./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/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_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/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_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/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 eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- 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 14:49:01,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:49:01,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:49:01,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:49:01,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:49:01,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:49:01,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:49:01,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:49:01,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:49:01,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:49:01,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:49:01,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:49:01,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:49:01,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:49:01,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:49:01,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:49:01,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:49:01,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:49:01,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:49:01,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:49:01,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:49:01,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:49:01,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:49:01,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:49:01,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:49:01,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:49:01,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:49:01,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:49:01,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:49:01,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:49:01,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:49:01,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:49:01,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:49:01,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:49:01,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:49:01,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:49:01,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:49:01,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:49:01,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:49:01,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:49:01,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:49:01,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:49:01,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:49:01,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:49:01,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:49:01,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:49:01,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:49:01,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:49:01,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:49:01,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:49:01,944 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:49:01,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:49:01,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:49:01,945 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:49:01,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:49:01,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:49:01,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:49:01,945 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:49:01,946 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:49:01,946 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:49:01,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:49:01,946 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:49:01,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:49:01,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:49:01,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:49:01,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:49:01,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:49:01,948 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:49:01,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:49:01,948 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:49:01,948 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_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2022-12-13 14:49:02,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:49:02,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:49:02,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:49:02,180 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:49:02,181 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:49:02,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-12-13 14:49:04,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:49:04,877 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:49:04,878 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-12-13 14:49:04,888 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/data/372b5ad7e/ea51b00338e348a1904cd8d08f94a062/FLAGd7d639b37 [2022-12-13 14:49:04,902 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/data/372b5ad7e/ea51b00338e348a1904cd8d08f94a062 [2022-12-13 14:49:04,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:49:04,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:49:04,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:49:04,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:49:04,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:49:04,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:49:04" (1/1) ... [2022-12-13 14:49:04,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46fc64a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:04, skipping insertion in model container [2022-12-13 14:49:04,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:49:04" (1/1) ... [2022-12-13 14:49:04,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:49:04,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:49:05,232 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_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-12-13 14:49:05,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:49:05,263 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:49:05,292 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_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-12-13 14:49:05,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:49:05,331 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:49:05,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05 WrapperNode [2022-12-13 14:49:05,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:49:05,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:49:05,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:49:05,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:49:05,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,372 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-12-13 14:49:05,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:49:05,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:49:05,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:49:05,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:49:05,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,395 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:49:05,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:49:05,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:49:05,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:49:05,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (1/1) ... [2022-12-13 14:49:05,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:49:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:49:05,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:49:05,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:49:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:49:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:49:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:49:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:49:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:49:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:49:05,462 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:49:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:49:05,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:49:05,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:49:05,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:49:05,464 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 14:49:05,557 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:49:05,558 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:49:05,755 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:49:05,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:49:05,761 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 14:49:05,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:49:05 BoogieIcfgContainer [2022-12-13 14:49:05,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:49:05,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:49:05,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:49:05,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:49:05,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:49:04" (1/3) ... [2022-12-13 14:49:05,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b00a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:49:05, skipping insertion in model container [2022-12-13 14:49:05,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:49:05" (2/3) ... [2022-12-13 14:49:05,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b00a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:49:05, skipping insertion in model container [2022-12-13 14:49:05,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:49:05" (3/3) ... [2022-12-13 14:49:05,769 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2022-12-13 14:49:05,783 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:49:05,783 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 14:49:05,783 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:49:05,819 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 14:49:05,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 120 transitions, 248 flow [2022-12-13 14:49:05,885 INFO L130 PetriNetUnfolder]: 17/163 cut-off events. [2022-12-13 14:49:05,886 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:49:05,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 17/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 408 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2022-12-13 14:49:05,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 120 transitions, 248 flow [2022-12-13 14:49:05,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 120 transitions, 248 flow [2022-12-13 14:49:05,896 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:49:05,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 120 transitions, 248 flow [2022-12-13 14:49:05,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 120 transitions, 248 flow [2022-12-13 14:49:05,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 120 transitions, 248 flow [2022-12-13 14:49:05,946 INFO L130 PetriNetUnfolder]: 17/163 cut-off events. [2022-12-13 14:49:05,947 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:49:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 17/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 408 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2022-12-13 14:49:05,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 2744 [2022-12-13 14:49:08,495 INFO L134 LiptonReduction]: Checked pairs total: 5287 [2022-12-13 14:49:08,495 INFO L136 LiptonReduction]: Total number of compositions: 108 [2022-12-13 14:49:08,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:49:08,515 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;@69418461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:49:08,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 14:49:08,517 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 14:49:08,517 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:49:08,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:08,518 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:08,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash 14696, now seen corresponding path program 1 times [2022-12-13 14:49:08,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:08,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850555718] [2022-12-13 14:49:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:08,726 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 14:49:08,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850555718] [2022-12-13 14:49:08,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850555718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:08,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:08,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328854955] [2022-12-13 14:49:08,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:08,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:08,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:08,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-12-13 14:49:08,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 14:49:08,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:08,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-12-13 14:49:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:08,873 INFO L130 PetriNetUnfolder]: 105/254 cut-off events. [2022-12-13 14:49:08,873 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:49:08,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 254 events. 105/254 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 977 event pairs, 88 based on Foata normal form. 14/207 useless extension candidates. Maximal degree in co-relation 466. Up to 209 conditions per place. [2022-12-13 14:49:08,876 INFO L137 encePairwiseOnDemand]: 215/228 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2022-12-13 14:49:08,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 144 flow [2022-12-13 14:49:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2022-12-13 14:49:08,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5014619883040936 [2022-12-13 14:49:08,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2022-12-13 14:49:08,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2022-12-13 14:49:08,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:08,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2022-12-13 14:49:08,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 14:49:08,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 14:49:08,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 14:49:08,898 INFO L175 Difference]: Start difference. First operand has 31 places, 37 transitions, 82 flow. Second operand 3 states and 343 transitions. [2022-12-13 14:49:08,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 144 flow [2022-12-13 14:49:08,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:49:08,902 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 64 flow [2022-12-13 14:49:08,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 14:49:08,907 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-12-13 14:49:08,908 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 64 flow [2022-12-13 14:49:08,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 14:49:08,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:08,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:08,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:49:08,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:08,909 INFO L85 PathProgramCache]: Analyzing trace with hash 14698, now seen corresponding path program 1 times [2022-12-13 14:49:08,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:08,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177580707] [2022-12-13 14:49:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:09,022 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 14:49:09,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:09,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177580707] [2022-12-13 14:49:09,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177580707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:09,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:09,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:09,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102847590] [2022-12-13 14:49:09,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:09,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 228 [2022-12-13 14:49:09,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:09,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:09,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 228 [2022-12-13 14:49:09,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:09,121 INFO L130 PetriNetUnfolder]: 96/230 cut-off events. [2022-12-13 14:49:09,121 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:49:09,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 230 events. 96/230 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 995 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 434. Up to 210 conditions per place. [2022-12-13 14:49:09,124 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-12-13 14:49:09,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 148 flow [2022-12-13 14:49:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2022-12-13 14:49:09,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49415204678362573 [2022-12-13 14:49:09,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2022-12-13 14:49:09,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2022-12-13 14:49:09,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:09,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2022-12-13 14:49:09,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 14:49:09,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 14:49:09,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 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 14:49:09,128 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 3 states and 338 transitions. [2022-12-13 14:49:09,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 148 flow [2022-12-13 14:49:09,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:49:09,129 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 70 flow [2022-12-13 14:49:09,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 14:49:09,130 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-12-13 14:49:09,130 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 70 flow [2022-12-13 14:49:09,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:09,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:09,131 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:49:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:49:09,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash 438159894, now seen corresponding path program 1 times [2022-12-13 14:49:09,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:09,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761643538] [2022-12-13 14:49:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:09,226 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 14:49:09,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:09,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761643538] [2022-12-13 14:49:09,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761643538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:49:09,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232102272] [2022-12-13 14:49:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:09,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:49:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:49:09,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:49:09,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:49:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:09,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:49:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:49:09,350 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 14:49:09,379 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 14:49:09,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:49:09,420 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 14:49:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232102272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:49:09,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:49:09,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 14:49:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058636543] [2022-12-13 14:49:09,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:49:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:49:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:49:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:49:09,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-12-13 14:49:09,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 99.71428571428571) internal successors, (698), 7 states have internal predecessors, (698), 0 states have call successors, (0), 0 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 14:49:09,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:09,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-12-13 14:49:09,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:09,545 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2022-12-13 14:49:09,545 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 14:49:09,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 16/48 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2022-12-13 14:49:09,546 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-13 14:49:09,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2022-12-13 14:49:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:49:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:49:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2022-12-13 14:49:09,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4550438596491228 [2022-12-13 14:49:09,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2022-12-13 14:49:09,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2022-12-13 14:49:09,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:09,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2022-12-13 14:49:09,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 14:49:09,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 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 14:49:09,552 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 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 14:49:09,552 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 4 states and 415 transitions. [2022-12-13 14:49:09,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2022-12-13 14:49:09,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:49:09,552 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2022-12-13 14:49:09,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2022-12-13 14:49:09,553 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -11 predicate places. [2022-12-13 14:49:09,553 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2022-12-13 14:49:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.71428571428571) internal successors, (698), 7 states have internal predecessors, (698), 0 states have call successors, (0), 0 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 14:49:09,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:09,553 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 14:49:09,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:49:09,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:49:09,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 698055115, now seen corresponding path program 1 times [2022-12-13 14:49:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:09,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306850552] [2022-12-13 14:49:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:49:09,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:49:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:49:09,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:49:09,866 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:49:09,868 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 14:49:09,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 14:49:09,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 14:49:09,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 14:49:09,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 14:49:09,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 14:49:09,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 14:49:09,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:49:09,878 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 14:49:09,884 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:49:09,884 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 14:49:09,914 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:49:09,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-12-13 14:49:09,940 INFO L130 PetriNetUnfolder]: 31/266 cut-off events. [2022-12-13 14:49:09,940 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:49:09,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 31/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 801 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2022-12-13 14:49:09,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2022-12-13 14:49:09,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2022-12-13 14:49:09,942 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:49:09,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 150 transitions, 318 flow [2022-12-13 14:49:09,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 150 transitions, 318 flow [2022-12-13 14:49:09,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-12-13 14:49:09,960 INFO L130 PetriNetUnfolder]: 31/266 cut-off events. [2022-12-13 14:49:09,960 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:49:09,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 31/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 801 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2022-12-13 14:49:09,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 7672 [2022-12-13 14:49:12,329 INFO L134 LiptonReduction]: Checked pairs total: 17796 [2022-12-13 14:49:12,329 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-12-13 14:49:12,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:49:12,331 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69418461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:49:12,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 14:49:12,332 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 14:49:12,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:49:12,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:12,332 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:12,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 24201, now seen corresponding path program 1 times [2022-12-13 14:49:12,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:12,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834463166] [2022-12-13 14:49:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:12,376 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 14:49:12,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:12,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834463166] [2022-12-13 14:49:12,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834463166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:12,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:12,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071539646] [2022-12-13 14:49:12,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:12,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:12,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 267 [2022-12-13 14:49:12,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 14:49:12,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:12,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 267 [2022-12-13 14:49:12,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:12,714 INFO L130 PetriNetUnfolder]: 1864/3374 cut-off events. [2022-12-13 14:49:12,714 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-12-13 14:49:12,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6491 conditions, 3374 events. 1864/3374 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21279 event pairs, 1691 based on Foata normal form. 671/3402 useless extension candidates. Maximal degree in co-relation 3383. Up to 3055 conditions per place. [2022-12-13 14:49:12,726 INFO L137 encePairwiseOnDemand]: 249/267 looper letters, 41 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2022-12-13 14:49:12,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 216 flow [2022-12-13 14:49:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2022-12-13 14:49:12,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5430711610486891 [2022-12-13 14:49:12,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2022-12-13 14:49:12,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2022-12-13 14:49:12,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:12,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2022-12-13 14:49:12,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 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 14:49:12,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 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 14:49:12,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 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 14:49:12,730 INFO L175 Difference]: Start difference. First operand has 49 places, 60 transitions, 138 flow. Second operand 3 states and 435 transitions. [2022-12-13 14:49:12,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 216 flow [2022-12-13 14:49:12,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:49:12,732 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 122 flow [2022-12-13 14:49:12,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2022-12-13 14:49:12,732 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-12-13 14:49:12,732 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 122 flow [2022-12-13 14:49:12,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 14:49:12,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:12,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:12,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:49:12,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash 24202, now seen corresponding path program 1 times [2022-12-13 14:49:12,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:12,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722385612] [2022-12-13 14:49:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:12,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:12,752 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 14:49:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722385612] [2022-12-13 14:49:12,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722385612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:12,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:12,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864594493] [2022-12-13 14:49:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:12,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:12,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 267 [2022-12-13 14:49:12,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:12,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:12,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 267 [2022-12-13 14:49:12,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:13,048 INFO L130 PetriNetUnfolder]: 1500/2696 cut-off events. [2022-12-13 14:49:13,048 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-12-13 14:49:13,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 2696 events. 1500/2696 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16346 event pairs, 1368 based on Foata normal form. 0/2347 useless extension candidates. Maximal degree in co-relation 5377. Up to 2265 conditions per place. [2022-12-13 14:49:13,057 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-12-13 14:49:13,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 240 flow [2022-12-13 14:49:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-12-13 14:49:13,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5093632958801498 [2022-12-13 14:49:13,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-12-13 14:49:13,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-12-13 14:49:13,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:13,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-12-13 14:49:13,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 14:49:13,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 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 14:49:13,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 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 14:49:13,061 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 122 flow. Second operand 3 states and 408 transitions. [2022-12-13 14:49:13,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 240 flow [2022-12-13 14:49:13,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:49:13,064 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 120 flow [2022-12-13 14:49:13,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2022-12-13 14:49:13,065 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-12-13 14:49:13,065 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 120 flow [2022-12-13 14:49:13,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:13,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:13,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:49:13,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:49:13,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash 895731857, now seen corresponding path program 1 times [2022-12-13 14:49:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:13,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468908385] [2022-12-13 14:49:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:13,141 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 14:49:13,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468908385] [2022-12-13 14:49:13,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468908385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:49:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453497619] [2022-12-13 14:49:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:13,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:49:13,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:49:13,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:49:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:49:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:49:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:49:13,212 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 14:49:13,250 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 14:49:13,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:49:13,282 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 14:49:13,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453497619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:49:13,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:49:13,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 14:49:13,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234674256] [2022-12-13 14:49:13,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:49:13,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:49:13,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:49:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:49:13,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 267 [2022-12-13 14:49:13,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 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 14:49:13,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:13,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 267 [2022-12-13 14:49:13,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:13,635 INFO L130 PetriNetUnfolder]: 1347/2337 cut-off events. [2022-12-13 14:49:13,635 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2022-12-13 14:49:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4846 conditions, 2337 events. 1347/2337 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13430 event pairs, 520 based on Foata normal form. 7/2197 useless extension candidates. Maximal degree in co-relation 4348. Up to 1855 conditions per place. [2022-12-13 14:49:13,643 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 64 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2022-12-13 14:49:13,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 324 flow [2022-12-13 14:49:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:49:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:49:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2022-12-13 14:49:13,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5026217228464419 [2022-12-13 14:49:13,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2022-12-13 14:49:13,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2022-12-13 14:49:13,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:13,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2022-12-13 14:49:13,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 14:49:13,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 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 14:49:13,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 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 14:49:13,651 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 120 flow. Second operand 5 states and 671 transitions. [2022-12-13 14:49:13,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 324 flow [2022-12-13 14:49:13,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:49:13,655 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 124 flow [2022-12-13 14:49:13,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-13 14:49:13,656 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-12-13 14:49:13,656 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 124 flow [2022-12-13 14:49:13,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 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 14:49:13,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:13,656 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 14:49:13,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:49:13,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 14:49:13,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash 385416868, now seen corresponding path program 1 times [2022-12-13 14:49:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498036791] [2022-12-13 14:49:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:49:13,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:49:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:49:13,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:49:13,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:49:13,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 14:49:13,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 14:49:13,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 14:49:13,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 14:49:13,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 14:49:13,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 14:49:13,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 14:49:13,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:49:13,893 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 14:49:13,894 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:49:13,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 14:49:13,912 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:49:13,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 180 transitions, 390 flow [2022-12-13 14:49:13,949 INFO L130 PetriNetUnfolder]: 50/412 cut-off events. [2022-12-13 14:49:13,949 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:49:13,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 412 events. 50/412 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1430 event pairs, 1 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2022-12-13 14:49:13,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 180 transitions, 390 flow [2022-12-13 14:49:13,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 180 transitions, 390 flow [2022-12-13 14:49:13,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:49:13,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 180 transitions, 390 flow [2022-12-13 14:49:13,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 180 transitions, 390 flow [2022-12-13 14:49:13,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 180 transitions, 390 flow [2022-12-13 14:49:13,980 INFO L130 PetriNetUnfolder]: 50/412 cut-off events. [2022-12-13 14:49:13,980 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:49:13,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 412 events. 50/412 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1430 event pairs, 1 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2022-12-13 14:49:13,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 14112 [2022-12-13 14:49:16,140 INFO L134 LiptonReduction]: Checked pairs total: 36475 [2022-12-13 14:49:16,141 INFO L136 LiptonReduction]: Total number of compositions: 132 [2022-12-13 14:49:16,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:49:16,142 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;@69418461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:49:16,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 14:49:16,143 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 14:49:16,143 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:49:16,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:16,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:16,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 35134, now seen corresponding path program 1 times [2022-12-13 14:49:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:16,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716288885] [2022-12-13 14:49:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:16,161 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 14:49:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716288885] [2022-12-13 14:49:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716288885] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:16,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:16,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074261471] [2022-12-13 14:49:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:16,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 312 [2022-12-13 14:49:16,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 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 14:49:16,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:16,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 312 [2022-12-13 14:49:16,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:19,061 INFO L130 PetriNetUnfolder]: 30712/45495 cut-off events. [2022-12-13 14:49:19,062 INFO L131 PetriNetUnfolder]: For 1039/1039 co-relation queries the response was YES. [2022-12-13 14:49:19,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89578 conditions, 45495 events. 30712/45495 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 319898 event pairs, 25801 based on Foata normal form. 9143/48622 useless extension candidates. Maximal degree in co-relation 21268. Up to 36562 conditions per place. [2022-12-13 14:49:19,209 INFO L137 encePairwiseOnDemand]: 287/312 looper letters, 66 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2022-12-13 14:49:19,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 330 flow [2022-12-13 14:49:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2022-12-13 14:49:19,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5715811965811965 [2022-12-13 14:49:19,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2022-12-13 14:49:19,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2022-12-13 14:49:19,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:19,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2022-12-13 14:49:19,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 14:49:19,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 14:49:19,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 14:49:19,213 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 188 flow. Second operand 3 states and 535 transitions. [2022-12-13 14:49:19,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 330 flow [2022-12-13 14:49:19,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:49:19,215 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 146 flow [2022-12-13 14:49:19,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-12-13 14:49:19,215 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-12-13 14:49:19,216 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 146 flow [2022-12-13 14:49:19,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 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 14:49:19,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:19,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:19,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:49:19,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 35136, now seen corresponding path program 1 times [2022-12-13 14:49:19,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:19,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91783868] [2022-12-13 14:49:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:19,247 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 14:49:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91783868] [2022-12-13 14:49:19,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91783868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:19,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:19,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806013707] [2022-12-13 14:49:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:19,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:19,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 312 [2022-12-13 14:49:19,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 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 14:49:19,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:19,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 312 [2022-12-13 14:49:19,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:21,931 INFO L130 PetriNetUnfolder]: 28311/42543 cut-off events. [2022-12-13 14:49:21,931 INFO L131 PetriNetUnfolder]: For 1827/1827 co-relation queries the response was YES. [2022-12-13 14:49:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84239 conditions, 42543 events. 28311/42543 cut-off events. For 1827/1827 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 299589 event pairs, 18305 based on Foata normal form. 0/38707 useless extension candidates. Maximal degree in co-relation 76268. Up to 39945 conditions per place. [2022-12-13 14:49:22,072 INFO L137 encePairwiseOnDemand]: 308/312 looper letters, 52 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 14:49:22,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 274 flow [2022-12-13 14:49:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-12-13 14:49:22,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5245726495726496 [2022-12-13 14:49:22,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-12-13 14:49:22,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-12-13 14:49:22,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:22,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-12-13 14:49:22,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 14:49:22,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 14:49:22,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 14:49:22,076 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 146 flow. Second operand 3 states and 491 transitions. [2022-12-13 14:49:22,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 274 flow [2022-12-13 14:49:22,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:49:22,123 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 156 flow [2022-12-13 14:49:22,124 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2022-12-13 14:49:22,124 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-12-13 14:49:22,124 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 156 flow [2022-12-13 14:49:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 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 14:49:22,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:22,124 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:49:22,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:49:22,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1883259567, now seen corresponding path program 1 times [2022-12-13 14:49:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:22,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451507518] [2022-12-13 14:49:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:22,173 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 14:49:22,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:22,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451507518] [2022-12-13 14:49:22,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451507518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:49:22,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134033748] [2022-12-13 14:49:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:22,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:49:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:49:22,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:49:22,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:49:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:49:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:49:22,241 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 14:49:22,268 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 14:49:22,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:49:22,296 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 14:49:22,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134033748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:49:22,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:49:22,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 14:49:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150359003] [2022-12-13 14:49:22,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:49:22,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:49:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:49:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:49:22,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 312 [2022-12-13 14:49:22,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 142.875) internal successors, (1143), 8 states have internal predecessors, (1143), 0 states have call successors, (0), 0 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 14:49:22,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:22,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 312 [2022-12-13 14:49:22,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:23,059 INFO L130 PetriNetUnfolder]: 5560/8977 cut-off events. [2022-12-13 14:49:23,060 INFO L131 PetriNetUnfolder]: For 3483/3483 co-relation queries the response was YES. [2022-12-13 14:49:23,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20372 conditions, 8977 events. 5560/8977 cut-off events. For 3483/3483 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 58665 event pairs, 630 based on Foata normal form. 819/9777 useless extension candidates. Maximal degree in co-relation 2318. Up to 5346 conditions per place. [2022-12-13 14:49:23,083 INFO L137 encePairwiseOnDemand]: 308/312 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2022-12-13 14:49:23,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 385 flow [2022-12-13 14:49:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:49:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:49:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2022-12-13 14:49:23,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49946581196581197 [2022-12-13 14:49:23,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2022-12-13 14:49:23,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2022-12-13 14:49:23,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:23,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2022-12-13 14:49:23,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 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 14:49:23,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 14:49:23,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 14:49:23,093 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 156 flow. Second operand 6 states and 935 transitions. [2022-12-13 14:49:23,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 385 flow [2022-12-13 14:49:23,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 377 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 14:49:23,100 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 14:49:23,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 14:49:23,101 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2022-12-13 14:49:23,101 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 14:49:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.875) internal successors, (1143), 8 states have internal predecessors, (1143), 0 states have call successors, (0), 0 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 14:49:23,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:23,102 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 14:49:23,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:49:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:49:23,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash 540543988, now seen corresponding path program 1 times [2022-12-13 14:49:23,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:23,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363598098] [2022-12-13 14:49:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:23,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:49:23,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:49:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:49:23,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:49:23,348 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:49:23,348 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 14:49:23,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 14:49:23,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 14:49:23,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 14:49:23,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 14:49:23,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 14:49:23,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 14:49:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 14:49:23,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 14:49:23,350 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:49:23,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 14:49:23,369 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 14:49:23,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 210 transitions, 464 flow [2022-12-13 14:49:23,450 INFO L130 PetriNetUnfolder]: 81/646 cut-off events. [2022-12-13 14:49:23,450 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:49:23,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 646 events. 81/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2677 event pairs, 6 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 432. Up to 32 conditions per place. [2022-12-13 14:49:23,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 210 transitions, 464 flow [2022-12-13 14:49:23,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 210 transitions, 464 flow [2022-12-13 14:49:23,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:49:23,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 210 transitions, 464 flow [2022-12-13 14:49:23,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 210 transitions, 464 flow [2022-12-13 14:49:23,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 210 transitions, 464 flow [2022-12-13 14:49:23,534 INFO L130 PetriNetUnfolder]: 81/646 cut-off events. [2022-12-13 14:49:23,534 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:49:23,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 646 events. 81/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2677 event pairs, 6 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 432. Up to 32 conditions per place. [2022-12-13 14:49:23,564 INFO L119 LiptonReduction]: Number of co-enabled transitions 22288 [2022-12-13 14:49:25,955 INFO L134 LiptonReduction]: Checked pairs total: 60342 [2022-12-13 14:49:25,956 INFO L136 LiptonReduction]: Total number of compositions: 147 [2022-12-13 14:49:25,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:49:25,958 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;@69418461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:49:25,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 14:49:25,959 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 14:49:25,959 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:49:25,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:25,959 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:25,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 47509, now seen corresponding path program 1 times [2022-12-13 14:49:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:25,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639470907] [2022-12-13 14:49:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:25,977 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 14:49:25,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639470907] [2022-12-13 14:49:25,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639470907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:25,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:25,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866477244] [2022-12-13 14:49:25,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:25,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:26,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2022-12-13 14:49:26,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:26,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:26,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2022-12-13 14:49:26,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:49:51,571 INFO L130 PetriNetUnfolder]: 276210/381713 cut-off events. [2022-12-13 14:49:51,571 INFO L131 PetriNetUnfolder]: For 12213/12213 co-relation queries the response was YES. [2022-12-13 14:49:52,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750566 conditions, 381713 events. 276210/381713 cut-off events. For 12213/12213 co-relation queries the response was YES. Maximal size of possible extension queue 8568. Compared 3019397 event pairs, 229706 based on Foata normal form. 65615/406000 useless extension candidates. Maximal degree in co-relation 71768. Up to 301814 conditions per place. [2022-12-13 14:49:53,244 INFO L137 encePairwiseOnDemand]: 326/357 looper letters, 78 selfloop transitions, 2 changer transitions 1/99 dead transitions. [2022-12-13 14:49:53,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 404 flow [2022-12-13 14:49:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:49:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:49:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2022-12-13 14:49:53,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5835667600373483 [2022-12-13 14:49:53,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2022-12-13 14:49:53,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2022-12-13 14:49:53,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:49:53,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2022-12-13 14:49:53,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 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 14:49:53,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:49:53,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:49:53,249 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 240 flow. Second operand 3 states and 625 transitions. [2022-12-13 14:49:53,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 404 flow [2022-12-13 14:49:53,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:49:53,252 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 186 flow [2022-12-13 14:49:53,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2022-12-13 14:49:53,253 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 14:49:53,253 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 186 flow [2022-12-13 14:49:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:53,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:53,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:49:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 14:49:53,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:49:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 47510, now seen corresponding path program 1 times [2022-12-13 14:49:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:53,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422153539] [2022-12-13 14:49:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:53,287 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 14:49:53,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:53,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422153539] [2022-12-13 14:49:53,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422153539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:49:53,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:49:53,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:49:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299037877] [2022-12-13 14:49:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:49:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:49:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:49:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:49:53,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 357 [2022-12-13 14:49:53,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:53,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:53,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 357 [2022-12-13 14:49:53,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:50:14,126 INFO L130 PetriNetUnfolder]: 253367/352994 cut-off events. [2022-12-13 14:50:14,126 INFO L131 PetriNetUnfolder]: For 17335/17335 co-relation queries the response was YES. [2022-12-13 14:50:14,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699000 conditions, 352994 events. 253367/352994 cut-off events. For 17335/17335 co-relation queries the response was YES. Maximal size of possible extension queue 7982. Compared 2792622 event pairs, 187350 based on Foata normal form. 0/327527 useless extension candidates. Maximal degree in co-relation 630052. Up to 331930 conditions per place. [2022-12-13 14:50:15,938 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 58 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 14:50:15,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 324 flow [2022-12-13 14:50:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:50:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:50:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2022-12-13 14:50:15,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5256769374416433 [2022-12-13 14:50:15,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2022-12-13 14:50:15,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2022-12-13 14:50:15,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:50:15,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2022-12-13 14:50:15,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 14:50:15,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:50:15,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:50:15,943 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 186 flow. Second operand 3 states and 563 transitions. [2022-12-13 14:50:15,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 324 flow [2022-12-13 14:50:19,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:50:19,635 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 196 flow [2022-12-13 14:50:19,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-12-13 14:50:19,635 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 14:50:19,635 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 196 flow [2022-12-13 14:50:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:50:19,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:50:19,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:50:19,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 14:50:19,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:50:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:50:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 967664978, now seen corresponding path program 1 times [2022-12-13 14:50:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:50:19,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456450873] [2022-12-13 14:50:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:50:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:50:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:50:19,680 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 14:50:19,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:50:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456450873] [2022-12-13 14:50:19,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456450873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:50:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061593985] [2022-12-13 14:50:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:50:19,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:50:19,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:50:19,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:50:19,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:50:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:50:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:50:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:50:19,751 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 14:50:19,779 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 14:50:19,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:50:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:50:19,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061593985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:50:19,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:50:19,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 14:50:19,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212941606] [2022-12-13 14:50:19,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:50:19,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:50:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:50:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:50:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:50:19,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2022-12-13 14:50:19,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 165.71428571428572) internal successors, (1160), 7 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:50:19,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:50:19,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2022-12-13 14:50:19,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:50:39,840 INFO L130 PetriNetUnfolder]: 257974/345955 cut-off events. [2022-12-13 14:50:39,840 INFO L131 PetriNetUnfolder]: For 15108/15108 co-relation queries the response was YES. [2022-12-13 14:50:40,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707852 conditions, 345955 events. 257974/345955 cut-off events. For 15108/15108 co-relation queries the response was YES. Maximal size of possible extension queue 7728. Compared 2587250 event pairs, 5440 based on Foata normal form. 8/319938 useless extension candidates. Maximal degree in co-relation 99617. Up to 276748 conditions per place. [2022-12-13 14:50:41,403 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 146 selfloop transitions, 8 changer transitions 0/172 dead transitions. [2022-12-13 14:50:41,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 172 transitions, 731 flow [2022-12-13 14:50:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:50:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:50:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1142 transitions. [2022-12-13 14:50:41,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5331465919701214 [2022-12-13 14:50:41,405 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1142 transitions. [2022-12-13 14:50:41,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1142 transitions. [2022-12-13 14:50:41,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:50:41,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1142 transitions. [2022-12-13 14:50:41,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.33333333333334) internal successors, (1142), 6 states have internal predecessors, (1142), 0 states have call successors, (0), 0 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 14:50:41,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 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 14:50:41,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 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 14:50:41,411 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 196 flow. Second operand 6 states and 1142 transitions. [2022-12-13 14:50:41,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 172 transitions, 731 flow [2022-12-13 14:50:41,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 172 transitions, 729 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:50:41,443 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 250 flow [2022-12-13 14:50:41,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2022-12-13 14:50:41,444 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 8 predicate places. [2022-12-13 14:50:41,444 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 250 flow [2022-12-13 14:50:41,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.71428571428572) internal successors, (1160), 7 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:50:41,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:50:41,445 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 14:50:41,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:50:41,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:50:41,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:50:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:50:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1894981357, now seen corresponding path program 1 times [2022-12-13 14:50:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:50:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868455091] [2022-12-13 14:50:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:50:41,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:50:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:50:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:50:41,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:50:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868455091] [2022-12-13 14:50:41,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868455091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:50:41,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:50:41,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:50:41,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626830342] [2022-12-13 14:50:41,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:50:41,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:50:41,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:50:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:50:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:50:41,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 357 [2022-12-13 14:50:41,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 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 14:50:41,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:50:41,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 357 [2022-12-13 14:50:41,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:51:30,584 INFO L130 PetriNetUnfolder]: 553830/757685 cut-off events. [2022-12-13 14:51:30,584 INFO L131 PetriNetUnfolder]: For 185347/185347 co-relation queries the response was YES. [2022-12-13 14:51:32,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599372 conditions, 757685 events. 553830/757685 cut-off events. For 185347/185347 co-relation queries the response was YES. Maximal size of possible extension queue 14330. Compared 6044884 event pairs, 228407 based on Foata normal form. 0/727107 useless extension candidates. Maximal degree in co-relation 924002. Up to 514973 conditions per place. [2022-12-13 14:51:34,766 INFO L137 encePairwiseOnDemand]: 346/357 looper letters, 107 selfloop transitions, 10 changer transitions 0/132 dead transitions. [2022-12-13 14:51:34,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 132 transitions, 682 flow [2022-12-13 14:51:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:51:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:51:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2022-12-13 14:51:34,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2022-12-13 14:51:34,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2022-12-13 14:51:34,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2022-12-13 14:51:34,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:51:34,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2022-12-13 14:51:34,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 14:51:34,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:51:34,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:51:34,773 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 250 flow. Second operand 3 states and 595 transitions. [2022-12-13 14:51:34,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 132 transitions, 682 flow [2022-12-13 14:51:35,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 132 transitions, 675 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 14:51:35,002 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 324 flow [2022-12-13 14:51:35,002 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-12-13 14:51:35,003 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 11 predicate places. [2022-12-13 14:51:35,003 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 324 flow [2022-12-13 14:51:35,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 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 14:51:35,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:51:35,003 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:51:35,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 14:51:35,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:51:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:51:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash 340928962, now seen corresponding path program 1 times [2022-12-13 14:51:35,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:51:35,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238630836] [2022-12-13 14:51:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:51:35,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:51:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:51:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:51:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:51:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238630836] [2022-12-13 14:51:35,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238630836] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:51:35,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:51:35,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:51:35,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347783229] [2022-12-13 14:51:35,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:51:35,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:51:35,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:51:35,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:51:35,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:51:35,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 357 [2022-12-13 14:51:35,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 14:51:35,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:51:35,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 357 [2022-12-13 14:51:35,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:52:21,334 INFO L130 PetriNetUnfolder]: 462524/645003 cut-off events. [2022-12-13 14:52:21,335 INFO L131 PetriNetUnfolder]: For 306729/306760 co-relation queries the response was YES. [2022-12-13 14:52:23,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495271 conditions, 645003 events. 462524/645003 cut-off events. For 306729/306760 co-relation queries the response was YES. Maximal size of possible extension queue 12810. Compared 5332937 event pairs, 281924 based on Foata normal form. 14420/629396 useless extension candidates. Maximal degree in co-relation 334377. Up to 408664 conditions per place. [2022-12-13 14:52:25,428 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 102 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2022-12-13 14:52:25,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 656 flow [2022-12-13 14:52:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:52:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:52:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-12-13 14:52:25,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5527544351073763 [2022-12-13 14:52:25,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-12-13 14:52:25,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-12-13 14:52:25,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:52:25,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-12-13 14:52:25,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 14:52:25,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:52:25,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 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 14:52:25,434 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 324 flow. Second operand 3 states and 592 transitions. [2022-12-13 14:52:25,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 656 flow [2022-12-13 14:52:33,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 626 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:52:33,971 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 320 flow [2022-12-13 14:52:33,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-12-13 14:52:33,971 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2022-12-13 14:52:33,971 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 320 flow [2022-12-13 14:52:33,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 14:52:33,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:52:33,972 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:52:33,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 14:52:33,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:52:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:52:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash 340928888, now seen corresponding path program 1 times [2022-12-13 14:52:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:52:33,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665673234] [2022-12-13 14:52:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:52:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:52:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:52:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:52:34,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:52:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665673234] [2022-12-13 14:52:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665673234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:52:34,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:52:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:52:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605605039] [2022-12-13 14:52:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:52:34,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:52:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:52:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:52:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:52:34,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 357 [2022-12-13 14:52:34,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 14:52:34,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:52:34,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 357 [2022-12-13 14:52:34,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:53:15,312 INFO L130 PetriNetUnfolder]: 416448/584441 cut-off events. [2022-12-13 14:53:15,312 INFO L131 PetriNetUnfolder]: For 277655/277681 co-relation queries the response was YES. [2022-12-13 14:53:16,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365419 conditions, 584441 events. 416448/584441 cut-off events. For 277655/277681 co-relation queries the response was YES. Maximal size of possible extension queue 11494. Compared 4826768 event pairs, 267431 based on Foata normal form. 0/562511 useless extension candidates. Maximal degree in co-relation 791157. Up to 385385 conditions per place. [2022-12-13 14:53:18,905 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 131 selfloop transitions, 6 changer transitions 0/158 dead transitions. [2022-12-13 14:53:18,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 792 flow [2022-12-13 14:53:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:53:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:53:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 776 transitions. [2022-12-13 14:53:18,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5434173669467787 [2022-12-13 14:53:18,908 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 776 transitions. [2022-12-13 14:53:18,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 776 transitions. [2022-12-13 14:53:18,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:53:18,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 776 transitions. [2022-12-13 14:53:18,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 14:53:18,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 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 14:53:18,911 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 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 14:53:18,912 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 320 flow. Second operand 4 states and 776 transitions. [2022-12-13 14:53:18,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 792 flow [2022-12-13 14:53:42,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 158 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:53:42,456 INFO L231 Difference]: Finished difference. Result has 92 places, 85 transitions, 334 flow [2022-12-13 14:53:42,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=92, PETRI_TRANSITIONS=85} [2022-12-13 14:53:42,456 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-12-13 14:53:42,457 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 85 transitions, 334 flow [2022-12-13 14:53:42,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 14:53:42,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:53:42,457 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:53:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 14:53:42,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:53:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:53:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash 91005067, now seen corresponding path program 1 times [2022-12-13 14:53:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:53:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377573375] [2022-12-13 14:53:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:53:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:53:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:53:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:53:42,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:53:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377573375] [2022-12-13 14:53:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377573375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:53:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155437096] [2022-12-13 14:53:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:53:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:53:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:53:42,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:53:42,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:53:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:53:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:53:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:53:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:53:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:53:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:53:42,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155437096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:53:42,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:53:42,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 14:53:42,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634620273] [2022-12-13 14:53:42,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:53:42,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:53:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:53:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:53:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:53:42,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 357 [2022-12-13 14:53:42,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 85 transitions, 334 flow. Second operand has 9 states, 9 states have (on average 170.11111111111111) internal successors, (1531), 9 states have internal predecessors, (1531), 0 states have call successors, (0), 0 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 14:53:42,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:53:42,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 357 [2022-12-13 14:53:42,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:53:49,699 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1386] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][134], [326#(< |ULTIMATE.start_main_~i~0#1| 9999), Black: 256#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 20#L702-4true, Black: 195#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 36#L702-12true, 52#L702-12true, Black: 236#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 221#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 217#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 115#L707-13true, t_funThread1of4ForFork0InUse, Black: 244#(= ~global~0 0), t_funThread2of4ForFork0InUse, 255#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), t_funThread3of4ForFork0InUse, 198#true, t_funThread4of4ForFork0InUse, Black: 250#(= |ULTIMATE.start_main_~i~1#1| 0), 82#L702-13true]) [2022-12-13 14:53:49,699 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2022-12-13 14:53:49,699 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 14:53:49,699 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 14:53:49,699 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 14:53:49,920 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1386] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][134], [326#(< |ULTIMATE.start_main_~i~0#1| 9999), Black: 256#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 20#L702-4true, Black: 195#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 36#L702-12true, 52#L702-12true, Black: 236#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 198#true, Black: 217#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, Black: 244#(= ~global~0 0), t_funThread2of4ForFork0InUse, 255#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 221#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse, Black: 250#(= |ULTIMATE.start_main_~i~1#1| 0), 82#L702-13true, 55#L707-7true]) [2022-12-13 14:53:49,920 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,920 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,920 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,921 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,921 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1386] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][134], [326#(< |ULTIMATE.start_main_~i~0#1| 9999), Black: 256#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 20#L702-4true, Black: 195#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 66#ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 36#L702-12true, 52#L702-12true, Black: 236#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 221#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 217#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, Black: 244#(= ~global~0 0), t_funThread2of4ForFork0InUse, 255#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), t_funThread3of4ForFork0InUse, 198#true, t_funThread4of4ForFork0InUse, Black: 250#(= |ULTIMATE.start_main_~i~1#1| 0), 82#L702-13true]) [2022-12-13 14:53:49,921 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,921 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,921 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:49,921 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:50,792 INFO L130 PetriNetUnfolder]: 85150/118699 cut-off events. [2022-12-13 14:53:50,792 INFO L131 PetriNetUnfolder]: For 139138/139210 co-relation queries the response was YES. [2022-12-13 14:53:51,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315906 conditions, 118699 events. 85150/118699 cut-off events. For 139138/139210 co-relation queries the response was YES. Maximal size of possible extension queue 3368. Compared 858080 event pairs, 13290 based on Foata normal form. 6632/120900 useless extension candidates. Maximal degree in co-relation 315891. Up to 81505 conditions per place. [2022-12-13 14:53:51,454 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 119 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2022-12-13 14:53:51,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 670 flow [2022-12-13 14:53:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:53:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:53:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1287 transitions. [2022-12-13 14:53:51,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5150060024009604 [2022-12-13 14:53:51,457 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1287 transitions. [2022-12-13 14:53:51,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1287 transitions. [2022-12-13 14:53:51,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:53:51,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1287 transitions. [2022-12-13 14:53:51,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 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 14:53:51,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 14:53:51,462 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 14:53:51,462 INFO L175 Difference]: Start difference. First operand has 92 places, 85 transitions, 334 flow. Second operand 7 states and 1287 transitions. [2022-12-13 14:53:51,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 670 flow [2022-12-13 14:53:51,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 142 transitions, 653 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 14:53:51,502 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 215 flow [2022-12-13 14:53:51,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2022-12-13 14:53:51,502 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 7 predicate places. [2022-12-13 14:53:51,503 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 215 flow [2022-12-13 14:53:51,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.11111111111111) internal successors, (1531), 9 states have internal predecessors, (1531), 0 states have call successors, (0), 0 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 14:53:51,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:53:51,503 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 14:53:51,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:53:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:53:51,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:53:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:53:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 875253952, now seen corresponding path program 1 times [2022-12-13 14:53:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:53:51,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554361408] [2022-12-13 14:53:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:53:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:53:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:53:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:53:51,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:53:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554361408] [2022-12-13 14:53:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554361408] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:53:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850978701] [2022-12-13 14:53:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:53:51,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:53:51,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:53:51,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:53:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:53:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:53:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:53:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:53:51,921 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 14:53:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:53:52,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:53:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:53:52,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850978701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:53:52,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:53:52,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 14:53:52,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245592495] [2022-12-13 14:53:52,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:53:52,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:53:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:53:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:53:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:53:52,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 357 [2022-12-13 14:53:52,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 215 flow. Second operand has 17 states, 17 states have (on average 165.47058823529412) internal successors, (2813), 17 states have internal predecessors, (2813), 0 states have call successors, (0), 0 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 14:53:52,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:53:52,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 357 [2022-12-13 14:53:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:53:58,269 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1386] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][133], [326#(< |ULTIMATE.start_main_~i~0#1| 9999), Black: 256#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 20#L702-4true, Black: 195#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 491#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 36#L702-12true, 52#L702-12true, Black: 236#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 221#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 217#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 115#L707-13true, t_funThread1of4ForFork0InUse, Black: 244#(= ~global~0 0), 255#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), t_funThread2of4ForFork0InUse, t_funThread3of4ForFork0InUse, 198#true, t_funThread4of4ForFork0InUse, Black: 250#(= |ULTIMATE.start_main_~i~1#1| 0), 82#L702-13true]) [2022-12-13 14:53:58,269 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2022-12-13 14:53:58,269 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 14:53:58,269 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 14:53:58,269 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2022-12-13 14:53:58,440 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1386] L702-11-->L702-13: Formula: (= |v_t_funThread4of4ForFork0_#t~post7_12| (+ v_~global~0_133 1)) InVars {t_funThread4of4ForFork0_#t~post7=|v_t_funThread4of4ForFork0_#t~post7_12|} OutVars{~global~0=v_~global~0_133} AuxVars[] AssignedVars[~global~0, t_funThread4of4ForFork0_#t~post7][133], [326#(< |ULTIMATE.start_main_~i~0#1| 9999), Black: 256#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 20#L702-4true, Black: 195#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 491#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 4) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), 36#L702-12true, 52#L702-12true, Black: 236#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| 8 (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), Black: 198#true, Black: 217#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), t_funThread1of4ForFork0InUse, Black: 244#(= ~global~0 0), 255#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (= (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|) 40000)), t_funThread2of4ForFork0InUse, 221#(and (<= (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~#t_ids~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))), t_funThread3of4ForFork0InUse, t_funThread4of4ForFork0InUse, Black: 250#(= |ULTIMATE.start_main_~i~1#1| 0), 82#L702-13true, 55#L707-7true]) [2022-12-13 14:53:58,440 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2022-12-13 14:53:58,440 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:58,440 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:58,440 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-12-13 14:53:59,089 INFO L130 PetriNetUnfolder]: 65970/95564 cut-off events. [2022-12-13 14:53:59,089 INFO L131 PetriNetUnfolder]: For 79424/79478 co-relation queries the response was YES. [2022-12-13 14:53:59,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237044 conditions, 95564 events. 65970/95564 cut-off events. For 79424/79478 co-relation queries the response was YES. Maximal size of possible extension queue 2844. Compared 730128 event pairs, 3708 based on Foata normal form. 6354/98984 useless extension candidates. Maximal degree in co-relation 237029. Up to 57674 conditions per place. [2022-12-13 14:53:59,622 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 118 selfloop transitions, 5 changer transitions 0/141 dead transitions. [2022-12-13 14:53:59,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 141 transitions, 651 flow [2022-12-13 14:53:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:53:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:53:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1256 transitions. [2022-12-13 14:53:59,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5026010404161665 [2022-12-13 14:53:59,626 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1256 transitions. [2022-12-13 14:53:59,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1256 transitions. [2022-12-13 14:53:59,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:53:59,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1256 transitions. [2022-12-13 14:53:59,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.42857142857142) internal successors, (1256), 7 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 14:53:59,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 14:53:59,634 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 14:53:59,634 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 215 flow. Second operand 7 states and 1256 transitions. [2022-12-13 14:53:59,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 141 transitions, 651 flow [2022-12-13 14:53:59,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 141 transitions, 632 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 14:53:59,669 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 196 flow [2022-12-13 14:53:59,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2022-12-13 14:53:59,670 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-12-13 14:53:59,670 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 196 flow [2022-12-13 14:53:59,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 165.47058823529412) internal successors, (2813), 17 states have internal predecessors, (2813), 0 states have call successors, (0), 0 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 14:53:59,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:53:59,670 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 14:53:59,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 14:53:59,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8ba880-74e0-4c7a-81af-146c12e2d8bd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:53:59,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:53:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:53:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1363070068, now seen corresponding path program 1 times [2022-12-13 14:53:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:53:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564215144] [2022-12-13 14:53:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:53:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:53:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:53:59,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:53:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:53:59,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:53:59,918 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:53:59,918 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 14:53:59,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 14:53:59,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 14:53:59,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 14:53:59,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 14:53:59,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 14:53:59,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 14:53:59,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 14:53:59,919 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:53:59,919 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:53:59,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 14:53:59,939 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 14:53:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 540 flow [2022-12-13 14:54:00,096 INFO L130 PetriNetUnfolder]: 140/1060 cut-off events. [2022-12-13 14:54:00,096 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 14:54:00,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 1060 events. 140/1060 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5312 event pairs, 23 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 691. Up to 80 conditions per place. [2022-12-13 14:54:00,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 240 transitions, 540 flow [2022-12-13 14:54:00,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 240 transitions, 540 flow [2022-12-13 14:54:00,105 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:54:00,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 240 transitions, 540 flow [2022-12-13 14:54:00,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 240 transitions, 540 flow [2022-12-13 14:54:00,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 540 flow [2022-12-13 14:54:00,205 INFO L130 PetriNetUnfolder]: 140/1060 cut-off events. [2022-12-13 14:54:00,205 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 14:54:00,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 1060 events. 140/1060 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5312 event pairs, 23 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 691. Up to 80 conditions per place. [2022-12-13 14:54:00,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 32200 [2022-12-13 14:54:02,579 INFO L134 LiptonReduction]: Checked pairs total: 98664 [2022-12-13 14:54:02,579 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-12-13 14:54:02,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:54:02,580 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;@69418461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:54:02,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 14:54:02,581 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 14:54:02,581 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:54:02,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:54:02,581 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:54:02,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:54:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:54:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash 61350, now seen corresponding path program 1 times [2022-12-13 14:54:02,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:54:02,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239860686] [2022-12-13 14:54:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:54:02,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:54:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:54:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:54:02,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:54:02,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239860686] [2022-12-13 14:54:02,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239860686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:54:02,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:54:02,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:54:02,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928295332] [2022-12-13 14:54:02,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:54:02,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:54:02,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:54:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:54:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:54:02,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 402 [2022-12-13 14:54:02,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 14:54:02,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:54:02,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 402 [2022-12-13 14:54:02,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand