14:40:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:00,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289350225] [2022-12-13 14:40:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:40:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:00,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289350225] [2022-12-13 14:40:00,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289350225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:00,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:00,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:40:00,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117793468] [2022-12-13 14:40:00,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:40:00,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:40:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:40:00,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 429 [2022-12-13 14:40:00,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 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 14:40:00,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:00,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 429 [2022-12-13 14:40:00,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:01,086 INFO L130 PetriNetUnfolder]: 660/1478 cut-off events. [2022-12-13 14:40:01,086 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:40:01,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1478 events. 660/1478 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9439 event pairs, 520 based on Foata normal form. 0/1031 useless extension candidates. Maximal degree in co-relation 2736. Up to 1170 conditions per place. [2022-12-13 14:40:01,096 INFO L137 encePairwiseOnDemand]: 424/429 looper letters, 78 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2022-12-13 14:40:01,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 394 flow [2022-12-13 14:40:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:40:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:40:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2022-12-13 14:40:01,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5019425019425019 [2022-12-13 14:40:01,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2022-12-13 14:40:01,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2022-12-13 14:40:01,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:01,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2022-12-13 14:40:01,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:01,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 14:40:01,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 14:40:01,102 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 194 flow. Second operand 3 states and 646 transitions. [2022-12-13 14:40:01,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 394 flow [2022-12-13 14:40:01,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 94 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:40:01,103 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 182 flow [2022-12-13 14:40:01,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2022-12-13 14:40:01,104 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2022-12-13 14:40:01,104 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 182 flow [2022-12-13 14:40:01,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 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 14:40:01,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:01,105 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 14:40:01,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:40:01,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:40:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -710253404, now seen corresponding path program 1 times [2022-12-13 14:40:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000115424] [2022-12-13 14:40:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:40:01,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000115424] [2022-12-13 14:40:01,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000115424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:01,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372325753] [2022-12-13 14:40:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:01,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:01,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:01,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:40:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:40:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:40:01,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:40:01,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372325753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:01,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:01,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 14:40:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448977599] [2022-12-13 14:40:01,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:01,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:40:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:40:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:40:01,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2022-12-13 14:40:01,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 193.15384615384616) internal successors, (2511), 13 states have internal predecessors, (2511), 0 states have call successors, (0), 0 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 14:40:01,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:01,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2022-12-13 14:40:01,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:01,503 INFO L130 PetriNetUnfolder]: 662/1500 cut-off events. [2022-12-13 14:40:01,503 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-12-13 14:40:01,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 1500 events. 662/1500 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9532 event pairs, 560 based on Foata normal form. 6/1084 useless extension candidates. Maximal degree in co-relation 2797. Up to 1259 conditions per place. [2022-12-13 14:40:01,510 INFO L137 encePairwiseOnDemand]: 426/429 looper letters, 55 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2022-12-13 14:40:01,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 350 flow [2022-12-13 14:40:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:40:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:40:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2376 transitions. [2022-12-13 14:40:01,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-12-13 14:40:01,517 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2376 transitions. [2022-12-13 14:40:01,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2376 transitions. [2022-12-13 14:40:01,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:01,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2376 transitions. [2022-12-13 14:40:01,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 0 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 14:40:01,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 429.0) internal successors, (5577), 13 states have internal predecessors, (5577), 0 states have call successors, (0), 0 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 14:40:01,535 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 429.0) internal successors, (5577), 13 states have internal predecessors, (5577), 0 states have call successors, (0), 0 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 14:40:01,535 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 182 flow. Second operand 12 states and 2376 transitions. [2022-12-13 14:40:01,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 350 flow [2022-12-13 14:40:01,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:40:01,538 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 260 flow [2022-12-13 14:40:01,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=260, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2022-12-13 14:40:01,539 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 17 predicate places. [2022-12-13 14:40:01,539 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 260 flow [2022-12-13 14:40:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.15384615384616) internal successors, (2511), 13 states have internal predecessors, (2511), 0 states have call successors, (0), 0 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 14:40:01,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:01,540 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-12-13 14:40:01,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:40:01,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:01,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:40:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash -643766492, now seen corresponding path program 2 times [2022-12-13 14:40:01,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:01,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826814163] [2022-12-13 14:40:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:01,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:01,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826814163] [2022-12-13 14:40:01,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826814163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:01,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:01,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:40:01,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895887862] [2022-12-13 14:40:01,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:40:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:40:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:40:01,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2022-12-13 14:40:01,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:01,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:01,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2022-12-13 14:40:01,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:02,095 INFO L130 PetriNetUnfolder]: 633/1352 cut-off events. [2022-12-13 14:40:02,095 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-12-13 14:40:02,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1352 events. 633/1352 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8731 event pairs, 0 based on Foata normal form. 0/923 useless extension candidates. Maximal degree in co-relation 2601. Up to 1216 conditions per place. [2022-12-13 14:40:02,102 INFO L137 encePairwiseOnDemand]: 425/429 looper letters, 86 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2022-12-13 14:40:02,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 480 flow [2022-12-13 14:40:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:40:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:40:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2022-12-13 14:40:02,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5097125097125097 [2022-12-13 14:40:02,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2022-12-13 14:40:02,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2022-12-13 14:40:02,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:02,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2022-12-13 14:40:02,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:02,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 14:40:02,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 14:40:02,109 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 260 flow. Second operand 3 states and 656 transitions. [2022-12-13 14:40:02,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 480 flow [2022-12-13 14:40:02,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 101 transitions, 432 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 14:40:02,114 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 222 flow [2022-12-13 14:40:02,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2022-12-13 14:40:02,114 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 15 predicate places. [2022-12-13 14:40:02,115 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 222 flow [2022-12-13 14:40:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:02,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:02,115 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:40:02,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:40:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1417883087, now seen corresponding path program 1 times [2022-12-13 14:40:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495561953] [2022-12-13 14:40:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:02,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:02,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495561953] [2022-12-13 14:40:02,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495561953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:02,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375247417] [2022-12-13 14:40:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:02,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:02,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:40:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:40:02,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:02,342 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 14:40:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:02,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:02,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375247417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:02,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:02,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 14:40:02,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48501721] [2022-12-13 14:40:02,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:02,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:40:02,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:40:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:40:02,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 429 [2022-12-13 14:40:02,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 222 flow. Second operand has 8 states, 8 states have (on average 190.125) internal successors, (1521), 8 states have internal predecessors, (1521), 0 states have call successors, (0), 0 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 14:40:02,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:02,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 429 [2022-12-13 14:40:02,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:02,722 INFO L130 PetriNetUnfolder]: 47/147 cut-off events. [2022-12-13 14:40:02,722 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-12-13 14:40:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 147 events. 47/147 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 489 event pairs, 14 based on Foata normal form. 21/150 useless extension candidates. Maximal degree in co-relation 305. Up to 84 conditions per place. [2022-12-13 14:40:02,723 INFO L137 encePairwiseOnDemand]: 425/429 looper letters, 57 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2022-12-13 14:40:02,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 311 flow [2022-12-13 14:40:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:40:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:40:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2022-12-13 14:40:02,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2022-12-13 14:40:02,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2022-12-13 14:40:02,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2022-12-13 14:40:02,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:02,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2022-12-13 14:40:02,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:02,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 429.0) internal successors, (2145), 5 states have internal predecessors, (2145), 0 states have call successors, (0), 0 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 14:40:02,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 429.0) internal successors, (2145), 5 states have internal predecessors, (2145), 0 states have call successors, (0), 0 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 14:40:02,731 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 222 flow. Second operand 4 states and 803 transitions. [2022-12-13 14:40:02,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 311 flow [2022-12-13 14:40:02,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 305 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:40:02,734 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 147 flow [2022-12-13 14:40:02,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2022-12-13 14:40:02,735 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, -15 predicate places. [2022-12-13 14:40:02,735 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 147 flow [2022-12-13 14:40:02,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 190.125) internal successors, (1521), 8 states have internal predecessors, (1521), 0 states have call successors, (0), 0 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 14:40:02,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:02,736 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 14:40:02,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:40:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 14:40:02,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 14:40:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1004702034, now seen corresponding path program 1 times [2022-12-13 14:40:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677771620] [2022-12-13 14:40:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:40:03,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:40:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:40:03,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:40:03,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:40:03,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-12-13 14:40:03,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-12-13 14:40:03,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-12-13 14:40:03,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-12-13 14:40:03,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-12-13 14:40:03,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-12-13 14:40:03,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-12-13 14:40:03,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-12-13 14:40:03,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-12-13 14:40:03,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-12-13 14:40:03,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-12-13 14:40:03,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-12-13 14:40:03,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-12-13 14:40:03,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-12-13 14:40:03,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-12-13 14:40:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:40:03,050 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-12-13 14:40:03,052 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:40:03,053 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 14:40:03,086 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:40:03,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 311 transitions, 640 flow [2022-12-13 14:40:03,147 INFO L130 PetriNetUnfolder]: 82/543 cut-off events. [2022-12-13 14:40:03,147 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:40:03,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 543 events. 82/543 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2719 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 331. Up to 12 conditions per place. [2022-12-13 14:40:03,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 311 transitions, 640 flow [2022-12-13 14:40:03,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 311 transitions, 640 flow [2022-12-13 14:40:03,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:40:03,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 311 transitions, 640 flow [2022-12-13 14:40:03,157 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 311 transitions, 640 flow [2022-12-13 14:40:03,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 311 transitions, 640 flow [2022-12-13 14:40:03,220 INFO L130 PetriNetUnfolder]: 82/543 cut-off events. [2022-12-13 14:40:03,220 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:40:03,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 543 events. 82/543 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2719 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 331. Up to 12 conditions per place. [2022-12-13 14:40:03,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 49572 [2022-12-13 14:40:06,319 INFO L134 LiptonReduction]: Checked pairs total: 97814 [2022-12-13 14:40:06,319 INFO L136 LiptonReduction]: Total number of compositions: 272 [2022-12-13 14:40:06,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:40:06,321 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;@5efb09b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:40:06,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-12-13 14:40:06,322 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 14:40:06,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:40:06,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:06,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:40:06,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1557333, now seen corresponding path program 1 times [2022-12-13 14:40:06,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:06,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575246707] [2022-12-13 14:40:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:06,336 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 14:40:06,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:06,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575246707] [2022-12-13 14:40:06,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575246707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:06,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:06,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:40:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477798049] [2022-12-13 14:40:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:40:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:40:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:40:06,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 583 [2022-12-13 14:40:06,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 14:40:06,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:06,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 583 [2022-12-13 14:40:06,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:09,345 INFO L130 PetriNetUnfolder]: 31051/49582 cut-off events. [2022-12-13 14:40:09,345 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-12-13 14:40:09,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94412 conditions, 49582 events. 31051/49582 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 1857. Compared 405491 event pairs, 27637 based on Foata normal form. 3712/36284 useless extension candidates. Maximal degree in co-relation 33475. Up to 44698 conditions per place. [2022-12-13 14:40:09,567 INFO L137 encePairwiseOnDemand]: 540/583 looper letters, 81 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2022-12-13 14:40:09,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 390 flow [2022-12-13 14:40:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:40:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:40:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 907 transitions. [2022-12-13 14:40:09,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5185820468839337 [2022-12-13 14:40:09,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 907 transitions. [2022-12-13 14:40:09,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 907 transitions. [2022-12-13 14:40:09,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:09,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 907 transitions. [2022-12-13 14:40:09,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 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 14:40:09,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 14:40:09,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 14:40:09,574 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 302 flow. Second operand 3 states and 907 transitions. [2022-12-13 14:40:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 390 flow [2022-12-13 14:40:09,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:40:09,577 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 234 flow [2022-12-13 14:40:09,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2022-12-13 14:40:09,577 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2022-12-13 14:40:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 234 flow [2022-12-13 14:40:09,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 14:40:09,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:09,578 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:40:09,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:40:09,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 48286919, now seen corresponding path program 1 times [2022-12-13 14:40:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532770508] [2022-12-13 14:40:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:09,601 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 14:40:09,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532770508] [2022-12-13 14:40:09,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532770508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073013221] [2022-12-13 14:40:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:09,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:09,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:09,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:40:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:40:09,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:09,670 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 14:40:09,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:09,681 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 14:40:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073013221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:09,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:09,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:40:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688459185] [2022-12-13 14:40:09,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:09,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:40:09,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:40:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:40:09,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 583 [2022-12-13 14:40:09,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 261.2857142857143) internal successors, (1829), 7 states have internal predecessors, (1829), 0 states have call successors, (0), 0 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 14:40:09,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:09,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 583 [2022-12-13 14:40:09,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:12,794 INFO L130 PetriNetUnfolder]: 31051/49585 cut-off events. [2022-12-13 14:40:12,795 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-12-13 14:40:12,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94428 conditions, 49585 events. 31051/49585 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 1857. Compared 405530 event pairs, 27637 based on Foata normal form. 0/32575 useless extension candidates. Maximal degree in co-relation 94415. Up to 44698 conditions per place. [2022-12-13 14:40:12,974 INFO L137 encePairwiseOnDemand]: 580/583 looper letters, 81 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2022-12-13 14:40:12,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 418 flow [2022-12-13 14:40:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:40:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:40:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1649 transitions. [2022-12-13 14:40:12,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47141223556317896 [2022-12-13 14:40:12,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1649 transitions. [2022-12-13 14:40:12,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1649 transitions. [2022-12-13 14:40:12,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:12,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1649 transitions. [2022-12-13 14:40:12,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 0 states have call successors, (0), 0 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 14:40:12,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 583.0) internal successors, (4081), 7 states have internal predecessors, (4081), 0 states have call successors, (0), 0 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 14:40:12,993 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 583.0) internal successors, (4081), 7 states have internal predecessors, (4081), 0 states have call successors, (0), 0 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 14:40:12,993 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 234 flow. Second operand 6 states and 1649 transitions. [2022-12-13 14:40:12,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 418 flow [2022-12-13 14:40:12,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 414 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:40:12,997 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 266 flow [2022-12-13 14:40:12,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2022-12-13 14:40:12,998 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2022-12-13 14:40:12,998 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 266 flow [2022-12-13 14:40:12,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 261.2857142857143) internal successors, (1829), 7 states have internal predecessors, (1829), 0 states have call successors, (0), 0 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 14:40:12,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:12,999 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 14:40:13,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 14:40:13,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:13,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash -288911403, now seen corresponding path program 2 times [2022-12-13 14:40:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:13,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330374635] [2022-12-13 14:40:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:40:13,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330374635] [2022-12-13 14:40:13,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330374635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:13,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:13,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:40:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541224459] [2022-12-13 14:40:13,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:13,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:40:13,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:40:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:40:13,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 583 [2022-12-13 14:40:13,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 14:40:13,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:13,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 583 [2022-12-13 14:40:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:16,693 INFO L130 PetriNetUnfolder]: 28976/46073 cut-off events. [2022-12-13 14:40:16,694 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-12-13 14:40:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88027 conditions, 46073 events. 28976/46073 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 1729. Compared 374574 event pairs, 23970 based on Foata normal form. 0/30666 useless extension candidates. Maximal degree in co-relation 87992. Up to 38847 conditions per place. [2022-12-13 14:40:16,858 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 124 selfloop transitions, 3 changer transitions 0/147 dead transitions. [2022-12-13 14:40:16,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 602 flow [2022-12-13 14:40:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:40:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:40:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 896 transitions. [2022-12-13 14:40:16,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5122927387078331 [2022-12-13 14:40:16,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 896 transitions. [2022-12-13 14:40:16,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 896 transitions. [2022-12-13 14:40:16,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:16,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 896 transitions. [2022-12-13 14:40:16,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 14:40:16,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 14:40:16,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 14:40:16,863 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 266 flow. Second operand 3 states and 896 transitions. [2022-12-13 14:40:16,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 602 flow [2022-12-13 14:40:16,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 147 transitions, 588 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:40:16,865 INFO L231 Difference]: Finished difference. Result has 107 places, 104 transitions, 254 flow [2022-12-13 14:40:16,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=104} [2022-12-13 14:40:16,866 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 1 predicate places. [2022-12-13 14:40:16,866 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 104 transitions, 254 flow [2022-12-13 14:40:16,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 14:40:16,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:16,867 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 14:40:16,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:40:16,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash -288911404, now seen corresponding path program 1 times [2022-12-13 14:40:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:16,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862907154] [2022-12-13 14:40:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:40:16,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862907154] [2022-12-13 14:40:16,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862907154] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033009861] [2022-12-13 14:40:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:16,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:16,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:40:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:40:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:40:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:40:17,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033009861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:17,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:17,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 14:40:17,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517310029] [2022-12-13 14:40:17,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:17,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:40:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:17,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:40:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:40:17,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 583 [2022-12-13 14:40:17,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 104 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 261.15384615384613) internal successors, (3395), 13 states have internal predecessors, (3395), 0 states have call successors, (0), 0 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 14:40:17,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:17,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 583 [2022-12-13 14:40:17,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:20,347 INFO L130 PetriNetUnfolder]: 29058/46385 cut-off events. [2022-12-13 14:40:20,347 INFO L131 PetriNetUnfolder]: For 702/702 co-relation queries the response was YES. [2022-12-13 14:40:20,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89364 conditions, 46385 events. 29058/46385 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 376104 event pairs, 25814 based on Foata normal form. 6/31534 useless extension candidates. Maximal degree in co-relation 89311. Up to 41796 conditions per place. [2022-12-13 14:40:20,551 INFO L137 encePairwiseOnDemand]: 580/583 looper letters, 79 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2022-12-13 14:40:20,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 110 transitions, 470 flow [2022-12-13 14:40:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:40:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:40:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3216 transitions. [2022-12-13 14:40:20,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45969125214408235 [2022-12-13 14:40:20,557 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3216 transitions. [2022-12-13 14:40:20,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3216 transitions. [2022-12-13 14:40:20,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:20,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3216 transitions. [2022-12-13 14:40:20,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 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 14:40:20,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 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 14:40:20,570 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 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 14:40:20,571 INFO L175 Difference]: Start difference. First operand has 107 places, 104 transitions, 254 flow. Second operand 12 states and 3216 transitions. [2022-12-13 14:40:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 110 transitions, 470 flow [2022-12-13 14:40:20,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 110 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:40:20,577 INFO L231 Difference]: Finished difference. Result has 122 places, 110 transitions, 332 flow [2022-12-13 14:40:20,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=122, PETRI_TRANSITIONS=110} [2022-12-13 14:40:20,578 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 16 predicate places. [2022-12-13 14:40:20,578 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 110 transitions, 332 flow [2022-12-13 14:40:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 261.15384615384613) internal successors, (3395), 13 states have internal predecessors, (3395), 0 states have call successors, (0), 0 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 14:40:20,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:20,579 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-12-13 14:40:20,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:40:20,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 14:40:20,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 887884436, now seen corresponding path program 2 times [2022-12-13 14:40:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:20,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911923834] [2022-12-13 14:40:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:20,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911923834] [2022-12-13 14:40:20,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911923834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:20,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:20,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:40:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196763150] [2022-12-13 14:40:20,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:20,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:40:20,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:40:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:40:20,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 583 [2022-12-13 14:40:20,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 110 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 14:40:20,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:20,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 583 [2022-12-13 14:40:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:24,499 INFO L130 PetriNetUnfolder]: 29199/46100 cut-off events. [2022-12-13 14:40:24,499 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-12-13 14:40:24,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88083 conditions, 46100 events. 29199/46100 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 1810. Compared 371071 event pairs, 18468 based on Foata normal form. 0/30811 useless extension candidates. Maximal degree in co-relation 88006. Up to 41759 conditions per place. [2022-12-13 14:40:24,740 INFO L137 encePairwiseOnDemand]: 579/583 looper letters, 111 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2022-12-13 14:40:24,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 133 transitions, 604 flow [2022-12-13 14:40:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:40:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:40:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2022-12-13 14:40:24,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5060034305317325 [2022-12-13 14:40:24,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2022-12-13 14:40:24,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2022-12-13 14:40:24,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:24,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2022-12-13 14:40:24,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 14:40:24,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 14:40:24,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 14:40:24,746 INFO L175 Difference]: Start difference. First operand has 122 places, 110 transitions, 332 flow. Second operand 3 states and 885 transitions. [2022-12-13 14:40:24,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 133 transitions, 604 flow [2022-12-13 14:40:24,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 133 transitions, 556 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 14:40:24,749 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 298 flow [2022-12-13 14:40:24,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2022-12-13 14:40:24,749 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 14 predicate places. [2022-12-13 14:40:24,750 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 298 flow [2022-12-13 14:40:24,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 14:40:24,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:24,750 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:24,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 14:40:24,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1986456849, now seen corresponding path program 1 times [2022-12-13 14:40:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:24,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317523475] [2022-12-13 14:40:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:24,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:24,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317523475] [2022-12-13 14:40:24,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317523475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:24,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033471765] [2022-12-13 14:40:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:24,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:24,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:24,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:24,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:40:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:24,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:40:24,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:24,896 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 14:40:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:24,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:24,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033471765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:24,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:24,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:40:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63704083] [2022-12-13 14:40:24,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:40:24,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:24,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:40:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:40:25,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 583 [2022-12-13 14:40:25,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 259.0) internal successors, (1813), 7 states have internal predecessors, (1813), 0 states have call successors, (0), 0 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 14:40:25,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:25,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 583 [2022-12-13 14:40:25,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:28,494 INFO L130 PetriNetUnfolder]: 26680/41981 cut-off events. [2022-12-13 14:40:28,494 INFO L131 PetriNetUnfolder]: For 1078/1078 co-relation queries the response was YES. [2022-12-13 14:40:28,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83494 conditions, 41981 events. 26680/41981 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 1698. Compared 343947 event pairs, 1 based on Foata normal form. 21/28726 useless extension candidates. Maximal degree in co-relation 83440. Up to 35461 conditions per place. [2022-12-13 14:40:28,714 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 194 selfloop transitions, 5 changer transitions 0/219 dead transitions. [2022-12-13 14:40:28,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 219 transitions, 910 flow [2022-12-13 14:40:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:40:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:40:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1477 transitions. [2022-12-13 14:40:28,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5066895368782162 [2022-12-13 14:40:28,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1477 transitions. [2022-12-13 14:40:28,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1477 transitions. [2022-12-13 14:40:28,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:28,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1477 transitions. [2022-12-13 14:40:28,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 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 14:40:28,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 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 14:40:28,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 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 14:40:28,722 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 298 flow. Second operand 5 states and 1477 transitions. [2022-12-13 14:40:28,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 219 transitions, 910 flow [2022-12-13 14:40:28,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 219 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:40:28,726 INFO L231 Difference]: Finished difference. Result has 123 places, 110 transitions, 306 flow [2022-12-13 14:40:28,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=123, PETRI_TRANSITIONS=110} [2022-12-13 14:40:28,727 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 17 predicate places. [2022-12-13 14:40:28,727 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 110 transitions, 306 flow [2022-12-13 14:40:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 259.0) internal successors, (1813), 7 states have internal predecessors, (1813), 0 states have call successors, (0), 0 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 14:40:28,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:28,728 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:28,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:40:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:40:28,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1466620630, now seen corresponding path program 1 times [2022-12-13 14:40:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:28,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405121942] [2022-12-13 14:40:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:28,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:29,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:29,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405121942] [2022-12-13 14:40:29,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405121942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:29,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:29,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:40:29,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692418944] [2022-12-13 14:40:29,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:29,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:40:29,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:40:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:40:29,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 583 [2022-12-13 14:40:29,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 110 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 14:40:29,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:29,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 583 [2022-12-13 14:40:29,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:35,565 INFO L130 PetriNetUnfolder]: 50721/81231 cut-off events. [2022-12-13 14:40:35,566 INFO L131 PetriNetUnfolder]: For 6587/6587 co-relation queries the response was YES. [2022-12-13 14:40:35,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161069 conditions, 81231 events. 50721/81231 cut-off events. For 6587/6587 co-relation queries the response was YES. Maximal size of possible extension queue 2844. Compared 730972 event pairs, 22670 based on Foata normal form. 1250/58574 useless extension candidates. Maximal degree in co-relation 161014. Up to 36514 conditions per place. [2022-12-13 14:40:36,096 INFO L137 encePairwiseOnDemand]: 572/583 looper letters, 380 selfloop transitions, 18 changer transitions 0/418 dead transitions. [2022-12-13 14:40:36,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 418 transitions, 1799 flow [2022-12-13 14:40:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:40:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 14:40:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2862 transitions. [2022-12-13 14:40:36,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2022-12-13 14:40:36,101 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2862 transitions. [2022-12-13 14:40:36,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2862 transitions. [2022-12-13 14:40:36,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:36,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2862 transitions. [2022-12-13 14:40:36,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 286.2) internal successors, (2862), 10 states have internal predecessors, (2862), 0 states have call successors, (0), 0 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 14:40:36,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 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 14:40:36,110 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 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 14:40:36,110 INFO L175 Difference]: Start difference. First operand has 123 places, 110 transitions, 306 flow. Second operand 10 states and 2862 transitions. [2022-12-13 14:40:36,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 418 transitions, 1799 flow [2022-12-13 14:40:36,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 418 transitions, 1765 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 14:40:36,140 INFO L231 Difference]: Finished difference. Result has 133 places, 124 transitions, 400 flow [2022-12-13 14:40:36,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=133, PETRI_TRANSITIONS=124} [2022-12-13 14:40:36,140 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 27 predicate places. [2022-12-13 14:40:36,141 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 124 transitions, 400 flow [2022-12-13 14:40:36,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 14:40:36,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:36,141 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 14:40:36,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:36,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1779403677, now seen corresponding path program 1 times [2022-12-13 14:40:36,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:36,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623775745] [2022-12-13 14:40:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:36,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623775745] [2022-12-13 14:40:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623775745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:36,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:36,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:40:36,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159874987] [2022-12-13 14:40:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:36,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:40:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:40:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:40:36,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 583 [2022-12-13 14:40:36,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 124 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 246.66666666666666) internal successors, (1480), 6 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 14:40:36,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:36,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 583 [2022-12-13 14:40:36,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:42,501 INFO L130 PetriNetUnfolder]: 46313/73778 cut-off events. [2022-12-13 14:40:42,502 INFO L131 PetriNetUnfolder]: For 14014/14014 co-relation queries the response was YES. [2022-12-13 14:40:42,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159826 conditions, 73778 events. 46313/73778 cut-off events. For 14014/14014 co-relation queries the response was YES. Maximal size of possible extension queue 2637. Compared 659041 event pairs, 1628 based on Foata normal form. 0/55191 useless extension candidates. Maximal degree in co-relation 159766. Up to 58031 conditions per place. [2022-12-13 14:40:42,938 INFO L137 encePairwiseOnDemand]: 568/583 looper letters, 214 selfloop transitions, 20 changer transitions 0/251 dead transitions. [2022-12-13 14:40:42,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 251 transitions, 1183 flow [2022-12-13 14:40:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:40:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:40:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1442 transitions. [2022-12-13 14:40:42,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4946826758147513 [2022-12-13 14:40:42,941 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1442 transitions. [2022-12-13 14:40:42,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1442 transitions. [2022-12-13 14:40:42,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:42,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1442 transitions. [2022-12-13 14:40:42,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.4) internal successors, (1442), 5 states have internal predecessors, (1442), 0 states have call successors, (0), 0 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 14:40:42,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 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 14:40:42,946 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 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 14:40:42,946 INFO L175 Difference]: Start difference. First operand has 133 places, 124 transitions, 400 flow. Second operand 5 states and 1442 transitions. [2022-12-13 14:40:42,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 251 transitions, 1183 flow [2022-12-13 14:40:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 251 transitions, 1182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:40:43,545 INFO L231 Difference]: Finished difference. Result has 139 places, 134 transitions, 533 flow [2022-12-13 14:40:43,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=533, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2022-12-13 14:40:43,546 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 33 predicate places. [2022-12-13 14:40:43,546 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 533 flow [2022-12-13 14:40:43,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 246.66666666666666) internal successors, (1480), 6 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 14:40:43,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:43,546 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:43,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 14:40:43,547 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1779403284, now seen corresponding path program 1 times [2022-12-13 14:40:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158201180] [2022-12-13 14:40:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 14:40:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:43,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158201180] [2022-12-13 14:40:43,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158201180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:40:43,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:40:43,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:40:43,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195862150] [2022-12-13 14:40:43,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:40:43,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:40:43,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:43,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:40:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:40:43,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 583 [2022-12-13 14:40:43,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 533 flow. Second operand has 6 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 0 states have call successors, (0), 0 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 14:40:43,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:43,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 583 [2022-12-13 14:40:43,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:55,265 INFO L130 PetriNetUnfolder]: 85858/135077 cut-off events. [2022-12-13 14:40:55,266 INFO L131 PetriNetUnfolder]: For 59368/59864 co-relation queries the response was YES. [2022-12-13 14:40:55,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324249 conditions, 135077 events. 85858/135077 cut-off events. For 59368/59864 co-relation queries the response was YES. Maximal size of possible extension queue 4515. Compared 1228624 event pairs, 13935 based on Foata normal form. 90/100882 useless extension candidates. Maximal degree in co-relation 324185. Up to 70639 conditions per place. [2022-12-13 14:40:56,121 INFO L137 encePairwiseOnDemand]: 570/583 looper letters, 326 selfloop transitions, 52 changer transitions 0/398 dead transitions. [2022-12-13 14:40:56,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 398 transitions, 2241 flow [2022-12-13 14:40:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:40:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:40:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2041 transitions. [2022-12-13 14:40:56,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5001225189904435 [2022-12-13 14:40:56,125 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2041 transitions. [2022-12-13 14:40:56,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2041 transitions. [2022-12-13 14:40:56,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:56,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2041 transitions. [2022-12-13 14:40:56,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 291.57142857142856) internal successors, (2041), 7 states have internal predecessors, (2041), 0 states have call successors, (0), 0 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 14:40:56,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 583.0) internal successors, (4664), 8 states have internal predecessors, (4664), 0 states have call successors, (0), 0 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 14:40:56,132 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 583.0) internal successors, (4664), 8 states have internal predecessors, (4664), 0 states have call successors, (0), 0 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 14:40:56,132 INFO L175 Difference]: Start difference. First operand has 139 places, 134 transitions, 533 flow. Second operand 7 states and 2041 transitions. [2022-12-13 14:40:56,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 398 transitions, 2241 flow [2022-12-13 14:40:57,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 398 transitions, 2241 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:40:57,361 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 1074 flow [2022-12-13 14:40:57,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1074, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2022-12-13 14:40:57,362 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 44 predicate places. [2022-12-13 14:40:57,362 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 1074 flow [2022-12-13 14:40:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 0 states have call successors, (0), 0 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 14:40:57,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:57,362 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 14:40:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 14:40:57,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 14:40:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1842672994, now seen corresponding path program 1 times [2022-12-13 14:40:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:57,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941868354] [2022-12-13 14:40:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:40:57,374 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:40:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:40:57,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:40:57,384 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-12-13 14:40:57,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-12-13 14:40:57,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-12-13 14:40:57,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-12-13 14:40:57,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-12-13 14:40:57,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 14:40:57,387 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:57,387 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:40:57,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 14:40:57,409 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:40:57,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 394 transitions, 818 flow [2022-12-13 14:40:57,496 INFO L130 PetriNetUnfolder]: 120/800 cut-off events. [2022-12-13 14:40:57,497 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:40:57,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 800 events. 120/800 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4347 event pairs, 1 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 551. Up to 16 conditions per place. [2022-12-13 14:40:57,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 394 transitions, 818 flow [2022-12-13 14:40:57,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 338 places, 394 transitions, 818 flow [2022-12-13 14:40:57,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:40:57,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 338 places, 394 transitions, 818 flow [2022-12-13 14:40:57,509 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 338 places, 394 transitions, 818 flow [2022-12-13 14:40:57,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 394 transitions, 818 flow [2022-12-13 14:40:57,591 INFO L130 PetriNetUnfolder]: 120/800 cut-off events. [2022-12-13 14:40:57,591 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:40:57,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 800 events. 120/800 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4347 event pairs, 1 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 551. Up to 16 conditions per place. [2022-12-13 14:40:57,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 94770 [2022-12-13 14:41:01,481 INFO L134 LiptonReduction]: Checked pairs total: 195155 [2022-12-13 14:41:01,481 INFO L136 LiptonReduction]: Total number of compositions: 338 [2022-12-13 14:41:01,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:41:01,482 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;@5efb09b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:41:01,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-12-13 14:41:01,483 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 14:41:01,483 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:41:01,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:41:01,483 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:41:01,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 14:41:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2366269, now seen corresponding path program 1 times [2022-12-13 14:41:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264751646] [2022-12-13 14:41:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:01,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:01,496 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 14:41:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:01,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264751646] [2022-12-13 14:41:01,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264751646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:01,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:01,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:41:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977281955] [2022-12-13 14:41:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:41:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:41:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:41:01,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 732 [2022-12-13 14:41:01,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 14:41:01,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:41:01,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 732 [2022-12-13 14:41:01,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:42:39,405 INFO L130 PetriNetUnfolder]: 1024399/1459872 cut-off events. [2022-12-13 14:42:39,406 INFO L131 PetriNetUnfolder]: For 7262/7262 co-relation queries the response was YES. [2022-12-13 14:42:41,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792369 conditions, 1459872 events. 1024399/1459872 cut-off events. For 7262/7262 co-relation queries the response was YES. Maximal size of possible extension queue 42902. Compared 13944627 event pairs, 932333 based on Foata normal form. 127930/1110105 useless extension candidates. Maximal degree in co-relation 362200. Up to 1328550 conditions per place. [2022-12-13 14:42:46,103 INFO L137 encePairwiseOnDemand]: 677/732 looper letters, 105 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2022-12-13 14:42:46,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 134 transitions, 512 flow [2022-12-13 14:42:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:42:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:42:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1147 transitions. [2022-12-13 14:42:46,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5223132969034608 [2022-12-13 14:42:46,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1147 transitions. [2022-12-13 14:42:46,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1147 transitions. [2022-12-13 14:42:46,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:42:46,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1147 transitions. [2022-12-13 14:42:46,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.3333333333333) internal successors, (1147), 3 states have internal predecessors, (1147), 0 states have call successors, (0), 0 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 14:42:46,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 732.0) internal successors, (2928), 4 states have internal predecessors, (2928), 0 states have call successors, (0), 0 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 14:42:46,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 732.0) internal successors, (2928), 4 states have internal predecessors, (2928), 0 states have call successors, (0), 0 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 14:42:46,109 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 402 flow. Second operand 3 states and 1147 transitions. [2022-12-13 14:42:46,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 134 transitions, 512 flow [2022-12-13 14:42:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 134 transitions, 512 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:42:46,112 INFO L231 Difference]: Finished difference. Result has 131 places, 134 transitions, 308 flow [2022-12-13 14:42:46,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=732, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=131, PETRI_TRANSITIONS=134} [2022-12-13 14:42:46,112 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -8 predicate places. [2022-12-13 14:42:46,112 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 134 transitions, 308 flow [2022-12-13 14:42:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 14:42:46,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:42:46,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:42:46,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 14:42:46,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 14:42:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash 73376481, now seen corresponding path program 1 times [2022-12-13 14:42:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689106150] [2022-12-13 14:42:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:46,128 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 14:42:46,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:46,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689106150] [2022-12-13 14:42:46,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689106150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:46,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869724798] [2022-12-13 14:42:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:46,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:46,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19fd79ba-10dc-4476-98a5-1da70442e42f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:42:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:46,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:42:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:46,202 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 14:42:46,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:46,210 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 14:42:46,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869724798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:42:46,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:42:46,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:42:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656991435] [2022-12-13 14:42:46,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:46,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:42:46,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:42:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:42:46,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 732 [2022-12-13 14:42:46,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 134 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 329.2857142857143) internal successors, (2305), 7 states have internal predecessors, (2305), 0 states have call successors, (0), 0 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 14:42:46,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:42:46,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 732 [2022-12-13 14:42:46,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand