./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.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_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/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_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/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_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --- 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 17:13:18,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:13:18,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:13:18,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:13:18,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:13:18,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:13:18,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:13:18,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:13:18,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:13:18,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:13:18,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:13:18,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:13:18,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:13:18,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:13:18,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:13:18,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:13:18,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:13:18,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:13:18,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:13:18,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:13:18,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:13:18,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:13:18,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:13:18,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:13:18,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:13:18,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:13:18,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:13:18,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:13:18,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:13:18,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:13:18,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:13:18,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:13:18,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:13:18,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:13:18,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:13:18,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:13:18,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:13:18,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:13:18,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:13:18,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:13:18,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:13:18,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:13:18,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:13:18,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:13:18,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:13:18,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:13:18,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:13:18,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:13:18,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:13:18,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:13:18,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:13:18,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:13:18,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:13:18,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:13:18,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:13:18,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:13:18,860 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:13:18,860 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_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef [2022-12-13 17:13:19,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:13:19,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:13:19,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:13:19,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:13:19,040 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:13:19,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-12-13 17:13:21,659 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:13:21,851 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:13:21,852 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-12-13 17:13:21,864 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/data/93b5fea73/1c3537bccb8941dd9ed616b845663f4c/FLAG0ad48ec7c [2022-12-13 17:13:21,877 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/data/93b5fea73/1c3537bccb8941dd9ed616b845663f4c [2022-12-13 17:13:21,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:13:21,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:13:21,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:13:21,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:13:21,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:13:21,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:13:21" (1/1) ... [2022-12-13 17:13:21,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a140035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:21, skipping insertion in model container [2022-12-13 17:13:21,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:13:21" (1/1) ... [2022-12-13 17:13:21,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:13:21,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:13:22,263 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_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2022-12-13 17:13:22,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:13:22,293 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:13:22,326 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_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2022-12-13 17:13:22,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:13:22,382 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:13:22,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22 WrapperNode [2022-12-13 17:13:22,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:13:22,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:13:22,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:13:22,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:13:22,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,427 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-12-13 17:13:22,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:13:22,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:13:22,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:13:22,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:13:22,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,454 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:13:22,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:13:22,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:13:22,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:13:22,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (1/1) ... [2022-12-13 17:13:22,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:13:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:13:22,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:13:22,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:13:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:13:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:13:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:13:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:13:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:13:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:13:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 17:13:22,524 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 17:13:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:13:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:13:22,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:13:22,526 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 17:13:22,637 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:13:22,639 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:13:22,832 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:13:22,838 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:13:22,838 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 17:13:22,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:13:22 BoogieIcfgContainer [2022-12-13 17:13:22,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:13:22,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:13:22,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:13:22,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:13:22,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:13:21" (1/3) ... [2022-12-13 17:13:22,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a01f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:13:22, skipping insertion in model container [2022-12-13 17:13:22,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:13:22" (2/3) ... [2022-12-13 17:13:22,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a01f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:13:22, skipping insertion in model container [2022-12-13 17:13:22,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:13:22" (3/3) ... [2022-12-13 17:13:22,847 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2022-12-13 17:13:22,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:13:22,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 17:13:22,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:13:22,905 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 17:13:22,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 134 transitions, 276 flow [2022-12-13 17:13:23,004 INFO L130 PetriNetUnfolder]: 23/186 cut-off events. [2022-12-13 17:13:23,005 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:13:23,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 23/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 474 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-12-13 17:13:23,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 134 transitions, 276 flow [2022-12-13 17:13:23,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 134 transitions, 276 flow [2022-12-13 17:13:23,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:13:23,031 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 134 transitions, 276 flow [2022-12-13 17:13:23,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 134 transitions, 276 flow [2022-12-13 17:13:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 134 transitions, 276 flow [2022-12-13 17:13:23,073 INFO L130 PetriNetUnfolder]: 23/186 cut-off events. [2022-12-13 17:13:23,073 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:13:23,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 23/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 474 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-12-13 17:13:23,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2022-12-13 17:13:25,702 INFO L134 LiptonReduction]: Checked pairs total: 5867 [2022-12-13 17:13:25,702 INFO L136 LiptonReduction]: Total number of compositions: 123 [2022-12-13 17:13:25,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:13:25,721 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;@349a3a48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:13:25,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:13:25,723 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 17:13:25,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:13:25,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:25,724 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:25,725 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 17:13:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 16434, now seen corresponding path program 1 times [2022-12-13 17:13:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48162439] [2022-12-13 17:13:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:25,979 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 17:13:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:25,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48162439] [2022-12-13 17:13:25,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48162439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:25,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:25,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559831269] [2022-12-13 17:13:25,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:25,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:25,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:26,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 257 [2022-12-13 17:13:26,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:26,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 257 [2022-12-13 17:13:26,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:26,147 INFO L130 PetriNetUnfolder]: 137/310 cut-off events. [2022-12-13 17:13:26,147 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:13:26,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 310 events. 137/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1552 event pairs, 0 based on Foata normal form. 17/241 useless extension candidates. Maximal degree in co-relation 579. Up to 289 conditions per place. [2022-12-13 17:13:26,149 INFO L137 encePairwiseOnDemand]: 244/257 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2022-12-13 17:13:26,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 168 flow [2022-12-13 17:13:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:13:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:13:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-12-13 17:13:26,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5201037613488976 [2022-12-13 17:13:26,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-12-13 17:13:26,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-12-13 17:13:26,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:26,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-12-13 17:13:26,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,175 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 401 transitions. [2022-12-13 17:13:26,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 168 flow [2022-12-13 17:13:26,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:13:26,180 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 80 flow [2022-12-13 17:13:26,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-12-13 17:13:26,184 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-12-13 17:13:26,184 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 80 flow [2022-12-13 17:13:26,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:26,185 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:26,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:13:26,185 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 17:13:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash 16433, now seen corresponding path program 1 times [2022-12-13 17:13:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:26,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473192033] [2022-12-13 17:13:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:26,236 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 17:13:26,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473192033] [2022-12-13 17:13:26,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473192033] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:26,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:26,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:26,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19032061] [2022-12-13 17:13:26,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:26,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:26,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:26,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 257 [2022-12-13 17:13:26,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 80 flow. Second operand has 3 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 17:13:26,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:26,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 257 [2022-12-13 17:13:26,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:26,329 INFO L130 PetriNetUnfolder]: 113/250 cut-off events. [2022-12-13 17:13:26,329 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 17:13:26,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 250 events. 113/250 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 939 event pairs, 96 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 524. Up to 228 conditions per place. [2022-12-13 17:13:26,331 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-12-13 17:13:26,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 160 flow [2022-12-13 17:13:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:13:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:13:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2022-12-13 17:13:26,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48249027237354086 [2022-12-13 17:13:26,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2022-12-13 17:13:26,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2022-12-13 17:13:26,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:26,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2022-12-13 17:13:26,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,336 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 80 flow. Second operand 3 states and 372 transitions. [2022-12-13 17:13:26,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 160 flow [2022-12-13 17:13:26,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:13:26,337 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2022-12-13 17:13:26,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2022-12-13 17:13:26,338 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2022-12-13 17:13:26,338 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2022-12-13 17:13:26,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 17:13:26,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:26,338 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:13:26,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:13:26,339 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 17:13:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:26,339 INFO L85 PathProgramCache]: Analyzing trace with hash 489887548, now seen corresponding path program 1 times [2022-12-13 17:13:26,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:26,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875720028] [2022-12-13 17:13:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:26,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:26,419 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 17:13:26,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:26,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875720028] [2022-12-13 17:13:26,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875720028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:13:26,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510868504] [2022-12-13 17:13:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:26,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:13:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:13:26,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:13:26,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:13:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:26,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:13:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:13:26,540 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 17:13:26,565 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 17:13:26,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:13:26,598 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 17:13:26,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510868504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:13:26,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:13:26,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 17:13:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477206517] [2022-12-13 17:13:26,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:13:26,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:13:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:13:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:13:26,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 257 [2022-12-13 17:13:26,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 113.71428571428571) internal successors, (796), 7 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:26,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 257 [2022-12-13 17:13:26,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:26,710 INFO L130 PetriNetUnfolder]: 16/55 cut-off events. [2022-12-13 17:13:26,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:13:26,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 55 events. 16/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 118. Up to 34 conditions per place. [2022-12-13 17:13:26,711 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-13 17:13:26,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 97 flow [2022-12-13 17:13:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:13:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:13:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2022-12-13 17:13:26,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591439688715953 [2022-12-13 17:13:26,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2022-12-13 17:13:26,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2022-12-13 17:13:26,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:26,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2022-12-13 17:13:26,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,717 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,717 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 4 states and 472 transitions. [2022-12-13 17:13:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 97 flow [2022-12-13 17:13:26,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:13:26,718 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 38 flow [2022-12-13 17:13:26,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2022-12-13 17:13:26,719 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -11 predicate places. [2022-12-13 17:13:26,719 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 38 flow [2022-12-13 17:13:26,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.71428571428571) internal successors, (796), 7 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:26,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:26,724 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:13:26,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:13:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 17:13:26,926 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 17:13:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1993354898, now seen corresponding path program 1 times [2022-12-13 17:13:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:26,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84505505] [2022-12-13 17:13:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:26,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:13:26,980 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:13:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:13:27,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:13:27,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:13:27,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 17:13:27,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 17:13:27,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 17:13:27,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 17:13:27,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 17:13:27,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 17:13:27,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 17:13:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:13:27,052 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 17:13:27,055 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:13:27,055 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:13:27,072 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:13:27,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 346 flow [2022-12-13 17:13:27,096 INFO L130 PetriNetUnfolder]: 40/298 cut-off events. [2022-12-13 17:13:27,096 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:13:27,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 40/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 928 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 188. Up to 9 conditions per place. [2022-12-13 17:13:27,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 164 transitions, 346 flow [2022-12-13 17:13:27,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 164 transitions, 346 flow [2022-12-13 17:13:27,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:13:27,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 164 transitions, 346 flow [2022-12-13 17:13:27,100 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 164 transitions, 346 flow [2022-12-13 17:13:27,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 346 flow [2022-12-13 17:13:27,122 INFO L130 PetriNetUnfolder]: 40/298 cut-off events. [2022-12-13 17:13:27,122 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:13:27,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 298 events. 40/298 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 928 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 188. Up to 9 conditions per place. [2022-12-13 17:13:27,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 8680 [2022-12-13 17:13:29,680 INFO L134 LiptonReduction]: Checked pairs total: 19594 [2022-12-13 17:13:29,680 INFO L136 LiptonReduction]: Total number of compositions: 134 [2022-12-13 17:13:29,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:13:29,682 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;@349a3a48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:13:29,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:13:29,683 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 17:13:29,683 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:13:29,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:29,683 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:29,683 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 17:13:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 26935, now seen corresponding path program 1 times [2022-12-13 17:13:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:29,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189611853] [2022-12-13 17:13:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:29,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:29,714 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 17:13:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189611853] [2022-12-13 17:13:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189611853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:29,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:29,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906920721] [2022-12-13 17:13:29,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:29,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:29,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 298 [2022-12-13 17:13:29,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:29,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:29,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 298 [2022-12-13 17:13:29,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:30,053 INFO L130 PetriNetUnfolder]: 1812/3274 cut-off events. [2022-12-13 17:13:30,054 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-12-13 17:13:30,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6265 conditions, 3274 events. 1812/3274 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20684 event pairs, 1484 based on Foata normal form. 369/3048 useless extension candidates. Maximal degree in co-relation 3216. Up to 2530 conditions per place. [2022-12-13 17:13:30,069 INFO L137 encePairwiseOnDemand]: 279/298 looper letters, 46 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2022-12-13 17:13:30,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 236 flow [2022-12-13 17:13:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:13:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:13:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-12-13 17:13:30,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5357941834451901 [2022-12-13 17:13:30,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-12-13 17:13:30,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-12-13 17:13:30,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:30,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-12-13 17:13:30,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,076 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 479 transitions. [2022-12-13 17:13:30,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 236 flow [2022-12-13 17:13:30,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 60 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:13:30,079 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 112 flow [2022-12-13 17:13:30,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2022-12-13 17:13:30,080 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2022-12-13 17:13:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 112 flow [2022-12-13 17:13:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:30,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:13:30,081 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 17:13:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash 26933, now seen corresponding path program 1 times [2022-12-13 17:13:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139379206] [2022-12-13 17:13:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:30,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:30,138 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 17:13:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:30,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139379206] [2022-12-13 17:13:30,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139379206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:30,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:30,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499014950] [2022-12-13 17:13:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:30,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:30,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 298 [2022-12-13 17:13:30,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:30,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 298 [2022-12-13 17:13:30,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:30,469 INFO L130 PetriNetUnfolder]: 1686/3014 cut-off events. [2022-12-13 17:13:30,469 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-12-13 17:13:30,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 3014 events. 1686/3014 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18451 event pairs, 1324 based on Foata normal form. 0/2602 useless extension candidates. Maximal degree in co-relation 5364. Up to 2717 conditions per place. [2022-12-13 17:13:30,483 INFO L137 encePairwiseOnDemand]: 293/298 looper letters, 40 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-12-13 17:13:30,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 212 flow [2022-12-13 17:13:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:13:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:13:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2022-12-13 17:13:30,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5100671140939598 [2022-12-13 17:13:30,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2022-12-13 17:13:30,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2022-12-13 17:13:30,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:30,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2022-12-13 17:13:30,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,487 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 112 flow. Second operand 3 states and 456 transitions. [2022-12-13 17:13:30,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 212 flow [2022-12-13 17:13:30,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:13:30,489 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 124 flow [2022-12-13 17:13:30,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-12-13 17:13:30,490 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2022-12-13 17:13:30,490 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 124 flow [2022-12-13 17:13:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:30,490 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:13:30,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:13:30,491 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 17:13:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash -874990685, now seen corresponding path program 1 times [2022-12-13 17:13:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:30,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077348867] [2022-12-13 17:13:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:30,548 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 17:13:30,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077348867] [2022-12-13 17:13:30,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077348867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:13:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537431148] [2022-12-13 17:13:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:30,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:13:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:13:30,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:13:30,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:13:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:13:30,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:13:30,607 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 17:13:30,643 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 17:13:30,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:13:30,683 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 17:13:30,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537431148] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:13:30,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:13:30,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 17:13:30,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448648824] [2022-12-13 17:13:30,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:13:30,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:13:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:13:30,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:13:30,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 298 [2022-12-13 17:13:30,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:30,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 298 [2022-12-13 17:13:30,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:30,920 INFO L130 PetriNetUnfolder]: 286/567 cut-off events. [2022-12-13 17:13:30,920 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2022-12-13 17:13:30,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 567 events. 286/567 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2784 event pairs, 49 based on Foata normal form. 70/636 useless extension candidates. Maximal degree in co-relation 175. Up to 346 conditions per place. [2022-12-13 17:13:30,925 INFO L137 encePairwiseOnDemand]: 293/298 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2022-12-13 17:13:30,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2022-12-13 17:13:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:13:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:13:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 713 transitions. [2022-12-13 17:13:30,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4785234899328859 [2022-12-13 17:13:30,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 713 transitions. [2022-12-13 17:13:30,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 713 transitions. [2022-12-13 17:13:30,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:30,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 713 transitions. [2022-12-13 17:13:30,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,930 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 124 flow. Second operand 5 states and 713 transitions. [2022-12-13 17:13:30,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2022-12-13 17:13:30,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:13:30,931 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 17:13:30,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 17:13:30,931 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -10 predicate places. [2022-12-13 17:13:30,932 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 17:13:30,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:30,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:30,932 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:13:30,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:13:31,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 17:13:31,133 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 17:13:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1933122222, now seen corresponding path program 1 times [2022-12-13 17:13:31,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540025462] [2022-12-13 17:13:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:13:31,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:13:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:13:31,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:13:31,154 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 17:13:31,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 17:13:31,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:13:31,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 17:13:31,155 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:13:31,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:13:31,172 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:13:31,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 194 transitions, 418 flow [2022-12-13 17:13:31,206 INFO L130 PetriNetUnfolder]: 62/453 cut-off events. [2022-12-13 17:13:31,206 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:13:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 62/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1607 event pairs, 1 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2022-12-13 17:13:31,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 194 transitions, 418 flow [2022-12-13 17:13:31,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 194 transitions, 418 flow [2022-12-13 17:13:31,210 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:13:31,210 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 194 transitions, 418 flow [2022-12-13 17:13:31,210 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 194 transitions, 418 flow [2022-12-13 17:13:31,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 194 transitions, 418 flow [2022-12-13 17:13:31,241 INFO L130 PetriNetUnfolder]: 62/453 cut-off events. [2022-12-13 17:13:31,241 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:13:31,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 62/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1607 event pairs, 1 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2022-12-13 17:13:31,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 15624 [2022-12-13 17:13:33,560 INFO L134 LiptonReduction]: Checked pairs total: 38003 [2022-12-13 17:13:33,560 INFO L136 LiptonReduction]: Total number of compositions: 149 [2022-12-13 17:13:33,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:13:33,561 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;@349a3a48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:13:33,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:13:33,562 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 17:13:33,562 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:13:33,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:33,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:33,562 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 17:13:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash 38873, now seen corresponding path program 1 times [2022-12-13 17:13:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:33,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102984990] [2022-12-13 17:13:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:33,583 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 17:13:33,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:33,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102984990] [2022-12-13 17:13:33,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102984990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:33,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:33,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952456915] [2022-12-13 17:13:33,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:33,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:33,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:33,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:33,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 343 [2022-12-13 17:13:33,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:33,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:33,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 343 [2022-12-13 17:13:33,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:35,689 INFO L130 PetriNetUnfolder]: 20492/31155 cut-off events. [2022-12-13 17:13:35,689 INFO L131 PetriNetUnfolder]: For 719/719 co-relation queries the response was YES. [2022-12-13 17:13:35,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60723 conditions, 31155 events. 20492/31155 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 230949 event pairs, 16947 based on Foata normal form. 7123/33475 useless extension candidates. Maximal degree in co-relation 11896. Up to 24786 conditions per place. [2022-12-13 17:13:35,869 INFO L137 encePairwiseOnDemand]: 318/343 looper letters, 60 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2022-12-13 17:13:35,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 314 flow [2022-12-13 17:13:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:13:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:13:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2022-12-13 17:13:35,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5549076773566569 [2022-12-13 17:13:35,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2022-12-13 17:13:35,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2022-12-13 17:13:35,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:35,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2022-12-13 17:13:35,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:35,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:35,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:35,879 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 192 flow. Second operand 3 states and 571 transitions. [2022-12-13 17:13:35,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 314 flow [2022-12-13 17:13:35,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:13:35,882 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 150 flow [2022-12-13 17:13:35,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-12-13 17:13:35,883 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2022-12-13 17:13:35,883 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 150 flow [2022-12-13 17:13:35,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:35,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:35,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:13:35,884 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 17:13:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 38874, now seen corresponding path program 1 times [2022-12-13 17:13:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549981121] [2022-12-13 17:13:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:35,927 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 17:13:35,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549981121] [2022-12-13 17:13:35,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549981121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:35,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:35,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:35,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576087113] [2022-12-13 17:13:35,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:35,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:35,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 343 [2022-12-13 17:13:35,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:35,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:35,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 343 [2022-12-13 17:13:35,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:37,820 INFO L130 PetriNetUnfolder]: 19018/29073 cut-off events. [2022-12-13 17:13:37,820 INFO L131 PetriNetUnfolder]: For 1199/1199 co-relation queries the response was YES. [2022-12-13 17:13:37,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57162 conditions, 29073 events. 19018/29073 cut-off events. For 1199/1199 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 213022 event pairs, 16283 based on Foata normal form. 0/25723 useless extension candidates. Maximal degree in co-relation 52157. Up to 26881 conditions per place. [2022-12-13 17:13:37,971 INFO L137 encePairwiseOnDemand]: 338/343 looper letters, 48 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 17:13:37,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 266 flow [2022-12-13 17:13:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:13:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:13:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2022-12-13 17:13:37,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5150631681243926 [2022-12-13 17:13:37,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2022-12-13 17:13:37,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2022-12-13 17:13:37,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:37,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2022-12-13 17:13:37,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:37,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:37,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:37,980 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 150 flow. Second operand 3 states and 530 transitions. [2022-12-13 17:13:37,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 266 flow [2022-12-13 17:13:37,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:13:37,998 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 162 flow [2022-12-13 17:13:37,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-12-13 17:13:37,999 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2022-12-13 17:13:37,999 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 162 flow [2022-12-13 17:13:37,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:37,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:37,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:13:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:13:37,999 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 17:13:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1573771698, now seen corresponding path program 1 times [2022-12-13 17:13:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:38,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341078949] [2022-12-13 17:13:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:38,069 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 17:13:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:38,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341078949] [2022-12-13 17:13:38,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341078949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:13:38,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075620819] [2022-12-13 17:13:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:38,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:13:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:13:38,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:13:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:13:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:13:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:13:38,132 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 17:13:38,164 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 17:13:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:13:38,203 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 17:13:38,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075620819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:13:38,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:13:38,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 17:13:38,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221033516] [2022-12-13 17:13:38,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:13:38,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:13:38,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:38,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:13:38,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:13:38,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 343 [2022-12-13 17:13:38,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:38,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:38,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 343 [2022-12-13 17:13:38,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:13:38,907 INFO L130 PetriNetUnfolder]: 3352/5544 cut-off events. [2022-12-13 17:13:38,908 INFO L131 PetriNetUnfolder]: For 2205/2205 co-relation queries the response was YES. [2022-12-13 17:13:38,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12555 conditions, 5544 events. 3352/5544 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 36128 event pairs, 392 based on Foata normal form. 511/6026 useless extension candidates. Maximal degree in co-relation 1849. Up to 3178 conditions per place. [2022-12-13 17:13:38,930 INFO L137 encePairwiseOnDemand]: 338/343 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2022-12-13 17:13:38,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 345 flow [2022-12-13 17:13:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:13:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:13:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2022-12-13 17:13:38,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49076773566569487 [2022-12-13 17:13:38,934 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2022-12-13 17:13:38,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2022-12-13 17:13:38,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:13:38,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2022-12-13 17:13:38,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:38,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 343.0) internal successors, (2401), 7 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:38,939 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 343.0) internal successors, (2401), 7 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:38,939 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 162 flow. Second operand 6 states and 1010 transitions. [2022-12-13 17:13:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 345 flow [2022-12-13 17:13:38,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 337 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:13:38,945 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 17:13:38,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, 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 17:13:38,945 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2022-12-13 17:13:38,945 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 17:13:38,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 156.875) internal successors, (1255), 8 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:38,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:38,946 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:13:38,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 17:13:39,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:13:39,148 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 17:13:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:39,149 INFO L85 PathProgramCache]: Analyzing trace with hash 582710535, now seen corresponding path program 1 times [2022-12-13 17:13:39,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:39,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255338633] [2022-12-13 17:13:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:39,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:13:39,195 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:13:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:13:39,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:13:39,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:13:39,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 17:13:39,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 17:13:39,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 17:13:39,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 17:13:39,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 17:13:39,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 17:13:39,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 17:13:39,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:13:39,214 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 17:13:39,214 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:13:39,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:13:39,235 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:13:39,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 224 transitions, 492 flow [2022-12-13 17:13:39,320 INFO L130 PetriNetUnfolder]: 96/696 cut-off events. [2022-12-13 17:13:39,320 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:13:39,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 696 events. 96/696 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2875 event pairs, 6 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-12-13 17:13:39,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 224 transitions, 492 flow [2022-12-13 17:13:39,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 224 transitions, 492 flow [2022-12-13 17:13:39,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:13:39,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 224 transitions, 492 flow [2022-12-13 17:13:39,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 224 transitions, 492 flow [2022-12-13 17:13:39,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 224 transitions, 492 flow [2022-12-13 17:13:39,408 INFO L130 PetriNetUnfolder]: 96/696 cut-off events. [2022-12-13 17:13:39,408 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:13:39,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 696 events. 96/696 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2875 event pairs, 6 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-12-13 17:13:39,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 24304 [2022-12-13 17:13:42,040 INFO L134 LiptonReduction]: Checked pairs total: 63292 [2022-12-13 17:13:42,040 INFO L136 LiptonReduction]: Total number of compositions: 164 [2022-12-13 17:13:42,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:13:42,041 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;@349a3a48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:13:42,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:13:42,042 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 17:13:42,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:13:42,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:13:42,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:13:42,043 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 17:13:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:13:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash 52241, now seen corresponding path program 1 times [2022-12-13 17:13:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:13:42,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224557794] [2022-12-13 17:13:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:13:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:13:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:13:42,071 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 17:13:42,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:13:42,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224557794] [2022-12-13 17:13:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224557794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:13:42,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:13:42,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:13:42,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645354420] [2022-12-13 17:13:42,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:13:42,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:13:42,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:13:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:13:42,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:13:42,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 388 [2022-12-13 17:13:42,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:13:42,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:13:42,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 388 [2022-12-13 17:13:42,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:20,077 INFO L130 PetriNetUnfolder]: 429340/594085 cut-off events. [2022-12-13 17:14:20,078 INFO L131 PetriNetUnfolder]: For 14614/14614 co-relation queries the response was YES. [2022-12-13 17:14:20,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161061 conditions, 594085 events. 429340/594085 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 12968. Compared 4828975 event pairs, 408072 based on Foata normal form. 96331/615785 useless extension candidates. Maximal degree in co-relation 100337. Up to 558770 conditions per place. [2022-12-13 17:14:22,694 INFO L137 encePairwiseOnDemand]: 357/388 looper letters, 66 selfloop transitions, 2 changer transitions 1/85 dead transitions. [2022-12-13 17:14:22,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 352 flow [2022-12-13 17:14:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:22,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:14:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2022-12-13 17:14:22,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5558419243986255 [2022-12-13 17:14:22,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2022-12-13 17:14:22,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2022-12-13 17:14:22,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:22,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2022-12-13 17:14:22,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:22,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:22,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:22,700 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 647 transitions. [2022-12-13 17:14:22,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 352 flow [2022-12-13 17:14:22,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:14:22,709 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 206 flow [2022-12-13 17:14:22,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2022-12-13 17:14:22,710 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2022-12-13 17:14:22,710 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 206 flow [2022-12-13 17:14:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:22,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:22,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:14:22,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:14:22,710 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 17:14:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 52242, now seen corresponding path program 1 times [2022-12-13 17:14:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604745162] [2022-12-13 17:14:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:22,729 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 17:14:22,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604745162] [2022-12-13 17:14:22,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604745162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:14:22,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:14:22,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:14:22,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155266990] [2022-12-13 17:14:22,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:14:22,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:14:22,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:14:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:14:22,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 388 [2022-12-13 17:14:22,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:22,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:22,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 388 [2022-12-13 17:14:22,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:14:53,550 INFO L130 PetriNetUnfolder]: 349614/482238 cut-off events. [2022-12-13 17:14:53,550 INFO L131 PetriNetUnfolder]: For 27652/27652 co-relation queries the response was YES. [2022-12-13 17:14:54,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971321 conditions, 482238 events. 349614/482238 cut-off events. For 27652/27652 co-relation queries the response was YES. Maximal size of possible extension queue 10611. Compared 3829032 event pairs, 313434 based on Foata normal form. 0/439846 useless extension candidates. Maximal degree in co-relation 971248. Up to 416884 conditions per place. [2022-12-13 17:14:56,173 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 85 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2022-12-13 17:14:56,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 438 flow [2022-12-13 17:14:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:14:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:14:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-12-13 17:14:56,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5343642611683849 [2022-12-13 17:14:56,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-12-13 17:14:56,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-12-13 17:14:56,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:14:56,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-12-13 17:14:56,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:56,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:56,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:56,179 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 206 flow. Second operand 3 states and 622 transitions. [2022-12-13 17:14:56,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 438 flow [2022-12-13 17:14:56,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:14:56,189 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 204 flow [2022-12-13 17:14:56,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2022-12-13 17:14:56,190 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2022-12-13 17:14:56,190 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 204 flow [2022-12-13 17:14:56,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:56,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:14:56,190 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:14:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:14:56,190 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 17:14:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:14:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1046816549, now seen corresponding path program 1 times [2022-12-13 17:14:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:14:56,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847281297] [2022-12-13 17:14:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:56,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:14:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:56,243 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 17:14:56,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:14:56,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847281297] [2022-12-13 17:14:56,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847281297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:14:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582531682] [2022-12-13 17:14:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:14:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:14:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:14:56,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:14:56,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:14:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:14:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:14:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:14:56,317 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 17:14:56,343 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 17:14:56,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:14:56,377 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 17:14:56,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582531682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:14:56,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:14:56,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 17:14:56,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383243648] [2022-12-13 17:14:56,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:14:56,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:14:56,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:14:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:14:56,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:14:56,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 388 [2022-12-13 17:14:56,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:14:56,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:14:56,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 388 [2022-12-13 17:14:56,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:15:25,292 INFO L130 PetriNetUnfolder]: 355314/471668 cut-off events. [2022-12-13 17:15:25,292 INFO L131 PetriNetUnfolder]: For 18889/18889 co-relation queries the response was YES. [2022-12-13 17:15:25,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980050 conditions, 471668 events. 355314/471668 cut-off events. For 18889/18889 co-relation queries the response was YES. Maximal size of possible extension queue 10277. Compared 3529995 event pairs, 6907 based on Foata normal form. 9/442695 useless extension candidates. Maximal degree in co-relation 892838. Up to 380774 conditions per place. [2022-12-13 17:15:27,432 INFO L137 encePairwiseOnDemand]: 381/388 looper letters, 161 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2022-12-13 17:15:27,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 185 transitions, 799 flow [2022-12-13 17:15:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:15:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:15:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1242 transitions. [2022-12-13 17:15:27,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335051546391752 [2022-12-13 17:15:27,436 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1242 transitions. [2022-12-13 17:15:27,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1242 transitions. [2022-12-13 17:15:27,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:15:27,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1242 transitions. [2022-12-13 17:15:27,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:15:27,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:15:27,442 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:15:27,442 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 204 flow. Second operand 6 states and 1242 transitions. [2022-12-13 17:15:27,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 185 transitions, 799 flow [2022-12-13 17:15:50,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 185 transitions, 791 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:15:50,939 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 258 flow [2022-12-13 17:15:50,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2022-12-13 17:15:50,940 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2022-12-13 17:15:50,940 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 258 flow [2022-12-13 17:15:50,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:15:50,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:15:50,941 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 17:15:50,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:15:51,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:15:51,142 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 17:15:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:15:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash 400486054, now seen corresponding path program 1 times [2022-12-13 17:15:51,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:15:51,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512157329] [2022-12-13 17:15:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:15:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:15:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:15:51,233 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 17:15:51,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:15:51,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512157329] [2022-12-13 17:15:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512157329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:15:51,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:15:51,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:15:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840839221] [2022-12-13 17:15:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:15:51,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:15:51,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:15:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:15:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:15:51,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 388 [2022-12-13 17:15:51,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:15:51,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:15:51,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 388 [2022-12-13 17:15:51,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:16:42,258 INFO L130 PetriNetUnfolder]: 586617/798800 cut-off events. [2022-12-13 17:16:42,259 INFO L131 PetriNetUnfolder]: For 185873/185873 co-relation queries the response was YES. [2022-12-13 17:16:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1695387 conditions, 798800 events. 586617/798800 cut-off events. For 185873/185873 co-relation queries the response was YES. Maximal size of possible extension queue 15923. Compared 6351869 event pairs, 239429 based on Foata normal form. 0/761659 useless extension candidates. Maximal degree in co-relation 980950. Up to 554615 conditions per place. [2022-12-13 17:16:46,827 INFO L137 encePairwiseOnDemand]: 377/388 looper letters, 111 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2022-12-13 17:16:46,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 706 flow [2022-12-13 17:16:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:16:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:16:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-12-13 17:16:46,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5506872852233677 [2022-12-13 17:16:46,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-12-13 17:16:46,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-12-13 17:16:46,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:16:46,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-12-13 17:16:46,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:46,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:46,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:46,834 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 258 flow. Second operand 3 states and 641 transitions. [2022-12-13 17:16:46,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 706 flow [2022-12-13 17:16:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 699 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 17:16:47,170 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 332 flow [2022-12-13 17:16:47,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2022-12-13 17:16:47,171 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 11 predicate places. [2022-12-13 17:16:47,171 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 332 flow [2022-12-13 17:16:47,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:47,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:16:47,171 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 17:16:47,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:16:47,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 17:16:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:16:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash 400484914, now seen corresponding path program 1 times [2022-12-13 17:16:47,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:16:47,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603906600] [2022-12-13 17:16:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:16:47,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:16:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:16:47,230 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 17:16:47,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:16:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603906600] [2022-12-13 17:16:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603906600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:16:47,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:16:47,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:16:47,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507404916] [2022-12-13 17:16:47,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:16:47,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:16:47,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:16:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:16:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:16:47,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 388 [2022-12-13 17:16:47,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:16:47,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:16:47,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 388 [2022-12-13 17:16:47,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:17:33,911 INFO L130 PetriNetUnfolder]: 473965/652319 cut-off events. [2022-12-13 17:17:33,911 INFO L131 PetriNetUnfolder]: For 359461/360859 co-relation queries the response was YES. [2022-12-13 17:17:35,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557980 conditions, 652319 events. 473965/652319 cut-off events. For 359461/360859 co-relation queries the response was YES. Maximal size of possible extension queue 13246. Compared 5254961 event pairs, 302111 based on Foata normal form. 14592/643847 useless extension candidates. Maximal degree in co-relation 498230. Up to 438583 conditions per place. [2022-12-13 17:17:37,920 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 144 selfloop transitions, 7 changer transitions 0/168 dead transitions. [2022-12-13 17:17:37,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 168 transitions, 894 flow [2022-12-13 17:17:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:17:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:17:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 841 transitions. [2022-12-13 17:17:37,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.541881443298969 [2022-12-13 17:17:37,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 841 transitions. [2022-12-13 17:17:37,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 841 transitions. [2022-12-13 17:17:37,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:17:37,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 841 transitions. [2022-12-13 17:17:37,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:37,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:37,927 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:37,927 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 332 flow. Second operand 4 states and 841 transitions. [2022-12-13 17:17:37,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 168 transitions, 894 flow [2022-12-13 17:17:43,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 846 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:17:43,853 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 335 flow [2022-12-13 17:17:43,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=335, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2022-12-13 17:17:43,853 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2022-12-13 17:17:43,853 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 335 flow [2022-12-13 17:17:43,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:43,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:17:43,854 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:17:43,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 17:17:43,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 17:17:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:17:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -907276633, now seen corresponding path program 1 times [2022-12-13 17:17:43,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:17:43,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799129779] [2022-12-13 17:17:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:43,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:17:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:43,913 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 17:17:43,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:17:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799129779] [2022-12-13 17:17:43,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799129779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:17:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636326027] [2022-12-13 17:17:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:43,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:17:43,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:17:43,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:17:43,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:17:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:17:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:17:44,000 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 17:17:44,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:17:44,034 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 17:17:44,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636326027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:17:44,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:17:44,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 17:17:44,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384577867] [2022-12-13 17:17:44,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:17:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:17:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:17:44,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:17:44,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:17:44,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 388 [2022-12-13 17:17:44,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 335 flow. Second operand has 9 states, 9 states have (on average 184.11111111111111) internal successors, (1657), 9 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:44,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:17:44,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 388 [2022-12-13 17:17:44,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:17:52,854 INFO L130 PetriNetUnfolder]: 93661/131600 cut-off events. [2022-12-13 17:17:52,854 INFO L131 PetriNetUnfolder]: For 119814/119814 co-relation queries the response was YES. [2022-12-13 17:17:53,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366644 conditions, 131600 events. 93661/131600 cut-off events. For 119814/119814 co-relation queries the response was YES. Maximal size of possible extension queue 3498. Compared 980306 event pairs, 1630 based on Foata normal form. 7335/136912 useless extension candidates. Maximal degree in co-relation 366630. Up to 90522 conditions per place. [2022-12-13 17:17:53,681 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 132 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2022-12-13 17:17:53,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 152 transitions, 736 flow [2022-12-13 17:17:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:17:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:17:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1397 transitions. [2022-12-13 17:17:53,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5143593519882179 [2022-12-13 17:17:53,685 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1397 transitions. [2022-12-13 17:17:53,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1397 transitions. [2022-12-13 17:17:53,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:17:53,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1397 transitions. [2022-12-13 17:17:53,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:53,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:53,691 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:53,691 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 335 flow. Second operand 7 states and 1397 transitions. [2022-12-13 17:17:53,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 152 transitions, 736 flow [2022-12-13 17:17:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 152 transitions, 719 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 17:17:53,767 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 215 flow [2022-12-13 17:17:53,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=77, 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=83, PETRI_TRANSITIONS=62} [2022-12-13 17:17:53,767 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2022-12-13 17:17:53,767 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 215 flow [2022-12-13 17:17:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.11111111111111) internal successors, (1657), 9 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:53,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:17:53,768 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:17:53,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:17:53,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:17:53,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 17:17:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:17:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash 114661531, now seen corresponding path program 1 times [2022-12-13 17:17:53,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:17:53,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881024961] [2022-12-13 17:17:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:17:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:54,107 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 17:17:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:17:54,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881024961] [2022-12-13 17:17:54,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881024961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:17:54,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709159586] [2022-12-13 17:17:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:17:54,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:17:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:17:54,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:17:54,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:17:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:17:54,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:17:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:17:54,185 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 17:17:54,282 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 17:17:54,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:17:54,396 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 17:17:54,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709159586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:17:54,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:17:54,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 17:17:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311002234] [2022-12-13 17:17:54,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:17:54,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:17:54,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:17:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:17:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:17:54,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 388 [2022-12-13 17:17:54,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 62 transitions, 215 flow. Second operand has 17 states, 17 states have (on average 179.47058823529412) internal successors, (3051), 17 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:17:54,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:17:54,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 388 [2022-12-13 17:17:54,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:18:01,349 INFO L130 PetriNetUnfolder]: 68743/100140 cut-off events. [2022-12-13 17:18:01,349 INFO L131 PetriNetUnfolder]: For 82914/82920 co-relation queries the response was YES. [2022-12-13 17:18:01,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252457 conditions, 100140 events. 68743/100140 cut-off events. For 82914/82920 co-relation queries the response was YES. Maximal size of possible extension queue 2704. Compared 764644 event pairs, 1279 based on Foata normal form. 6534/105713 useless extension candidates. Maximal degree in co-relation 252443. Up to 59346 conditions per place. [2022-12-13 17:18:02,099 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 131 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2022-12-13 17:18:02,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 717 flow [2022-12-13 17:18:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:18:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:18:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1363 transitions. [2022-12-13 17:18:02,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.501840942562592 [2022-12-13 17:18:02,102 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1363 transitions. [2022-12-13 17:18:02,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1363 transitions. [2022-12-13 17:18:02,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:18:02,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1363 transitions. [2022-12-13 17:18:02,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.71428571428572) internal successors, (1363), 7 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:18:02,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:18:02,107 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:18:02,107 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 215 flow. Second operand 7 states and 1363 transitions. [2022-12-13 17:18:02,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 717 flow [2022-12-13 17:18:02,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 151 transitions, 698 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 17:18:02,129 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 196 flow [2022-12-13 17:18:02,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=79, PETRI_TRANSITIONS=61} [2022-12-13 17:18:02,130 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2022-12-13 17:18:02,130 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 196 flow [2022-12-13 17:18:02,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 179.47058823529412) internal successors, (3051), 17 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:18:02,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:18:02,130 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:18:02,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 17:18:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf90dbd-17d3-4ab3-9547-9eedfb67e500/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:18:02,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 17:18:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:18:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -740458341, now seen corresponding path program 1 times [2022-12-13 17:18:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:18:02,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364831780] [2022-12-13 17:18:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:18:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:18:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:18:02,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:18:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:18:02,374 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:18:02,374 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:18:02,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 17:18:02,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 17:18:02,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 17:18:02,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 17:18:02,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 17:18:02,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 17:18:02,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 17:18:02,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 17:18:02,375 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:18:02,375 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:18:02,375 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 17:18:02,395 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 17:18:02,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 254 transitions, 568 flow [2022-12-13 17:18:02,512 INFO L130 PetriNetUnfolder]: 158/1119 cut-off events. [2022-12-13 17:18:02,512 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:18:02,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1119 events. 158/1119 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5561 event pairs, 23 based on Foata normal form. 0/863 useless extension candidates. Maximal degree in co-relation 741. Up to 80 conditions per place. [2022-12-13 17:18:02,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 254 transitions, 568 flow [2022-12-13 17:18:02,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 254 transitions, 568 flow [2022-12-13 17:18:02,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:18:02,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 254 transitions, 568 flow [2022-12-13 17:18:02,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 254 transitions, 568 flow [2022-12-13 17:18:02,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 254 transitions, 568 flow [2022-12-13 17:18:02,628 INFO L130 PetriNetUnfolder]: 158/1119 cut-off events. [2022-12-13 17:18:02,629 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:18:02,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1119 events. 158/1119 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5561 event pairs, 23 based on Foata normal form. 0/863 useless extension candidates. Maximal degree in co-relation 741. Up to 80 conditions per place. [2022-12-13 17:18:02,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 34720 [2022-12-13 17:18:05,513 INFO L134 LiptonReduction]: Checked pairs total: 94988 [2022-12-13 17:18:05,513 INFO L136 LiptonReduction]: Total number of compositions: 177 [2022-12-13 17:18:05,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:18:05,514 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;@349a3a48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:18:05,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:18:05,515 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 17:18:05,515 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:18:05,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:18:05,515 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:18:05,515 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 17:18:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:18:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash 67023, now seen corresponding path program 1 times [2022-12-13 17:18:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:18:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019142370] [2022-12-13 17:18:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:18:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:18:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:18:05,550 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 17:18:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:18:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019142370] [2022-12-13 17:18:05,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019142370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:18:05,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:18:05,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:18:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499073439] [2022-12-13 17:18:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:18:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:18:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:18:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:18:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:18:05,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 431 [2022-12-13 17:18:05,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:18:05,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:18:05,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 431 [2022-12-13 17:18:05,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand