./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9205365dcda04af07212d180b1c6367c5de79b6e0d2e09ec11b949fed58626f5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:33:38,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:33:38,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:33:38,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:33:38,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:33:38,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:33:38,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:33:38,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:33:38,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:33:38,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:33:38,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:33:38,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:33:38,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:33:38,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:33:38,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:33:38,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:33:38,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:33:38,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:33:38,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:33:38,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:33:38,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:33:38,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:33:38,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:33:38,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:33:38,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:33:38,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:33:38,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:33:38,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:33:38,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:33:38,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:33:38,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:33:38,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:33:38,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:33:38,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:33:38,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:33:38,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:33:38,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:33:38,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:33:38,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:33:38,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:33:38,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:33:38,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:33:38,390 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:33:38,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:33:38,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:33:38,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:33:38,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:33:38,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:33:38,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:33:38,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:33:38,393 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:33:38,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:33:38,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:33:38,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:33:38,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:33:38,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:33:38,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:33:38,399 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:33:38,399 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:33:38,400 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:33:38,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:33:38,400 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:33:38,400 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:33:38,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:33:38,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:33:38,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:33:38,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:33:38,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:33:38,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:33:38,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:33:38,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:33:38,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:33:38,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:33:38,402 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:33:38,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:33:38,403 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:33:38,403 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_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9205365dcda04af07212d180b1c6367c5de79b6e0d2e09ec11b949fed58626f5 [2022-12-13 18:33:38,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:33:38,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:33:38,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:33:38,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:33:38,620 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:33:38,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i [2022-12-13 18:33:41,183 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:33:41,384 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:33:41,385 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/sv-benchmarks/c/goblint-regression/06-symbeq_23-idxsense_nr.i [2022-12-13 18:33:41,395 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/data/28f792c8a/8fb66266def94067977245b2c0da2246/FLAG23939de58 [2022-12-13 18:33:41,406 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/data/28f792c8a/8fb66266def94067977245b2c0da2246 [2022-12-13 18:33:41,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:33:41,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:33:41,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:33:41,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:33:41,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:33:41,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753b3fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41, skipping insertion in model container [2022-12-13 18:33:41,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:33:41,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:33:41,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:33:41,706 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:33:41,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:33:41,774 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:33:41,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41 WrapperNode [2022-12-13 18:33:41,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:33:41,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:33:41,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:33:41,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:33:41,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,809 INFO L138 Inliner]: procedures = 161, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-12-13 18:33:41,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:33:41,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:33:41,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:33:41,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:33:41,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:33:41,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:33:41,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:33:41,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:33:41,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (1/1) ... [2022-12-13 18:33:41,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:33:41,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:33:41,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:33:41,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 18:33:41,889 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 18:33:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:33:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:33:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:33:41,890 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:33:41,976 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:33:41,978 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:33:42,139 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:33:42,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:33:42,144 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 18:33:42,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:33:42 BoogieIcfgContainer [2022-12-13 18:33:42,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:33:42,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:33:42,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:33:42,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:33:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:33:41" (1/3) ... [2022-12-13 18:33:42,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6638a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:33:42, skipping insertion in model container [2022-12-13 18:33:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:33:41" (2/3) ... [2022-12-13 18:33:42,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6638a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:33:42, skipping insertion in model container [2022-12-13 18:33:42,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:33:42" (3/3) ... [2022-12-13 18:33:42,152 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_23-idxsense_nr.i [2022-12-13 18:33:42,165 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:33:42,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 18:33:42,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:33:42,203 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:33:42,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 81 transitions, 167 flow [2022-12-13 18:33:42,267 INFO L130 PetriNetUnfolder]: 2/80 cut-off events. [2022-12-13 18:33:42,267 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:33:42,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2022-12-13 18:33:42,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 81 transitions, 167 flow [2022-12-13 18:33:42,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 80 transitions, 163 flow [2022-12-13 18:33:42,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:33:42,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 80 transitions, 163 flow [2022-12-13 18:33:42,286 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 80 transitions, 163 flow [2022-12-13 18:33:42,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 163 flow [2022-12-13 18:33:42,301 INFO L130 PetriNetUnfolder]: 2/80 cut-off events. [2022-12-13 18:33:42,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:33:42,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2022-12-13 18:33:42,302 INFO L119 LiptonReduction]: Number of co-enabled transitions 1050 [2022-12-13 18:33:43,720 INFO L134 LiptonReduction]: Checked pairs total: 2946 [2022-12-13 18:33:43,720 INFO L136 LiptonReduction]: Total number of compositions: 81 [2022-12-13 18:33:43,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:33:43,740 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;@54adbb13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:33:43,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 18:33:43,742 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:33:43,743 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:33:43,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:43,743 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:33:43,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash 9528, now seen corresponding path program 1 times [2022-12-13 18:33:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:43,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159679604] [2022-12-13 18:33:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:43,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:43,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159679604] [2022-12-13 18:33:43,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159679604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:33:43,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:33:43,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:33:43,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704547817] [2022-12-13 18:33:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:33:43,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:33:43,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:33:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:33:43,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 162 [2022-12-13 18:33:43,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 67 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:43,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:43,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 162 [2022-12-13 18:33:43,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:43,973 INFO L130 PetriNetUnfolder]: 85/199 cut-off events. [2022-12-13 18:33:43,973 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:33:43,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 199 events. 85/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 727 event pairs, 84 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 382. Up to 192 conditions per place. [2022-12-13 18:33:43,976 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 23 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2022-12-13 18:33:43,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 99 flow [2022-12-13 18:33:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:33:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:33:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 188 transitions. [2022-12-13 18:33:43,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2022-12-13 18:33:43,987 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 188 transitions. [2022-12-13 18:33:43,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 188 transitions. [2022-12-13 18:33:43,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:43,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 188 transitions. [2022-12-13 18:33:43,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.0) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:43,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:43,997 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:43,999 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 67 flow. Second operand 2 states and 188 transitions. [2022-12-13 18:33:44,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 99 flow [2022-12-13 18:33:44,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:33:44,003 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 52 flow [2022-12-13 18:33:44,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-12-13 18:33:44,008 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2022-12-13 18:33:44,008 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 52 flow [2022-12-13 18:33:44,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:44,009 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:33:44,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:33:44,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:44,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:44,010 INFO L85 PathProgramCache]: Analyzing trace with hash 9160543, now seen corresponding path program 1 times [2022-12-13 18:33:44,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:44,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129529796] [2022-12-13 18:33:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:44,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:44,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129529796] [2022-12-13 18:33:44,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129529796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:33:44,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:33:44,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:33:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228994773] [2022-12-13 18:33:44,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:33:44,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:33:44,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:33:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:33:44,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 162 [2022-12-13 18:33:44,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:44,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 162 [2022-12-13 18:33:44,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:44,165 INFO L130 PetriNetUnfolder]: 85/200 cut-off events. [2022-12-13 18:33:44,165 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:33:44,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 200 events. 85/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 727 event pairs, 84 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 394. Up to 192 conditions per place. [2022-12-13 18:33:44,167 INFO L137 encePairwiseOnDemand]: 159/162 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2022-12-13 18:33:44,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 102 flow [2022-12-13 18:33:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:33:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:33:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2022-12-13 18:33:44,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.51440329218107 [2022-12-13 18:33:44,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2022-12-13 18:33:44,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2022-12-13 18:33:44,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:44,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2022-12-13 18:33:44,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,175 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 52 flow. Second operand 3 states and 250 transitions. [2022-12-13 18:33:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 102 flow [2022-12-13 18:33:44,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:33:44,176 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 64 flow [2022-12-13 18:33:44,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 18:33:44,177 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2022-12-13 18:33:44,177 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 64 flow [2022-12-13 18:33:44,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:44,177 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:33:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:33:44,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 284280428, now seen corresponding path program 1 times [2022-12-13 18:33:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:44,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135321421] [2022-12-13 18:33:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:44,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135321421] [2022-12-13 18:33:44,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135321421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:33:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987188325] [2022-12-13 18:33:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:44,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:33:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:33:44,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:33:44,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:33:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:44,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:33:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:33:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:44,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:33:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987188325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:33:44,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:33:44,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 18:33:44,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639674345] [2022-12-13 18:33:44,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:33:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:33:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:33:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:33:44,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 162 [2022-12-13 18:33:44,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:44,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 162 [2022-12-13 18:33:44,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:44,419 INFO L130 PetriNetUnfolder]: 85/203 cut-off events. [2022-12-13 18:33:44,419 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:33:44,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 203 events. 85/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 734 event pairs, 84 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 408. Up to 192 conditions per place. [2022-12-13 18:33:44,421 INFO L137 encePairwiseOnDemand]: 159/162 looper letters, 22 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2022-12-13 18:33:44,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 130 flow [2022-12-13 18:33:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:33:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:33:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2022-12-13 18:33:44,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2022-12-13 18:33:44,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2022-12-13 18:33:44,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2022-12-13 18:33:44,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:44,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2022-12-13 18:33:44,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,427 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,427 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 6 states and 474 transitions. [2022-12-13 18:33:44,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 130 flow [2022-12-13 18:33:44,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 126 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 18:33:44,428 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 96 flow [2022-12-13 18:33:44,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2022-12-13 18:33:44,428 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2022-12-13 18:33:44,428 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 96 flow [2022-12-13 18:33:44,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:44,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:44,429 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 18:33:44,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:33:44,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 18:33:44,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -375807329, now seen corresponding path program 2 times [2022-12-13 18:33:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:44,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353938538] [2022-12-13 18:33:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:44,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353938538] [2022-12-13 18:33:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353938538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:33:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326348083] [2022-12-13 18:33:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:33:44,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:33:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:33:44,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:33:44,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:33:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:33:44,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:33:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:33:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:33:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:33:44,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:33:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:33:44,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:33:44,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326348083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:33:44,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:33:44,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 18:33:44,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917109997] [2022-12-13 18:33:44,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:33:44,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:33:44,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:33:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:33:45,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 162 [2022-12-13 18:33:45,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:45,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 162 [2022-12-13 18:33:45,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:45,083 INFO L130 PetriNetUnfolder]: 51/133 cut-off events. [2022-12-13 18:33:45,084 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:33:45,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 133 events. 51/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 395 event pairs, 40 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 280. Up to 101 conditions per place. [2022-12-13 18:33:45,085 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 27 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2022-12-13 18:33:45,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 162 flow [2022-12-13 18:33:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:33:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:33:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-12-13 18:33:45,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 18:33:45,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-12-13 18:33:45,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-12-13 18:33:45,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:45,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-12-13 18:33:45,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,092 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 96 flow. Second operand 3 states and 243 transitions. [2022-12-13 18:33:45,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 162 flow [2022-12-13 18:33:45,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 148 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 18:33:45,095 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 91 flow [2022-12-13 18:33:45,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2022-12-13 18:33:45,096 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2022-12-13 18:33:45,096 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 91 flow [2022-12-13 18:33:45,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:45,097 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 18:33:45,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 18:33:45,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:33:45,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -375807328, now seen corresponding path program 1 times [2022-12-13 18:33:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:45,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194322458] [2022-12-13 18:33:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:45,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:45,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194322458] [2022-12-13 18:33:45,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194322458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:33:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720906330] [2022-12-13 18:33:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:33:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:33:45,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:33:45,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:33:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:45,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:33:45,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:33:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:45,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:33:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:33:45,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720906330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:33:45,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:33:45,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 18:33:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873673431] [2022-12-13 18:33:45,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:33:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:33:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:33:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:33:45,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 162 [2022-12-13 18:33:45,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 91 flow. Second operand has 13 states, 13 states have (on average 75.23076923076923) internal successors, (978), 13 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:45,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 162 [2022-12-13 18:33:45,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:45,572 INFO L130 PetriNetUnfolder]: 51/139 cut-off events. [2022-12-13 18:33:45,573 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 18:33:45,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 139 events. 51/139 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 394 event pairs, 50 based on Foata normal form. 6/119 useless extension candidates. Maximal degree in co-relation 326. Up to 124 conditions per place. [2022-12-13 18:33:45,574 INFO L137 encePairwiseOnDemand]: 159/162 looper letters, 20 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2022-12-13 18:33:45,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 33 transitions, 189 flow [2022-12-13 18:33:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:33:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:33:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 925 transitions. [2022-12-13 18:33:45,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4758230452674897 [2022-12-13 18:33:45,576 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 925 transitions. [2022-12-13 18:33:45,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 925 transitions. [2022-12-13 18:33:45,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:45,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 925 transitions. [2022-12-13 18:33:45,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 77.08333333333333) internal successors, (925), 12 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 162.0) internal successors, (2106), 13 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,580 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 162.0) internal successors, (2106), 13 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,580 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 91 flow. Second operand 12 states and 925 transitions. [2022-12-13 18:33:45,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 33 transitions, 189 flow [2022-12-13 18:33:45,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 33 transitions, 183 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:33:45,581 INFO L231 Difference]: Finished difference. Result has 53 places, 33 transitions, 169 flow [2022-12-13 18:33:45,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=33} [2022-12-13 18:33:45,582 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2022-12-13 18:33:45,582 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 33 transitions, 169 flow [2022-12-13 18:33:45,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.23076923076923) internal successors, (978), 13 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:45,582 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 18:33:45,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:33:45,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:33:45,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1138499456, now seen corresponding path program 2 times [2022-12-13 18:33:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:45,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088185987] [2022-12-13 18:33:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:33:45,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:45,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088185987] [2022-12-13 18:33:45,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088185987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:33:45,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:33:45,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:33:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692193542] [2022-12-13 18:33:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:33:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:33:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:33:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:33:45,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 162 [2022-12-13 18:33:45,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 33 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:45,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:45,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 162 [2022-12-13 18:33:45,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:46,015 INFO L130 PetriNetUnfolder]: 33/99 cut-off events. [2022-12-13 18:33:46,015 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-13 18:33:46,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 99 events. 33/99 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 32 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 256. Up to 94 conditions per place. [2022-12-13 18:33:46,017 INFO L137 encePairwiseOnDemand]: 158/162 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 18:33:46,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 30 transitions, 219 flow [2022-12-13 18:33:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:33:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:33:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2022-12-13 18:33:46,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-12-13 18:33:46,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2022-12-13 18:33:46,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2022-12-13 18:33:46,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:46,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2022-12-13 18:33:46,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,020 INFO L175 Difference]: Start difference. First operand has 53 places, 33 transitions, 169 flow. Second operand 3 states and 234 transitions. [2022-12-13 18:33:46,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 30 transitions, 219 flow [2022-12-13 18:33:46,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 30 transitions, 171 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 18:33:46,024 INFO L231 Difference]: Finished difference. Result has 47 places, 30 transitions, 117 flow [2022-12-13 18:33:46,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=30} [2022-12-13 18:33:46,024 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2022-12-13 18:33:46,025 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 30 transitions, 117 flow [2022-12-13 18:33:46,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:46,025 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:33:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:33:46,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1338804686, now seen corresponding path program 1 times [2022-12-13 18:33:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:46,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234853070] [2022-12-13 18:33:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:33:46,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:46,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234853070] [2022-12-13 18:33:46,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234853070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:33:46,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:33:46,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:33:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101843952] [2022-12-13 18:33:46,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:33:46,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:33:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:33:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:33:46,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 162 [2022-12-13 18:33:46,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 30 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:46,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 162 [2022-12-13 18:33:46,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:46,242 INFO L130 PetriNetUnfolder]: 29/88 cut-off events. [2022-12-13 18:33:46,242 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 18:33:46,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 88 events. 29/88 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 183 event pairs, 24 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 204. Up to 60 conditions per place. [2022-12-13 18:33:46,244 INFO L137 encePairwiseOnDemand]: 158/162 looper letters, 24 selfloop transitions, 3 changer transitions 4/33 dead transitions. [2022-12-13 18:33:46,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 33 transitions, 184 flow [2022-12-13 18:33:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:33:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:33:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 306 transitions. [2022-12-13 18:33:46,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2022-12-13 18:33:46,246 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 306 transitions. [2022-12-13 18:33:46,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 306 transitions. [2022-12-13 18:33:46,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:46,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 306 transitions. [2022-12-13 18:33:46,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,248 INFO L175 Difference]: Start difference. First operand has 47 places, 30 transitions, 117 flow. Second operand 4 states and 306 transitions. [2022-12-13 18:33:46,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 33 transitions, 184 flow [2022-12-13 18:33:46,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 33 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:33:46,249 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 115 flow [2022-12-13 18:33:46,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2022-12-13 18:33:46,250 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2022-12-13 18:33:46,250 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 115 flow [2022-12-13 18:33:46,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:33:46,250 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:33:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:33:46,251 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:33:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:33:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash -156045142, now seen corresponding path program 1 times [2022-12-13 18:33:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:33:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725033212] [2022-12-13 18:33:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:33:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:33:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:33:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:33:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:33:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725033212] [2022-12-13 18:33:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725033212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:33:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:33:46,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:33:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876971123] [2022-12-13 18:33:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:33:46,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:33:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:33:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:33:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:33:46,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 162 [2022-12-13 18:33:46,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:33:46,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 162 [2022-12-13 18:33:46,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:33:46,436 INFO L130 PetriNetUnfolder]: 17/59 cut-off events. [2022-12-13 18:33:46,436 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 18:33:46,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 59 events. 17/59 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 16 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 149. Up to 44 conditions per place. [2022-12-13 18:33:46,437 INFO L137 encePairwiseOnDemand]: 158/162 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2022-12-13 18:33:46,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 25 transitions, 155 flow [2022-12-13 18:33:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:33:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:33:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2022-12-13 18:33:46,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2022-12-13 18:33:46,438 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2022-12-13 18:33:46,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2022-12-13 18:33:46,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:33:46,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2022-12-13 18:33:46,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,439 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 115 flow. Second operand 4 states and 256 transitions. [2022-12-13 18:33:46,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 25 transitions, 155 flow [2022-12-13 18:33:46,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 25 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 18:33:46,441 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2022-12-13 18:33:46,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2022-12-13 18:33:46,441 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2022-12-13 18:33:46,441 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2022-12-13 18:33:46,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:33:46,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2022-12-13 18:33:46,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-12-13 18:33:46,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-12-13 18:33:46,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-12-13 18:33:46,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-12-13 18:33:46,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-12-13 18:33:46,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2022-12-13 18:33:46,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2022-12-13 18:33:46,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2022-12-13 18:33:46,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2022-12-13 18:33:46,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2022-12-13 18:33:46,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2022-12-13 18:33:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:33:46,447 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-12-13 18:33:46,453 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 18:33:46,453 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 18:33:46,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 06:33:46 BasicIcfg [2022-12-13 18:33:46,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 18:33:46,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 18:33:46,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 18:33:46,456 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 18:33:46,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:33:42" (3/4) ... [2022-12-13 18:33:46,458 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 18:33:46,463 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-12-13 18:33:46,466 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-12-13 18:33:46,466 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 18:33:46,466 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 18:33:46,489 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 18:33:46,489 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 18:33:46,489 INFO L158 Benchmark]: Toolchain (without parser) took 5080.18ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 91.7MB in the beginning and 47.9MB in the end (delta: 43.8MB). Peak memory consumption was 72.3MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,490 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 127.9MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:33:46,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.24ms. Allocated memory is still 127.9MB. Free memory was 91.3MB in the beginning and 72.5MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,490 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.51ms. Allocated memory is still 127.9MB. Free memory was 72.5MB in the beginning and 70.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,490 INFO L158 Benchmark]: Boogie Preprocessor took 24.29ms. Allocated memory is still 127.9MB. Free memory was 70.4MB in the beginning and 69.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,491 INFO L158 Benchmark]: RCFGBuilder took 311.32ms. Allocated memory is still 127.9MB. Free memory was 69.1MB in the beginning and 54.8MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,491 INFO L158 Benchmark]: TraceAbstraction took 4308.10ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 54.1MB in the beginning and 50.0MB in the end (delta: 4.0MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,491 INFO L158 Benchmark]: Witness Printer took 33.16ms. Allocated memory is still 155.2MB. Free memory was 50.0MB in the beginning and 47.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:33:46,492 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 127.9MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 364.24ms. Allocated memory is still 127.9MB. Free memory was 91.3MB in the beginning and 72.5MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.51ms. Allocated memory is still 127.9MB. Free memory was 72.5MB in the beginning and 70.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.29ms. Allocated memory is still 127.9MB. Free memory was 70.4MB in the beginning and 69.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 311.32ms. Allocated memory is still 127.9MB. Free memory was 69.1MB in the beginning and 54.8MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 4308.10ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 54.1MB in the beginning and 50.0MB in the end (delta: 4.0MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. * Witness Printer took 33.16ms. Allocated memory is still 155.2MB. Free memory was 50.0MB in the beginning and 47.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 82 PlacesBefore, 35 PlacesAfterwards, 80 TransitionsBefore, 32 TransitionsAfterwards, 1050 CoEnabledTransitionPairs, 5 FixpointIterations, 28 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 81 TotalNumberOfCompositions, 2946 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1449, independent: 1276, independent conditional: 0, independent unconditional: 1276, dependent: 173, dependent conditional: 0, dependent unconditional: 173, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 624, independent: 587, independent conditional: 0, independent unconditional: 587, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1449, independent: 689, independent conditional: 0, independent unconditional: 689, dependent: 136, dependent conditional: 0, dependent unconditional: 136, unknown: 624, unknown conditional: 0, unknown unconditional: 624] , Statistics on independence cache: Total cache size (in pairs): 77, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 687]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 97 locations, 20 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 475 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 290 mSDsluCounter, 18 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 76 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 712 IncrementalHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 76 mSolverCounterUnsat, 11 mSDtfsCounter, 712 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=5, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 108 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 644 SizeOfPredicates, 2 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 175/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 18:33:46,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f5547b-d9b9-4e9b-a589-899b764e66a1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE