./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-simpl-str-symm.wvr.c --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_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/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_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-simpl-str-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/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_ea797772-9901-4b15-a265-8a6d670f1675/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 cfa53b3a6eade068c4346d28766037c8d26fae61c62dd4c8f6fc2f9d68567d2c --- 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 11:56:22,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:56:22,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:56:22,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:56:22,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:56:22,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:56:22,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:56:22,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:56:22,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:56:22,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:56:22,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:56:22,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:56:22,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:56:22,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:56:22,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:56:22,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:56:22,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:56:22,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:56:22,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:56:22,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:56:22,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:56:22,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:56:22,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:56:22,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:56:22,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:56:22,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:56:22,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:56:22,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:56:22,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:56:22,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:56:22,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:56:22,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:56:22,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:56:22,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:56:22,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:56:22,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:56:22,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:56:22,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:56:22,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:56:22,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:56:22,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:56:22,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:56:22,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:56:22,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:56:22,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:56:22,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:56:22,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:56:22,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:56:22,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:56:22,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:56:22,319 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:56:22,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:56:22,320 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:56:22,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:56:22,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:56:22,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:56:22,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:56:22,320 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:56:22,321 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:56:22,321 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:56:22,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:56:22,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:56:22,321 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:56:22,321 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:56:22,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:56:22,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:56:22,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:56:22,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:56:22,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:56:22,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:56:22,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:56:22,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:56:22,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:56:22,323 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:56:22,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:56:22,323 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:56:22,324 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_ea797772-9901-4b15-a265-8a6d670f1675/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfa53b3a6eade068c4346d28766037c8d26fae61c62dd4c8f6fc2f9d68567d2c [2022-12-13 11:56:22,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:56:22,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:56:22,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:56:22,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:56:22,538 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:56:22,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-simpl-str-symm.wvr.c [2022-12-13 11:56:25,154 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:56:25,283 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:56:25,283 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/sv-benchmarks/c/weaver/chl-simpl-str-symm.wvr.c [2022-12-13 11:56:25,288 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/data/323f84978/a814b7b2e70a4b939faa14a6475e25d0/FLAGac24481e6 [2022-12-13 11:56:25,298 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/data/323f84978/a814b7b2e70a4b939faa14a6475e25d0 [2022-12-13 11:56:25,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:56:25,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:56:25,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:56:25,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:56:25,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:56:25,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697c8fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25, skipping insertion in model container [2022-12-13 11:56:25,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:56:25,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:56:25,460 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_ea797772-9901-4b15-a265-8a6d670f1675/sv-benchmarks/c/weaver/chl-simpl-str-symm.wvr.c[2303,2316] [2022-12-13 11:56:25,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:56:25,472 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:56:25,485 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_ea797772-9901-4b15-a265-8a6d670f1675/sv-benchmarks/c/weaver/chl-simpl-str-symm.wvr.c[2303,2316] [2022-12-13 11:56:25,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:56:25,497 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:56:25,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25 WrapperNode [2022-12-13 11:56:25,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:56:25,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:56:25,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:56:25,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:56:25,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,525 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 122 [2022-12-13 11:56:25,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:56:25,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:56:25,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:56:25,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:56:25,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:56:25,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:56:25,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:56:25,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:56:25,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (1/1) ... [2022-12-13 11:56:25,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:56:25,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:25,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:56:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:56:25,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:56:25,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:56:25,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:56:25,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:56:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:56:25,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:56:25,611 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 11:56:25,699 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:56:25,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:56:25,952 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:56:25,961 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:56:25,961 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 11:56:25,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:56:25 BoogieIcfgContainer [2022-12-13 11:56:25,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:56:25,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:56:25,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:56:25,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:56:25,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:56:25" (1/3) ... [2022-12-13 11:56:25,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148323c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:56:25, skipping insertion in model container [2022-12-13 11:56:25,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:25" (2/3) ... [2022-12-13 11:56:25,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148323c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:56:25, skipping insertion in model container [2022-12-13 11:56:25,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:56:25" (3/3) ... [2022-12-13 11:56:25,973 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-simpl-str-symm.wvr.c [2022-12-13 11:56:25,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:56:25,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 11:56:25,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:56:26,067 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:56:26,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 178 transitions, 372 flow [2022-12-13 11:56:26,166 INFO L130 PetriNetUnfolder]: 11/176 cut-off events. [2022-12-13 11:56:26,166 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:56:26,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 11/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 282 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-12-13 11:56:26,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 178 transitions, 372 flow [2022-12-13 11:56:26,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 171 transitions, 354 flow [2022-12-13 11:56:26,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:56:26,193 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 171 transitions, 354 flow [2022-12-13 11:56:26,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 171 transitions, 354 flow [2022-12-13 11:56:26,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 171 transitions, 354 flow [2022-12-13 11:56:26,227 INFO L130 PetriNetUnfolder]: 11/171 cut-off events. [2022-12-13 11:56:26,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:56:26,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 171 events. 11/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 281 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-12-13 11:56:26,232 INFO L119 LiptonReduction]: Number of co-enabled transitions 5040 [2022-12-13 11:56:30,271 INFO L134 LiptonReduction]: Checked pairs total: 4796 [2022-12-13 11:56:30,271 INFO L136 LiptonReduction]: Total number of compositions: 210 [2022-12-13 11:56:30,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:56:30,286 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;@44e6ae0a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:56:30,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 11:56:30,287 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 11:56:30,287 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:30,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:30,288 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 11:56:30,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash 722, now seen corresponding path program 1 times [2022-12-13 11:56:30,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:30,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277845717] [2022-12-13 11:56:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:30,381 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 11:56:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:30,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277845717] [2022-12-13 11:56:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277845717] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:30,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:30,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 11:56:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866050108] [2022-12-13 11:56:30,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:30,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:56:30,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:56:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:56:30,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 388 [2022-12-13 11:56:30,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 2 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:30,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 388 [2022-12-13 11:56:30,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:30,451 INFO L130 PetriNetUnfolder]: 21/56 cut-off events. [2022-12-13 11:56:30,451 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 11:56:30,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 56 events. 21/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 122 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 84. Up to 57 conditions per place. [2022-12-13 11:56:30,453 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 17 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-12-13 11:56:30,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 80 flow [2022-12-13 11:56:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:56:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 11:56:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2022-12-13 11:56:30,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4536082474226804 [2022-12-13 11:56:30,466 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2022-12-13 11:56:30,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2022-12-13 11:56:30,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:30,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2022-12-13 11:56:30,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.0) internal successors, (352), 2 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,484 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,485 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 2 states and 352 transitions. [2022-12-13 11:56:30,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 80 flow [2022-12-13 11:56:30,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:56:30,489 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 38 flow [2022-12-13 11:56:30,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2022-12-13 11:56:30,494 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-12-13 11:56:30,494 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 38 flow [2022-12-13 11:56:30,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:30,495 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:56:30,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:56:30,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:30,496 INFO L85 PathProgramCache]: Analyzing trace with hash 711384, now seen corresponding path program 1 times [2022-12-13 11:56:30,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:30,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949391545] [2022-12-13 11:56:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:30,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:30,584 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 11:56:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:30,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949391545] [2022-12-13 11:56:30,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949391545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:30,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:30,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:30,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722832553] [2022-12-13 11:56:30,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:30,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 388 [2022-12-13 11:56:30,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:30,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 388 [2022-12-13 11:56:30,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:30,650 INFO L130 PetriNetUnfolder]: 19/50 cut-off events. [2022-12-13 11:56:30,650 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:30,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 50 events. 19/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 104 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 103. Up to 50 conditions per place. [2022-12-13 11:56:30,650 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 11:56:30,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 64 flow [2022-12-13 11:56:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-12-13 11:56:30,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41924398625429554 [2022-12-13 11:56:30,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-12-13 11:56:30,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-12-13 11:56:30,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:30,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-12-13 11:56:30,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,658 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 11:56:30,659 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 11:56:30,659 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 38 flow. Second operand 3 states and 488 transitions. [2022-12-13 11:56:30,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 64 flow [2022-12-13 11:56:30,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:56:30,660 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 36 flow [2022-12-13 11:56:30,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2022-12-13 11:56:30,661 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-12-13 11:56:30,661 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 36 flow [2022-12-13 11:56:30,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:30,662 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:56:30,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:56:30,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash 711382, now seen corresponding path program 1 times [2022-12-13 11:56:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:30,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984626873] [2022-12-13 11:56:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:30,761 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 11:56:30,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:30,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984626873] [2022-12-13 11:56:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984626873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:30,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:30,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:30,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458109172] [2022-12-13 11:56:30,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:30,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:30,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:30,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 388 [2022-12-13 11:56:30,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:30,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 388 [2022-12-13 11:56:30,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:30,821 INFO L130 PetriNetUnfolder]: 17/44 cut-off events. [2022-12-13 11:56:30,821 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:30,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 44 events. 17/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 90 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 92. Up to 44 conditions per place. [2022-12-13 11:56:30,821 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2022-12-13 11:56:30,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 58 flow [2022-12-13 11:56:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-12-13 11:56:30,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42783505154639173 [2022-12-13 11:56:30,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-12-13 11:56:30,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-12-13 11:56:30,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:30,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-12-13 11:56:30,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,826 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 11:56:30,826 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 11:56:30,826 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 36 flow. Second operand 3 states and 498 transitions. [2022-12-13 11:56:30,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 58 flow [2022-12-13 11:56:30,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:30,827 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 33 flow [2022-12-13 11:56:30,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2022-12-13 11:56:30,827 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-12-13 11:56:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 33 flow [2022-12-13 11:56:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:30,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:30,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:56:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:56:30,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 683654549, now seen corresponding path program 1 times [2022-12-13 11:56:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514634893] [2022-12-13 11:56:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:30,961 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 11:56:30,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514634893] [2022-12-13 11:56:30,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514634893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:30,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:30,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:56:30,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323231734] [2022-12-13 11:56:30,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:30,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:56:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:56:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:56:31,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 388 [2022-12-13 11:56:31,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 33 flow. Second operand has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:31,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 388 [2022-12-13 11:56:31,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:31,028 INFO L130 PetriNetUnfolder]: 13/36 cut-off events. [2022-12-13 11:56:31,029 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 36 events. 13/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 77. Up to 36 conditions per place. [2022-12-13 11:56:31,029 INFO L137 encePairwiseOnDemand]: 386/388 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2022-12-13 11:56:31,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 55 flow [2022-12-13 11:56:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-12-13 11:56:31,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4209621993127148 [2022-12-13 11:56:31,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-12-13 11:56:31,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-12-13 11:56:31,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:31,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-12-13 11:56:31,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,036 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 11:56:31,036 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 11:56:31,036 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 33 flow. Second operand 3 states and 490 transitions. [2022-12-13 11:56:31,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 55 flow [2022-12-13 11:56:31,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:31,037 INFO L231 Difference]: Finished difference. Result has 20 places, 12 transitions, 32 flow [2022-12-13 11:56:31,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=20, PETRI_TRANSITIONS=12} [2022-12-13 11:56:31,038 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-12-13 11:56:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 32 flow [2022-12-13 11:56:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:31,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:56:31,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:56:31,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 683654548, now seen corresponding path program 1 times [2022-12-13 11:56:31,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:31,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139667234] [2022-12-13 11:56:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:31,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:31,100 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 11:56:31,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:31,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139667234] [2022-12-13 11:56:31,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139667234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:31,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:31,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:56:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186916406] [2022-12-13 11:56:31,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:31,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:56:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:56:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:56:31,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 388 [2022-12-13 11:56:31,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:31,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 388 [2022-12-13 11:56:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:31,173 INFO L130 PetriNetUnfolder]: 9/28 cut-off events. [2022-12-13 11:56:31,173 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:31,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 28 events. 9/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 62. Up to 28 conditions per place. [2022-12-13 11:56:31,173 INFO L137 encePairwiseOnDemand]: 386/388 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2022-12-13 11:56:31,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 11 transitions, 52 flow [2022-12-13 11:56:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2022-12-13 11:56:31,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40463917525773196 [2022-12-13 11:56:31,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2022-12-13 11:56:31,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2022-12-13 11:56:31,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:31,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2022-12-13 11:56:31,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,180 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 11:56:31,181 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 11:56:31,181 INFO L175 Difference]: Start difference. First operand has 20 places, 12 transitions, 32 flow. Second operand 3 states and 471 transitions. [2022-12-13 11:56:31,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 11 transitions, 52 flow [2022-12-13 11:56:31,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 51 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:31,181 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 31 flow [2022-12-13 11:56:31,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2022-12-13 11:56:31,182 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-12-13 11:56:31,182 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 31 flow [2022-12-13 11:56:31,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:31,183 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:31,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:56:31,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1268915137, now seen corresponding path program 1 times [2022-12-13 11:56:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515588179] [2022-12-13 11:56:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:31,715 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 11:56:31,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515588179] [2022-12-13 11:56:31,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515588179] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:31,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:31,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:56:31,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452533672] [2022-12-13 11:56:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:31,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:56:31,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:56:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:56:31,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 388 [2022-12-13 11:56:31,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:31,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 388 [2022-12-13 11:56:31,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:31,852 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2022-12-13 11:56:31,852 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:56:31,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 32 events. 8/32 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 71. Up to 16 conditions per place. [2022-12-13 11:56:31,852 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 10 selfloop transitions, 3 changer transitions 8/21 dead transitions. [2022-12-13 11:56:31,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 96 flow [2022-12-13 11:56:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:56:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:56:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2022-12-13 11:56:31,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40824742268041236 [2022-12-13 11:56:31,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2022-12-13 11:56:31,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2022-12-13 11:56:31,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:31,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2022-12-13 11:56:31,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,858 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 31 flow. Second operand 5 states and 792 transitions. [2022-12-13 11:56:31,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 96 flow [2022-12-13 11:56:31,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:31,859 INFO L231 Difference]: Finished difference. Result has 24 places, 11 transitions, 38 flow [2022-12-13 11:56:31,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=38, PETRI_PLACES=24, PETRI_TRANSITIONS=11} [2022-12-13 11:56:31,859 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2022-12-13 11:56:31,860 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 11 transitions, 38 flow [2022-12-13 11:56:31,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:31,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:31,860 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:56:31,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2128287789, now seen corresponding path program 2 times [2022-12-13 11:56:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:31,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917725341] [2022-12-13 11:56:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:32,342 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 11:56:32,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917725341] [2022-12-13 11:56:32,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917725341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:32,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:32,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:56:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764300566] [2022-12-13 11:56:32,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:56:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:56:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:56:32,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 388 [2022-12-13 11:56:32,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 11 transitions, 38 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:32,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:32,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 388 [2022-12-13 11:56:32,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:32,490 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 11:56:32,490 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:56:32,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 14 events. 2/14 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 39. Up to 6 conditions per place. [2022-12-13 11:56:32,490 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2022-12-13 11:56:32,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 12 transitions, 62 flow [2022-12-13 11:56:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:56:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:56:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 783 transitions. [2022-12-13 11:56:32,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036082474226804 [2022-12-13 11:56:32,493 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 783 transitions. [2022-12-13 11:56:32,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 783 transitions. [2022-12-13 11:56:32,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:32,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 783 transitions. [2022-12-13 11:56:32,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:32,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:32,498 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:32,498 INFO L175 Difference]: Start difference. First operand has 24 places, 11 transitions, 38 flow. Second operand 5 states and 783 transitions. [2022-12-13 11:56:32,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 12 transitions, 62 flow [2022-12-13 11:56:32,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 12 transitions, 58 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:56:32,499 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2022-12-13 11:56:32,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2022-12-13 11:56:32,499 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2022-12-13 11:56:32,500 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2022-12-13 11:56:32,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:32,503 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2022-12-13 11:56:32,503 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2022-12-13 11:56:32,503 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2022-12-13 11:56:32,503 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2022-12-13 11:56:32,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2022-12-13 11:56:32,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2022-12-13 11:56:32,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2022-12-13 11:56:32,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2022-12-13 11:56:32,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2022-12-13 11:56:32,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2022-12-13 11:56:32,505 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2022-12-13 11:56:32,505 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2022-12-13 11:56:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:56:32,505 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-12-13 11:56:32,508 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 11:56:32,508 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 11:56:32,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 11:56:32 BasicIcfg [2022-12-13 11:56:32,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 11:56:32,513 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 11:56:32,513 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 11:56:32,513 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 11:56:32,513 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:56:25" (3/4) ... [2022-12-13 11:56:32,515 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 11:56:32,520 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-12-13 11:56:32,520 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-12-13 11:56:32,523 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2022-12-13 11:56:32,523 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 11:56:32,523 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 11:56:32,523 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 11:56:32,547 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 11:56:32,547 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 11:56:32,547 INFO L158 Benchmark]: Toolchain (without parser) took 7246.93ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 112.0MB in the beginning and 95.9MB in the end (delta: 16.1MB). Peak memory consumption was 54.9MB. Max. memory is 16.1GB. [2022-12-13 11:56:32,547 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 68.7MB in the beginning and 68.7MB in the end (delta: 91.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:56:32,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.80ms. Allocated memory is still 172.0MB. Free memory was 111.8MB in the beginning and 144.3MB in the end (delta: -32.5MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2022-12-13 11:56:32,548 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.96ms. Allocated memory is still 172.0MB. Free memory was 144.3MB in the beginning and 142.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 11:56:32,548 INFO L158 Benchmark]: Boogie Preprocessor took 23.02ms. Allocated memory is still 172.0MB. Free memory was 142.2MB in the beginning and 141.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:56:32,548 INFO L158 Benchmark]: RCFGBuilder took 414.58ms. Allocated memory is still 172.0MB. Free memory was 141.0MB in the beginning and 124.5MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 11:56:32,548 INFO L158 Benchmark]: TraceAbstraction took 6545.79ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 123.8MB in the beginning and 99.0MB in the end (delta: 24.8MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. [2022-12-13 11:56:32,549 INFO L158 Benchmark]: Witness Printer took 34.05ms. Allocated memory is still 207.6MB. Free memory was 99.0MB in the beginning and 95.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 11:56:32,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 68.7MB in the beginning and 68.7MB in the end (delta: 91.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.80ms. Allocated memory is still 172.0MB. Free memory was 111.8MB in the beginning and 144.3MB in the end (delta: -32.5MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.96ms. Allocated memory is still 172.0MB. Free memory was 144.3MB in the beginning and 142.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.02ms. Allocated memory is still 172.0MB. Free memory was 142.2MB in the beginning and 141.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 414.58ms. Allocated memory is still 172.0MB. Free memory was 141.0MB in the beginning and 124.5MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 6545.79ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 123.8MB in the beginning and 99.0MB in the end (delta: 24.8MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. * Witness Printer took 34.05ms. Allocated memory is still 207.6MB. Free memory was 99.0MB in the beginning and 95.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 167 PlacesBefore, 27 PlacesAfterwards, 171 TransitionsBefore, 20 TransitionsAfterwards, 5040 CoEnabledTransitionPairs, 6 FixpointIterations, 77 TrivialSequentialCompositions, 87 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 30 ConcurrentYvCompositions, 11 ChoiceCompositions, 210 TotalNumberOfCompositions, 4796 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4796, independent: 4796, independent conditional: 0, independent unconditional: 4796, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3008, independent: 3008, independent conditional: 0, independent unconditional: 3008, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4796, independent: 1788, independent conditional: 0, independent unconditional: 1788, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3008, unknown conditional: 0, unknown unconditional: 3008] , Statistics on independence cache: Total cache size (in pairs): 15, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 72]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 54]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 244 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.4s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 449 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 234 mSDsluCounter, 35 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 424 IncrementalHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 30 mSDtfsCounter, 424 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 11:56:32,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea797772-9901-4b15-a265-8a6d670f1675/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE