./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i --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_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/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_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/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_ab8964de-fb84-4d62-a2ef-512caebb730a/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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- 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 16:59:20,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:59:20,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:59:20,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:59:20,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:59:20,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:59:20,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:59:20,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:59:20,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:59:20,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:59:20,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:59:20,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:59:20,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:59:20,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:59:20,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:59:20,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:59:20,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:59:20,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:59:20,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:59:20,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:59:20,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:59:20,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:59:20,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:59:20,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:59:20,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:59:20,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:59:20,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:59:20,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:59:20,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:59:20,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:59:20,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:59:20,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:59:20,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:59:20,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:59:20,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:59:20,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:59:20,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:59:20,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:59:20,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:59:20,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:59:20,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:59:20,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:59:20,381 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:59:20,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:59:20,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:59:20,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:59:20,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:59:20,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:59:20,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:59:20,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:59:20,385 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:59:20,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:59:20,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:59:20,385 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:59:20,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:59:20,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:59:20,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:59:20,386 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:59:20,387 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:59:20,387 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:59:20,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:59:20,387 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:59:20,388 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:59:20,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:59:20,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:59:20,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:59:20,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:59:20,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:59:20,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:59:20,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:59:20,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:59:20,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:59:20,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:59:20,390 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:59:20,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:59:20,391 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_ab8964de-fb84-4d62-a2ef-512caebb730a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2022-11-25 16:59:20,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:59:20,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:59:20,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:59:20,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:59:20,749 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:59:20,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-11-25 16:59:23,729 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:59:24,064 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:59:24,065 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-11-25 16:59:24,087 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/data/abac8a77e/e815334c00224c23b153f62b47f069e1/FLAG26392968c [2022-11-25 16:59:24,110 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/data/abac8a77e/e815334c00224c23b153f62b47f069e1 [2022-11-25 16:59:24,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:59:24,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:59:24,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:59:24,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:59:24,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:59:24,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:24,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc4208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24, skipping insertion in model container [2022-11-25 16:59:24,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:24,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:59:24,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:59:24,736 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_ab8964de-fb84-4d62-a2ef-512caebb730a/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-11-25 16:59:24,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:59:24,818 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:59:24,865 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_ab8964de-fb84-4d62-a2ef-512caebb730a/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-11-25 16:59:24,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:59:24,946 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:59:24,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24 WrapperNode [2022-11-25 16:59:24,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:59:24,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:59:24,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:59:24,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:59:24,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:24,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,009 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2022-11-25 16:59:25,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:59:25,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:59:25,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:59:25,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:59:25,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:59:25,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:59:25,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:59:25,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:59:25,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (1/1) ... [2022-11-25 16:59:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:59:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:25,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:59:25,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:59:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:59:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 16:59:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-25 16:59:25,187 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-25 16:59:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:59:25,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:59:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-25 16:59:25,191 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-25 16:59:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:59:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 16:59:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:59:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:59:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 16:59:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:59:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:59:25,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:59:25,194 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 16:59:25,418 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:59:25,420 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:59:25,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:59:25,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:59:25,926 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-25 16:59:25,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:59:25 BoogieIcfgContainer [2022-11-25 16:59:25,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:59:25,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:59:25,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:59:25,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:59:25,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:59:24" (1/3) ... [2022-11-25 16:59:25,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f736a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:59:25, skipping insertion in model container [2022-11-25 16:59:25,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:24" (2/3) ... [2022-11-25 16:59:25,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f736a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:59:25, skipping insertion in model container [2022-11-25 16:59:25,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:59:25" (3/3) ... [2022-11-25 16:59:25,946 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2022-11-25 16:59:25,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:59:25,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-25 16:59:25,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:59:26,141 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 16:59:26,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 261 transitions, 544 flow [2022-11-25 16:59:26,433 INFO L130 PetriNetUnfolder]: 52/501 cut-off events. [2022-11-25 16:59:26,433 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 16:59:26,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 501 events. 52/501 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2281 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 253. Up to 8 conditions per place. [2022-11-25 16:59:26,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 261 transitions, 544 flow [2022-11-25 16:59:26,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 261 transitions, 544 flow [2022-11-25 16:59:26,467 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:59:26,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 261 transitions, 544 flow [2022-11-25 16:59:26,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 261 transitions, 544 flow [2022-11-25 16:59:26,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 261 transitions, 544 flow [2022-11-25 16:59:26,627 INFO L130 PetriNetUnfolder]: 52/501 cut-off events. [2022-11-25 16:59:26,628 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 16:59:26,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 501 events. 52/501 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2281 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 253. Up to 8 conditions per place. [2022-11-25 16:59:26,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 22772 [2022-11-25 16:59:59,694 INFO L134 LiptonReduction]: Checked pairs total: 62487 [2022-11-25 16:59:59,695 INFO L136 LiptonReduction]: Total number of compositions: 241 [2022-11-25 16:59:59,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:59,719 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;@963e32b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:59,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-11-25 16:59:59,721 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 16:59:59,721 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:59:59,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:59,722 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 16:59:59,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 16:59:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1031, now seen corresponding path program 1 times [2022-11-25 16:59:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:59,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524506692] [2022-11-25 16:59:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:59,907 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 16:59:59,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:59,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524506692] [2022-11-25 16:59:59,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524506692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:59,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:59,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 16:59:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556592385] [2022-11-25 16:59:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:59,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:59:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:59:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:59:59,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 502 [2022-11-25 16:59:59,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 16:59:59,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:59,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 502 [2022-11-25 16:59:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:02,753 INFO L130 PetriNetUnfolder]: 12680/22288 cut-off events. [2022-11-25 17:00:02,754 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-25 17:00:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41862 conditions, 22288 events. 12680/22288 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 178964 event pairs, 12082 based on Foata normal form. 720/11918 useless extension candidates. Maximal degree in co-relation 39495. Up to 19450 conditions per place. [2022-11-25 17:00:02,930 INFO L137 encePairwiseOnDemand]: 487/502 looper letters, 69 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-11-25 17:00:02,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 338 flow [2022-11-25 17:00:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:00:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:00:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 560 transitions. [2022-11-25 17:00:02,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5577689243027888 [2022-11-25 17:00:02,947 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 560 transitions. [2022-11-25 17:00:02,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 560 transitions. [2022-11-25 17:00:02,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:02,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 560 transitions. [2022-11-25 17:00:02,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 280.0) internal successors, (560), 2 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:02,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 17:00:02,965 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 17:00:02,967 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 230 flow. Second operand 2 states and 560 transitions. [2022-11-25 17:00:02,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 338 flow [2022-11-25 17:00:02,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:00:02,979 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 200 flow [2022-11-25 17:00:02,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2022-11-25 17:00:02,985 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2022-11-25 17:00:02,985 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 200 flow [2022-11-25 17:00:02,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 17:00:02,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:02,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:00:02,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:00:02,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 32952, now seen corresponding path program 1 times [2022-11-25 17:00:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395284240] [2022-11-25 17:00:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:03,272 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 17:00:03,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395284240] [2022-11-25 17:00:03,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395284240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:03,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:03,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:00:03,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085718472] [2022-11-25 17:00:03,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:03,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:03,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 502 [2022-11-25 17:00:03,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 17:00:03,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:03,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 502 [2022-11-25 17:00:03,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:05,927 INFO L130 PetriNetUnfolder]: 12592/21461 cut-off events. [2022-11-25 17:00:05,927 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-25 17:00:05,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41008 conditions, 21461 events. 12592/21461 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 166590 event pairs, 8439 based on Foata normal form. 0/11188 useless extension candidates. Maximal degree in co-relation 41003. Up to 13691 conditions per place. [2022-11-25 17:00:06,055 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 105 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-11-25 17:00:06,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 488 flow [2022-11-25 17:00:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-11-25 17:00:06,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5285524568393094 [2022-11-25 17:00:06,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-11-25 17:00:06,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-11-25 17:00:06,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:06,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-11-25 17:00:06,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:06,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:06,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:06,074 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 200 flow. Second operand 3 states and 796 transitions. [2022-11-25 17:00:06,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 488 flow [2022-11-25 17:00:06,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 126 transitions, 488 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:00:06,086 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 200 flow [2022-11-25 17:00:06,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2022-11-25 17:00:06,091 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2022-11-25 17:00:06,091 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 200 flow [2022-11-25 17:00:06,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 17:00:06,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:06,092 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:00:06,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:00:06,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 32954, now seen corresponding path program 1 times [2022-11-25 17:00:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:06,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716423159] [2022-11-25 17:00:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:06,273 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 17:00:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:06,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716423159] [2022-11-25 17:00:06,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716423159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:06,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:06,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:00:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453673876] [2022-11-25 17:00:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:06,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:06,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 502 [2022-11-25 17:00:06,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 17:00:06,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:06,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 502 [2022-11-25 17:00:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:08,520 INFO L130 PetriNetUnfolder]: 11774/20308 cut-off events. [2022-11-25 17:00:08,521 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2022-11-25 17:00:08,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38857 conditions, 20308 events. 11774/20308 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 156608 event pairs, 10807 based on Foata normal form. 0/10965 useless extension candidates. Maximal degree in co-relation 38851. Up to 18006 conditions per place. [2022-11-25 17:00:08,648 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 67 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2022-11-25 17:00:08,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 346 flow [2022-11-25 17:00:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2022-11-25 17:00:08,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5079681274900398 [2022-11-25 17:00:08,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2022-11-25 17:00:08,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2022-11-25 17:00:08,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:08,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2022-11-25 17:00:08,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 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 17:00:08,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:08,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:08,663 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 200 flow. Second operand 3 states and 765 transitions. [2022-11-25 17:00:08,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 346 flow [2022-11-25 17:00:08,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:08,674 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 217 flow [2022-11-25 17:00:08,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2022-11-25 17:00:08,677 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -2 predicate places. [2022-11-25 17:00:08,678 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 217 flow [2022-11-25 17:00:08,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 17:00:08,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:08,679 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:00:08,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:00:08,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:08,681 INFO L85 PathProgramCache]: Analyzing trace with hash 982460021, now seen corresponding path program 1 times [2022-11-25 17:00:08,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:08,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017419507] [2022-11-25 17:00:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:08,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:08,930 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 17:00:08,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:08,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017419507] [2022-11-25 17:00:08,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017419507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:08,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:08,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:08,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237795702] [2022-11-25 17:00:08,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:08,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:09,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 502 [2022-11-25 17:00:09,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 17:00:09,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:09,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 502 [2022-11-25 17:00:09,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:12,487 INFO L130 PetriNetUnfolder]: 21809/37838 cut-off events. [2022-11-25 17:00:12,487 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-11-25 17:00:12,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71938 conditions, 37838 events. 21809/37838 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 330686 event pairs, 9224 based on Foata normal form. 0/19454 useless extension candidates. Maximal degree in co-relation 71931. Up to 17484 conditions per place. [2022-11-25 17:00:12,664 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 128 selfloop transitions, 3 changer transitions 0/151 dead transitions. [2022-11-25 17:00:12,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 622 flow [2022-11-25 17:00:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2022-11-25 17:00:12,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5551128818061088 [2022-11-25 17:00:12,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2022-11-25 17:00:12,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2022-11-25 17:00:12,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:12,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2022-11-25 17:00:12,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 17:00:12,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:12,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:12,685 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 217 flow. Second operand 3 states and 836 transitions. [2022-11-25 17:00:12,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 622 flow [2022-11-25 17:00:12,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:12,692 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 231 flow [2022-11-25 17:00:12,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2022-11-25 17:00:12,694 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, 0 predicate places. [2022-11-25 17:00:12,695 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 231 flow [2022-11-25 17:00:12,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 17:00:12,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:12,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:00:12,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:00:12,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash 982460023, now seen corresponding path program 1 times [2022-11-25 17:00:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:12,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996746492] [2022-11-25 17:00:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:12,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:12,792 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 17:00:12,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:12,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996746492] [2022-11-25 17:00:12,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996746492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:12,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:12,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923879650] [2022-11-25 17:00:12,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:12,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:12,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:12,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:12,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 502 [2022-11-25 17:00:12,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 17:00:12,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:12,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 502 [2022-11-25 17:00:12,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:16,867 INFO L130 PetriNetUnfolder]: 26738/46999 cut-off events. [2022-11-25 17:00:16,867 INFO L131 PetriNetUnfolder]: For 3634/3634 co-relation queries the response was YES. [2022-11-25 17:00:16,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89813 conditions, 46999 events. 26738/46999 cut-off events. For 3634/3634 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 424920 event pairs, 13044 based on Foata normal form. 0/26271 useless extension candidates. Maximal degree in co-relation 89805. Up to 29750 conditions per place. [2022-11-25 17:00:17,063 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 126 selfloop transitions, 5 changer transitions 0/150 dead transitions. [2022-11-25 17:00:17,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 626 flow [2022-11-25 17:00:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2022-11-25 17:00:17,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5551128818061088 [2022-11-25 17:00:17,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2022-11-25 17:00:17,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2022-11-25 17:00:17,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:17,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2022-11-25 17:00:17,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 17:00:17,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:17,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 17:00:17,079 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 231 flow. Second operand 3 states and 836 transitions. [2022-11-25 17:00:17,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 626 flow [2022-11-25 17:00:17,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:17,088 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 262 flow [2022-11-25 17:00:17,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2022-11-25 17:00:17,091 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2022-11-25 17:00:17,091 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 262 flow [2022-11-25 17:00:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 17:00:17,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:17,092 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:00:17,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:00:17,093 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash 982460557, now seen corresponding path program 1 times [2022-11-25 17:00:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:17,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059613252] [2022-11-25 17:00:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:17,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:17,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059613252] [2022-11-25 17:00:17,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059613252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:17,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510283444] [2022-11-25 17:00:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:17,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:17,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:17,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:00:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:17,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:00:17,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:17,511 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:00:17,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 17:00:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:17,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:17,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510283444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:17,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:17,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:00:17,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075117560] [2022-11-25 17:00:17,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:17,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:00:17,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:00:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:00:18,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 502 [2022-11-25 17:00:18,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 262 flow. Second operand has 8 states, 8 states have (on average 227.875) internal successors, (1823), 8 states have internal predecessors, (1823), 0 states have call successors, (0), 0 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 17:00:18,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:18,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 502 [2022-11-25 17:00:18,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:20,592 INFO L130 PetriNetUnfolder]: 12891/22256 cut-off events. [2022-11-25 17:00:20,593 INFO L131 PetriNetUnfolder]: For 2452/2452 co-relation queries the response was YES. [2022-11-25 17:00:20,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44055 conditions, 22256 events. 12891/22256 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 175607 event pairs, 7572 based on Foata normal form. 13/12782 useless extension candidates. Maximal degree in co-relation 44046. Up to 19637 conditions per place. [2022-11-25 17:00:20,703 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 85 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2022-11-25 17:00:20,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 478 flow [2022-11-25 17:00:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:00:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:00:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1449 transitions. [2022-11-25 17:00:20,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4810756972111554 [2022-11-25 17:00:20,708 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1449 transitions. [2022-11-25 17:00:20,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1449 transitions. [2022-11-25 17:00:20,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:20,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1449 transitions. [2022-11-25 17:00:20,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.5) internal successors, (1449), 6 states have internal predecessors, (1449), 0 states have call successors, (0), 0 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 17:00:20,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 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 17:00:20,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 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 17:00:20,720 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 262 flow. Second operand 6 states and 1449 transitions. [2022-11-25 17:00:20,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 478 flow [2022-11-25 17:00:20,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 112 transitions, 468 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:20,728 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 250 flow [2022-11-25 17:00:20,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-11-25 17:00:20,729 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2022-11-25 17:00:20,729 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 250 flow [2022-11-25 17:00:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 227.875) internal successors, (1823), 8 states have internal predecessors, (1823), 0 states have call successors, (0), 0 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 17:00:20,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:20,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:00:20,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8964de-fb84-4d62-a2ef-512caebb730a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:00:20,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 391490340, now seen corresponding path program 1 times [2022-11-25 17:00:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:20,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257260018] [2022-11-25 17:00:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:21,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257260018] [2022-11-25 17:00:21,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257260018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:21,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:21,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:00:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809845198] [2022-11-25 17:00:21,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:21,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:00:21,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:00:21,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:00:21,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 502 [2022-11-25 17:00:21,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 0 states have call successors, (0), 0 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 17:00:21,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:21,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 502 [2022-11-25 17:00:21,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:23,564 INFO L130 PetriNetUnfolder]: 13972/23931 cut-off events. [2022-11-25 17:00:23,564 INFO L131 PetriNetUnfolder]: For 1517/1517 co-relation queries the response was YES. [2022-11-25 17:00:23,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46929 conditions, 23931 events. 13972/23931 cut-off events. For 1517/1517 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 188402 event pairs, 8581 based on Foata normal form. 0/13284 useless extension candidates. Maximal degree in co-relation 46920. Up to 21268 conditions per place. [2022-11-25 17:00:23,672 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 79 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2022-11-25 17:00:23,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 104 transitions, 458 flow [2022-11-25 17:00:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1007 transitions. [2022-11-25 17:00:23,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5014940239043825 [2022-11-25 17:00:23,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1007 transitions. [2022-11-25 17:00:23,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1007 transitions. [2022-11-25 17:00:23,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:23,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1007 transitions. [2022-11-25 17:00:23,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 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 17:00:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 17:00:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 17:00:23,685 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 250 flow. Second operand 4 states and 1007 transitions. [2022-11-25 17:00:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 104 transitions, 458 flow [2022-11-25 17:00:23,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 435 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 17:00:23,689 INFO L231 Difference]: Finished difference. Result has 98 places, 92 transitions, 261 flow [2022-11-25 17:00:23,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=98, PETRI_TRANSITIONS=92} [2022-11-25 17:00:23,690 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, 6 predicate places. [2022-11-25 17:00:23,690 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 92 transitions, 261 flow [2022-11-25 17:00:23,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 0 states have call successors, (0), 0 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 17:00:23,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:23,691 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:00:23,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:00:23,691 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:00:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 391506920, now seen corresponding path program 1 times [2022-11-25 17:00:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:23,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734290989] [2022-11-25 17:00:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:00:23,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:00:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:00:23,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:00:23,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:00:23,775 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (64 of 65 remaining) [2022-11-25 17:00:23,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 65 remaining) [2022-11-25 17:00:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 65 remaining) [2022-11-25 17:00:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 65 remaining) [2022-11-25 17:00:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 65 remaining) [2022-11-25 17:00:23,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 65 remaining) [2022-11-25 17:00:23,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 65 remaining) [2022-11-25 17:00:23,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 65 remaining) [2022-11-25 17:00:23,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 65 remaining) [2022-11-25 17:00:23,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 65 remaining) [2022-11-25 17:00:23,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 65 remaining) [2022-11-25 17:00:23,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 65 remaining) [2022-11-25 17:00:23,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 65 remaining) [2022-11-25 17:00:23,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 65 remaining) [2022-11-25 17:00:23,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 65 remaining) [2022-11-25 17:00:23,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (49 of 65 remaining) [2022-11-25 17:00:23,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 65 remaining) [2022-11-25 17:00:23,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 65 remaining) [2022-11-25 17:00:23,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 65 remaining) [2022-11-25 17:00:23,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 65 remaining) [2022-11-25 17:00:23,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 65 remaining) [2022-11-25 17:00:23,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 65 remaining) [2022-11-25 17:00:23,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 65 remaining) [2022-11-25 17:00:23,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 65 remaining) [2022-11-25 17:00:23,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 65 remaining) [2022-11-25 17:00:23,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 65 remaining) [2022-11-25 17:00:23,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 65 remaining) [2022-11-25 17:00:23,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 65 remaining) [2022-11-25 17:00:23,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (36 of 65 remaining) [2022-11-25 17:00:23,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 65 remaining) [2022-11-25 17:00:23,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 65 remaining) [2022-11-25 17:00:23,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 65 remaining) [2022-11-25 17:00:23,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 65 remaining) [2022-11-25 17:00:23,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 65 remaining) [2022-11-25 17:00:23,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 65 remaining) [2022-11-25 17:00:23,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 65 remaining) [2022-11-25 17:00:23,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 65 remaining) [2022-11-25 17:00:23,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 65 remaining) [2022-11-25 17:00:23,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 65 remaining) [2022-11-25 17:00:23,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 65 remaining) [2022-11-25 17:00:23,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 65 remaining) [2022-11-25 17:00:23,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 65 remaining) [2022-11-25 17:00:23,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 65 remaining) [2022-11-25 17:00:23,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 65 remaining) [2022-11-25 17:00:23,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 65 remaining) [2022-11-25 17:00:23,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 65 remaining) [2022-11-25 17:00:23,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 65 remaining) [2022-11-25 17:00:23,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 65 remaining) [2022-11-25 17:00:23,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 65 remaining) [2022-11-25 17:00:23,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 65 remaining) [2022-11-25 17:00:23,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 65 remaining) [2022-11-25 17:00:23,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 65 remaining) [2022-11-25 17:00:23,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 65 remaining) [2022-11-25 17:00:23,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 65 remaining) [2022-11-25 17:00:23,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (10 of 65 remaining) [2022-11-25 17:00:23,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 65 remaining) [2022-11-25 17:00:23,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 65 remaining) [2022-11-25 17:00:23,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 65 remaining) [2022-11-25 17:00:23,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 65 remaining) [2022-11-25 17:00:23,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 65 remaining) [2022-11-25 17:00:23,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 65 remaining) [2022-11-25 17:00:23,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 65 remaining) [2022-11-25 17:00:23,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 65 remaining) [2022-11-25 17:00:23,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 65 remaining) [2022-11-25 17:00:23,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 65 remaining) [2022-11-25 17:00:23,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:00:23,798 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:23,801 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:00:23,801 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:00:23,875 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-25 17:00:23,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 408 transitions, 864 flow [2022-11-25 17:00:24,200 INFO L130 PetriNetUnfolder]: 191/1480 cut-off events. [2022-11-25 17:00:24,200 INFO L131 PetriNetUnfolder]: For 72/118 co-relation queries the response was YES. [2022-11-25 17:00:24,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 1480 events. 191/1480 cut-off events. For 72/118 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10002 event pairs, 2 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 922. Up to 32 conditions per place. [2022-11-25 17:00:24,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 408 transitions, 864 flow [2022-11-25 17:00:24,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 408 transitions, 864 flow [2022-11-25 17:00:24,239 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:00:24,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 408 transitions, 864 flow [2022-11-25 17:00:24,240 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 408 transitions, 864 flow [2022-11-25 17:00:24,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 408 transitions, 864 flow [2022-11-25 17:00:24,528 INFO L130 PetriNetUnfolder]: 191/1480 cut-off events. [2022-11-25 17:00:24,528 INFO L131 PetriNetUnfolder]: For 72/118 co-relation queries the response was YES. [2022-11-25 17:00:24,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 1480 events. 191/1480 cut-off events. For 72/118 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10002 event pairs, 2 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 922. Up to 32 conditions per place. [2022-11-25 17:00:24,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 87992 [2022-11-25 17:00:44,719 INFO L134 LiptonReduction]: Checked pairs total: 286168 [2022-11-25 17:00:44,719 INFO L136 LiptonReduction]: Total number of compositions: 364 [2022-11-25 17:00:44,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:00:44,722 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;@963e32b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:00:44,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2022-11-25 17:00:44,723 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:00:44,723 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:00:44,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:44,723 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:00:44,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2022-11-25 17:00:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1945, now seen corresponding path program 1 times [2022-11-25 17:00:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:44,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800766152] [2022-11-25 17:00:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:44,730 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 17:00:44,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:44,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800766152] [2022-11-25 17:00:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800766152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:44,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:44,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:00:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616086863] [2022-11-25 17:00:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:44,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:00:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:00:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:00:44,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 772 [2022-11-25 17:00:44,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 178 transitions, 404 flow. Second operand has 2 states, 2 states have (on average 366.5) internal successors, (733), 2 states have internal predecessors, (733), 0 states have call successors, (0), 0 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 17:00:44,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:44,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 772 [2022-11-25 17:00:44,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand