./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-match-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-match-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R --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 016929a4a7ae1865ccc9d17762b9a3f4b350d2f1f075a0491feba933e4e45fac --- 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-38b53e6 [2022-11-25 18:11:23,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:11:23,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:11:23,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:11:23,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:11:23,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:11:23,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:11:23,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:11:23,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:11:23,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:11:23,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:11:23,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:11:23,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:11:23,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:11:23,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:11:23,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:11:23,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:11:23,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:11:23,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:11:23,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:11:23,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:11:23,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:11:23,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:11:23,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:11:23,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:11:23,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:11:23,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:11:23,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:11:23,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:11:23,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:11:23,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:11:23,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:11:23,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:11:23,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:11:23,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:11:23,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:11:23,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:11:23,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:11:23,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:11:23,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:11:23,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:11:23,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:11:23,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:11:23,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:11:23,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:11:23,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:11:23,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:11:23,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:11:23,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:11:23,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:11:23,478 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:11:23,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:11:23,479 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:11:23,479 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:11:23,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:11:23,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:11:23,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:11:23,480 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:11:23,480 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:11:23,480 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:11:23,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:11:23,481 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:11:23,481 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:11:23,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:11:23,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:11:23,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:11:23,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:11:23,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:11:23,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:11:23,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:11:23,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:11:23,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:11:23,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:11:23,484 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:11:23,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:11:23,484 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_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016929a4a7ae1865ccc9d17762b9a3f4b350d2f1f075a0491feba933e4e45fac [2022-11-25 18:11:23,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:11:23,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:11:23,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:11:23,761 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:11:23,761 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:11:23,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-match-symm.wvr.c [2022-11-25 18:11:26,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:11:27,076 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:11:27,077 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/sv-benchmarks/c/weaver/chl-match-symm.wvr.c [2022-11-25 18:11:27,085 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/data/b8b1d89bb/b7213b698fcb460bba5b667c64bf5f33/FLAG5e40f090d [2022-11-25 18:11:27,106 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/data/b8b1d89bb/b7213b698fcb460bba5b667c64bf5f33 [2022-11-25 18:11:27,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:11:27,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:11:27,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:11:27,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:11:27,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:11:27,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7bffc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27, skipping insertion in model container [2022-11-25 18:11:27,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:11:27,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:11:27,421 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_e54c5738-90b3-42c4-91d6-47238955ebe8/sv-benchmarks/c/weaver/chl-match-symm.wvr.c[2584,2597] [2022-11-25 18:11:27,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:11:27,451 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:11:27,498 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_e54c5738-90b3-42c4-91d6-47238955ebe8/sv-benchmarks/c/weaver/chl-match-symm.wvr.c[2584,2597] [2022-11-25 18:11:27,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:11:27,521 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:11:27,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27 WrapperNode [2022-11-25 18:11:27,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:11:27,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:11:27,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:11:27,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:11:27,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,585 INFO L138 Inliner]: procedures = 22, calls = 27, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 148 [2022-11-25 18:11:27,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:11:27,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:11:27,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:11:27,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:11:27,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:11:27,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:11:27,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:11:27,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:11:27,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (1/1) ... [2022-11-25 18:11:27,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:11:27,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:27,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:11:27,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:11:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:11:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:11:27,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:11:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:11:27,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:11:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:11:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:11:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:11:27,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:11:27,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:11:27,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:11:27,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:11:27,723 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:11:27,859 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:11:27,861 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:11:28,271 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:11:28,281 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:11:28,281 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 18:11:28,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:28 BoogieIcfgContainer [2022-11-25 18:11:28,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:11:28,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:11:28,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:11:28,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:11:28,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:11:27" (1/3) ... [2022-11-25 18:11:28,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c49fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:28, skipping insertion in model container [2022-11-25 18:11:28,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:27" (2/3) ... [2022-11-25 18:11:28,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c49fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:28, skipping insertion in model container [2022-11-25 18:11:28,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:28" (3/3) ... [2022-11-25 18:11:28,293 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-match-symm.wvr.c [2022-11-25 18:11:28,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:11:28,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 18:11:28,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:11:28,429 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:11:28,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 224 transitions, 464 flow [2022-11-25 18:11:28,568 INFO L130 PetriNetUnfolder]: 11/222 cut-off events. [2022-11-25 18:11:28,574 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:11:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 222 events. 11/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2022-11-25 18:11:28,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 224 transitions, 464 flow [2022-11-25 18:11:28,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 217 transitions, 446 flow [2022-11-25 18:11:28,597 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:11:28,624 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 217 transitions, 446 flow [2022-11-25 18:11:28,631 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 217 transitions, 446 flow [2022-11-25 18:11:28,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 217 transitions, 446 flow [2022-11-25 18:11:28,739 INFO L130 PetriNetUnfolder]: 11/217 cut-off events. [2022-11-25 18:11:28,739 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:11:28,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 217 events. 11/217 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2022-11-25 18:11:28,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 9676 [2022-11-25 18:11:37,259 INFO L134 LiptonReduction]: Checked pairs total: 8506 [2022-11-25 18:11:37,260 INFO L136 LiptonReduction]: Total number of compositions: 257 [2022-11-25 18:11:37,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:11:37,283 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;@45f0efc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:11:37,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 18:11:37,285 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:11:37,286 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:11:37,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:37,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:11:37,287 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)] === [2022-11-25 18:11:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash 899, now seen corresponding path program 1 times [2022-11-25 18:11:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:37,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821657921] [2022-11-25 18:11:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:37,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821657921] [2022-11-25 18:11:37,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821657921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:37,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:11:37,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452337801] [2022-11-25 18:11:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:11:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:11:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:11:37,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 481 [2022-11-25 18:11:37,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 2 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:37,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 481 [2022-11-25 18:11:37,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:37,493 INFO L130 PetriNetUnfolder]: 21/56 cut-off events. [2022-11-25 18:11:37,493 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 18:11:37,494 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 124 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. [2022-11-25 18:11:37,495 INFO L137 encePairwiseOnDemand]: 478/481 looper letters, 17 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-11-25 18:11:37,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 80 flow [2022-11-25 18:11:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:11:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:11:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 436 transitions. [2022-11-25 18:11:37,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45322245322245325 [2022-11-25 18:11:37,512 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 436 transitions. [2022-11-25 18:11:37,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 436 transitions. [2022-11-25 18:11:37,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:37,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 436 transitions. [2022-11-25 18:11:37,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 481.0) internal successors, (1443), 3 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,529 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 481.0) internal successors, (1443), 3 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,531 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 2 states and 436 transitions. [2022-11-25 18:11:37,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 80 flow [2022-11-25 18:11:37,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:11:37,536 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 38 flow [2022-11-25 18:11:37,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:37,542 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-11-25 18:11:37,543 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 38 flow [2022-11-25 18:11:37,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:37,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:11:37,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:11:37,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:11:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 882834, now seen corresponding path program 1 times [2022-11-25 18:11:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981073547] [2022-11-25 18:11:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:37,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981073547] [2022-11-25 18:11:37,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981073547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:37,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:37,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247757605] [2022-11-25 18:11:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:37,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:37,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 481 [2022-11-25 18:11:37,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:37,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 481 [2022-11-25 18:11:37,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:37,844 INFO L130 PetriNetUnfolder]: 19/50 cut-off events. [2022-11-25 18:11:37,845 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:11:37,845 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 106 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. [2022-11-25 18:11:37,846 INFO L137 encePairwiseOnDemand]: 478/481 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-11-25 18:11:37,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 64 flow [2022-11-25 18:11:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2022-11-25 18:11:37,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338184338184338 [2022-11-25 18:11:37,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2022-11-25 18:11:37,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2022-11-25 18:11:37,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:37,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2022-11-25 18:11:37,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,858 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 38 flow. Second operand 3 states and 626 transitions. [2022-11-25 18:11:37,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 64 flow [2022-11-25 18:11:37,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:11:37,859 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 36 flow [2022-11-25 18:11:37,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:37,860 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-11-25 18:11:37,860 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 36 flow [2022-11-25 18:11:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:37,861 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:11:37,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:11:37,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:11:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 882835, now seen corresponding path program 1 times [2022-11-25 18:11:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171474961] [2022-11-25 18:11:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:37,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171474961] [2022-11-25 18:11:37,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171474961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:37,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:37,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131239336] [2022-11-25 18:11:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:37,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:37,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 481 [2022-11-25 18:11:37,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:37,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 481 [2022-11-25 18:11:37,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:37,995 INFO L130 PetriNetUnfolder]: 17/44 cut-off events. [2022-11-25 18:11:37,996 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:11:37,996 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 89 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. [2022-11-25 18:11:37,996 INFO L137 encePairwiseOnDemand]: 478/481 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2022-11-25 18:11:37,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 58 flow [2022-11-25 18:11:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2022-11-25 18:11:37,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42411642411642414 [2022-11-25 18:11:37,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2022-11-25 18:11:37,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2022-11-25 18:11:38,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:38,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2022-11-25 18:11:38,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,005 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 36 flow. Second operand 3 states and 612 transitions. [2022-11-25 18:11:38,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 58 flow [2022-11-25 18:11:38,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:38,006 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 33 flow [2022-11-25 18:11:38,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:38,007 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-11-25 18:11:38,008 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 33 flow [2022-11-25 18:11:38,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:38,009 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:11:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:11:38,009 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)] === [2022-11-25 18:11:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash 848425176, now seen corresponding path program 1 times [2022-11-25 18:11:38,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:38,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042132276] [2022-11-25 18:11:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:38,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:38,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042132276] [2022-11-25 18:11:38,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042132276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:38,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:38,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:11:38,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371655491] [2022-11-25 18:11:38,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:38,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:11:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:11:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:11:38,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 481 [2022-11-25 18:11:38,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 33 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:38,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 481 [2022-11-25 18:11:38,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:38,304 INFO L130 PetriNetUnfolder]: 13/36 cut-off events. [2022-11-25 18:11:38,304 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:11:38,306 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 58 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. [2022-11-25 18:11:38,306 INFO L137 encePairwiseOnDemand]: 479/481 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2022-11-25 18:11:38,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 55 flow [2022-11-25 18:11:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2022-11-25 18:11:38,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4268884268884269 [2022-11-25 18:11:38,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2022-11-25 18:11:38,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2022-11-25 18:11:38,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:38,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2022-11-25 18:11:38,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,323 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 33 flow. Second operand 3 states and 616 transitions. [2022-11-25 18:11:38,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 55 flow [2022-11-25 18:11:38,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:38,325 INFO L231 Difference]: Finished difference. Result has 20 places, 12 transitions, 32 flow [2022-11-25 18:11:38,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:38,327 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-11-25 18:11:38,327 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 32 flow [2022-11-25 18:11:38,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:38,328 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:11:38,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:11:38,329 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)] === [2022-11-25 18:11:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash 848425175, now seen corresponding path program 1 times [2022-11-25 18:11:38,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:38,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123133483] [2022-11-25 18:11:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:38,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123133483] [2022-11-25 18:11:38,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123133483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:38,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:38,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:11:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347893727] [2022-11-25 18:11:38,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:11:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:11:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:11:38,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 481 [2022-11-25 18:11:38,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:38,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 481 [2022-11-25 18:11:38,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:38,567 INFO L130 PetriNetUnfolder]: 9/28 cut-off events. [2022-11-25 18:11:38,567 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:11:38,568 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. [2022-11-25 18:11:38,569 INFO L137 encePairwiseOnDemand]: 479/481 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2022-11-25 18:11:38,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 11 transitions, 52 flow [2022-11-25 18:11:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2022-11-25 18:11:38,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41372141372141374 [2022-11-25 18:11:38,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2022-11-25 18:11:38,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2022-11-25 18:11:38,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:38,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2022-11-25 18:11:38,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,578 INFO L175 Difference]: Start difference. First operand has 20 places, 12 transitions, 32 flow. Second operand 3 states and 597 transitions. [2022-11-25 18:11:38,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 11 transitions, 52 flow [2022-11-25 18:11:38,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 51 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:38,580 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 31 flow [2022-11-25 18:11:38,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:38,582 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-11-25 18:11:38,582 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 31 flow [2022-11-25 18:11:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:38,583 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:38,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:11:38,583 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)] === [2022-11-25 18:11:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1189587965, now seen corresponding path program 1 times [2022-11-25 18:11:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925520427] [2022-11-25 18:11:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:38,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925520427] [2022-11-25 18:11:39,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925520427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:39,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:39,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:11:39,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706353505] [2022-11-25 18:11:39,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:39,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:11:39,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:11:39,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:11:39,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 481 [2022-11-25 18:11:39,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:39,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:39,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 481 [2022-11-25 18:11:39,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:39,553 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2022-11-25 18:11:39,553 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:11:39,553 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 56 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. [2022-11-25 18:11:39,554 INFO L137 encePairwiseOnDemand]: 477/481 looper letters, 10 selfloop transitions, 3 changer transitions 8/21 dead transitions. [2022-11-25 18:11:39,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 96 flow [2022-11-25 18:11:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:11:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:11:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 982 transitions. [2022-11-25 18:11:39,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40831600831600834 [2022-11-25 18:11:39,557 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 982 transitions. [2022-11-25 18:11:39,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 982 transitions. [2022-11-25 18:11:39,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:39,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 982 transitions. [2022-11-25 18:11:39,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:39,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:39,567 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:39,567 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 31 flow. Second operand 5 states and 982 transitions. [2022-11-25 18:11:39,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 96 flow [2022-11-25 18:11:39,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:39,569 INFO L231 Difference]: Finished difference. Result has 24 places, 11 transitions, 38 flow [2022-11-25 18:11:39,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:39,570 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2022-11-25 18:11:39,570 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 11 transitions, 38 flow [2022-11-25 18:11:39,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:39,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:39,571 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:39,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:11:39,572 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)] === [2022-11-25 18:11:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1336552109, now seen corresponding path program 2 times [2022-11-25 18:11:39,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:39,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294715535] [2022-11-25 18:11:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:40,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:40,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294715535] [2022-11-25 18:11:40,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294715535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:40,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:40,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:11:40,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635244197] [2022-11-25 18:11:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:40,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:11:40,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:11:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:11:40,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 481 [2022-11-25 18:11:40,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 11 transitions, 38 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:40,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:40,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 481 [2022-11-25 18:11:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:40,418 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-11-25 18:11:40,418 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:11:40,419 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. [2022-11-25 18:11:40,419 INFO L137 encePairwiseOnDemand]: 477/481 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2022-11-25 18:11:40,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 12 transitions, 62 flow [2022-11-25 18:11:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:11:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:11:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 973 transitions. [2022-11-25 18:11:40,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4045738045738046 [2022-11-25 18:11:40,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 973 transitions. [2022-11-25 18:11:40,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 973 transitions. [2022-11-25 18:11:40,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:40,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 973 transitions. [2022-11-25 18:11:40,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:40,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:40,430 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:40,430 INFO L175 Difference]: Start difference. First operand has 24 places, 11 transitions, 38 flow. Second operand 5 states and 973 transitions. [2022-11-25 18:11:40,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 12 transitions, 62 flow [2022-11-25 18:11:40,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 12 transitions, 58 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:40,456 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2022-11-25 18:11:40,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, 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} [2022-11-25 18:11:40,457 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2022-11-25 18:11:40,457 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2022-11-25 18:11:40,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:40,460 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2022-11-25 18:11:40,460 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2022-11-25 18:11:40,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2022-11-25 18:11:40,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2022-11-25 18:11:40,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2022-11-25 18:11:40,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2022-11-25 18:11:40,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2022-11-25 18:11:40,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2022-11-25 18:11:40,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2022-11-25 18:11:40,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2022-11-25 18:11:40,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2022-11-25 18:11:40,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2022-11-25 18:11:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:11:40,463 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-11-25 18:11:40,466 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:11:40,467 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:11:40,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:11:40 BasicIcfg [2022-11-25 18:11:40,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:11:40,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:11:40,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:11:40,471 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:11:40,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:28" (3/4) ... [2022-11-25 18:11:40,474 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 18:11:40,481 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-25 18:11:40,481 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-25 18:11:40,485 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2022-11-25 18:11:40,486 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 18:11:40,486 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 18:11:40,486 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 18:11:40,521 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 18:11:40,521 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:11:40,522 INFO L158 Benchmark]: Toolchain (without parser) took 13410.38ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 139.0MB in the beginning and 166.2MB in the end (delta: -27.2MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2022-11-25 18:11:40,522 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 134.2MB. Free memory is still 79.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:11:40,522 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.74ms. Allocated memory is still 172.0MB. Free memory was 139.0MB in the beginning and 127.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 18:11:40,522 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.90ms. Allocated memory is still 172.0MB. Free memory was 127.1MB in the beginning and 125.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:11:40,523 INFO L158 Benchmark]: Boogie Preprocessor took 51.37ms. Allocated memory is still 172.0MB. Free memory was 125.2MB in the beginning and 123.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:11:40,523 INFO L158 Benchmark]: RCFGBuilder took 646.05ms. Allocated memory is still 172.0MB. Free memory was 123.8MB in the beginning and 104.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-25 18:11:40,523 INFO L158 Benchmark]: TraceAbstraction took 12184.10ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 104.2MB in the beginning and 169.4MB in the end (delta: -65.2MB). Peak memory consumption was 88.6MB. Max. memory is 16.1GB. [2022-11-25 18:11:40,524 INFO L158 Benchmark]: Witness Printer took 50.28ms. Allocated memory is still 207.6MB. Free memory was 169.4MB in the beginning and 166.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:11:40,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 134.2MB. Free memory is still 79.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.74ms. Allocated memory is still 172.0MB. Free memory was 139.0MB in the beginning and 127.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.90ms. Allocated memory is still 172.0MB. Free memory was 127.1MB in the beginning and 125.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.37ms. Allocated memory is still 172.0MB. Free memory was 125.2MB in the beginning and 123.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 646.05ms. Allocated memory is still 172.0MB. Free memory was 123.8MB in the beginning and 104.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 12184.10ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 104.2MB in the beginning and 169.4MB in the end (delta: -65.2MB). Peak memory consumption was 88.6MB. Max. memory is 16.1GB. * Witness Printer took 50.28ms. Allocated memory is still 207.6MB. Free memory was 169.4MB in the beginning and 166.2MB 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: 8.6s, 213 PlacesBefore, 27 PlacesAfterwards, 217 TransitionsBefore, 20 TransitionsAfterwards, 9676 CoEnabledTransitionPairs, 8 FixpointIterations, 77 TrivialSequentialCompositions, 127 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 33 ConcurrentYvCompositions, 11 ChoiceCompositions, 257 TotalNumberOfCompositions, 8506 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8506, independent: 8506, independent conditional: 0, independent unconditional: 8506, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7035, independent: 7035, independent conditional: 0, independent unconditional: 7035, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7035, independent: 7035, independent conditional: 0, independent unconditional: 7035, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8506, independent: 1471, independent conditional: 0, independent unconditional: 1471, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 7035, unknown conditional: 0, unknown unconditional: 7035] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, 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: 77]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 58]: 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, 328 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: 12.0s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 438 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 216 mSDsluCounter, 93 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 413 IncrementalHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 74 mSDtfsCounter, 413 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, 0.3s 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, 1.8s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 611 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! [2022-11-25 18:11:40,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e54c5738-90b3-42c4-91d6-47238955ebe8/bin/uautomizer-ZsLfNo2U6R/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