./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP --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 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:43:14,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:43:14,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:43:14,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:43:14,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:43:14,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:43:14,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:43:14,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:43:14,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:43:14,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:43:14,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:43:14,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:43:14,424 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:43:14,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:43:14,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:43:14,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:43:14,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:43:14,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:43:14,429 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:43:14,429 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:43:14,430 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:43:14,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:43:14,431 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:43:14,431 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:43:14,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:43:14,432 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:43:14,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:43:14,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:43:14,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:43:14,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:43:14,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:43:14,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:43:14,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:43:14,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:43:14,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:43:14,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:43:14,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:43:14,439 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:43:14,439 INFO L153 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_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2023-11-06 22:43:14,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:43:14,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:43:14,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:43:14,818 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:43:14,819 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:43:14,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-06 22:43:18,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:43:18,425 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:43:18,426 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2023-11-06 22:43:18,438 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/data/2328214ec/4cf0299d3f2c493faa007f9996f08bfb/FLAGa843915c2 [2023-11-06 22:43:18,455 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/data/2328214ec/4cf0299d3f2c493faa007f9996f08bfb [2023-11-06 22:43:18,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:43:18,460 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:43:18,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:43:18,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:43:18,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:43:18,470 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e5c9dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18, skipping insertion in model container [2023-11-06 22:43:18,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:43:18,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:43:18,819 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:43:18,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:43:18,888 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:43:18,888 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:43:18,898 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:43:18,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18 WrapperNode [2023-11-06 22:43:18,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:43:18,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:43:18,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:43:18,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:43:18,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,968 INFO L138 Inliner]: procedures = 23, calls = 177, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 406 [2023-11-06 22:43:18,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:43:18,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:43:18,969 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:43:18,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:43:18,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:18,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:19,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:19,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:19,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:19,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:19,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:43:19,023 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:43:19,023 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:43:19,023 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:43:19,024 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (1/1) ... [2023-11-06 22:43:19,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:43:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:19,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:43:19,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d52e72b-48c4-4e3e-b876-c1a28f74a9f6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:43:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:43:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:43:19,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:43:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:43:19,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:43:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:43:19,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:43:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:43:19,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:43:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:43:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:43:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:43:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:43:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:43:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:43:19,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:43:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:43:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:43:19,135 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:43:19,268 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:43:19,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:43:19,869 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:43:20,215 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:43:20,215 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:43:20,220 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:20 BoogieIcfgContainer [2023-11-06 22:43:20,220 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:43:20,223 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:43:20,224 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:43:20,227 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:43:20,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:18" (1/3) ... [2023-11-06 22:43:20,228 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc44558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:20, skipping insertion in model container [2023-11-06 22:43:20,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:18" (2/3) ... [2023-11-06 22:43:20,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc44558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:20, skipping insertion in model container [2023-11-06 22:43:20,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:20" (3/3) ... [2023-11-06 22:43:20,233 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2023-11-06 22:43:20,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:43:20,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 22:43:20,257 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:43:20,378 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:43:20,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 234 transitions, 496 flow [2023-11-06 22:43:20,538 INFO L124 PetriNetUnfolderBase]: 2/230 cut-off events. [2023-11-06 22:43:20,538 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:20,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 230 events. 2/230 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 270 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 168. Up to 2 conditions per place. [2023-11-06 22:43:20,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 234 transitions, 496 flow [2023-11-06 22:43:20,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 225 transitions, 474 flow [2023-11-06 22:43:20,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:43:20,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 225 transitions, 474 flow [2023-11-06 22:43:20,575 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 225 transitions, 474 flow [2023-11-06 22:43:20,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 225 transitions, 474 flow [2023-11-06 22:43:20,689 INFO L124 PetriNetUnfolderBase]: 2/225 cut-off events. [2023-11-06 22:43:20,690 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:20,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 225 events. 2/225 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 269 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 168. Up to 2 conditions per place. [2023-11-06 22:43:20,700 INFO L119 LiptonReduction]: Number of co-enabled transitions 6800 [2023-11-06 22:43:29,835 INFO L134 LiptonReduction]: Checked pairs total: 69559 [2023-11-06 22:43:29,836 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-11-06 22:43:29,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:43:29,884 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;@170da9d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:43:29,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-06 22:43:29,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:43:29,889 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:43:29,889 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:43:29,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:29,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:43:29,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:29,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1198, now seen corresponding path program 1 times [2023-11-06 22:43:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:29,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359943528] [2023-11-06 22:43:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:30,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:30,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359943528] [2023-11-06 22:43:30,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359943528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:30,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:30,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:43:30,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577197729] [2023-11-06 22:43:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:30,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:43:30,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:43:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:43:30,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 405 [2023-11-06 22:43:30,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 94 transitions, 212 flow. Second operand has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 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) [2023-11-06 22:43:30,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:30,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 405 [2023-11-06 22:43:30,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:48,181 INFO L124 PetriNetUnfolderBase]: 103520/148279 cut-off events. [2023-11-06 22:43:48,182 INFO L125 PetriNetUnfolderBase]: For 2968/2968 co-relation queries the response was YES. [2023-11-06 22:43:48,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287064 conditions, 148279 events. 103520/148279 cut-off events. For 2968/2968 co-relation queries the response was YES. Maximal size of possible extension queue 4762. Compared 1171579 event pairs, 103520 based on Foata normal form. 0/129319 useless extension candidates. Maximal degree in co-relation 262908. Up to 136320 conditions per place. [2023-11-06 22:43:49,603 INFO L140 encePairwiseOnDemand]: 402/405 looper letters, 63 selfloop transitions, 0 changer transitions 0/91 dead transitions. [2023-11-06 22:43:49,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 91 transitions, 332 flow [2023-11-06 22:43:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:43:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:43:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 456 transitions. [2023-11-06 22:43:49,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2023-11-06 22:43:49,623 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 456 transitions. [2023-11-06 22:43:49,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 456 transitions. [2023-11-06 22:43:49,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:49,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 456 transitions. [2023-11-06 22:43:49,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.0) internal successors, (456), 2 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:49,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 405.0) internal successors, (1215), 3 states have internal predecessors, (1215), 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) [2023-11-06 22:43:49,648 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 405.0) internal successors, (1215), 3 states have internal predecessors, (1215), 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) [2023-11-06 22:43:49,650 INFO L175 Difference]: Start difference. First operand has 107 places, 94 transitions, 212 flow. Second operand 2 states and 456 transitions. [2023-11-06 22:43:49,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 91 transitions, 332 flow [2023-11-06 22:43:49,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 91 transitions, 316 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:43:49,830 INFO L231 Difference]: Finished difference. Result has 97 places, 91 transitions, 190 flow [2023-11-06 22:43:49,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2023-11-06 22:43:49,839 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -10 predicate places. [2023-11-06 22:43:49,839 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 190 flow [2023-11-06 22:43:49,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 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) [2023-11-06 22:43:49,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:49,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:43:49,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:43:49,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:49,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1184958, now seen corresponding path program 1 times [2023-11-06 22:43:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:49,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55725174] [2023-11-06 22:43:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:50,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:50,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55725174] [2023-11-06 22:43:50,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55725174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:50,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:50,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634743892] [2023-11-06 22:43:50,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:50,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 405 [2023-11-06 22:43:50,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 91 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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) [2023-11-06 22:43:50,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:50,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 405 [2023-11-06 22:43:50,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:03,530 INFO L124 PetriNetUnfolderBase]: 101568/145587 cut-off events. [2023-11-06 22:44:03,531 INFO L125 PetriNetUnfolderBase]: For 684/684 co-relation queries the response was YES. [2023-11-06 22:44:03,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280039 conditions, 145587 events. 101568/145587 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 4708. Compared 1149094 event pairs, 101568 based on Foata normal form. 0/127367 useless extension candidates. Maximal degree in co-relation 280036. Up to 133629 conditions per place. [2023-11-06 22:44:05,042 INFO L140 encePairwiseOnDemand]: 402/405 looper letters, 60 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-11-06 22:44:05,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 308 flow [2023-11-06 22:44:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:44:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-11-06 22:44:05,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-06 22:44:05,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-11-06 22:44:05,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-11-06 22:44:05,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:05,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-11-06 22:44:05,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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) [2023-11-06 22:44:05,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 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) [2023-11-06 22:44:05,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 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) [2023-11-06 22:44:05,063 INFO L175 Difference]: Start difference. First operand has 97 places, 91 transitions, 190 flow. Second operand 3 states and 630 transitions. [2023-11-06 22:44:05,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 308 flow [2023-11-06 22:44:05,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:44:05,067 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 188 flow [2023-11-06 22:44:05,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2023-11-06 22:44:05,069 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -10 predicate places. [2023-11-06 22:44:05,069 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 188 flow [2023-11-06 22:44:05,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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) [2023-11-06 22:44:05,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:05,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:44:05,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:44:05,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:05,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1184956, now seen corresponding path program 1 times [2023-11-06 22:44:05,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:05,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566126281] [2023-11-06 22:44:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:05,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566126281] [2023-11-06 22:44:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566126281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:05,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:05,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:44:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037450642] [2023-11-06 22:44:05,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:05,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 405 [2023-11-06 22:44:05,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 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) [2023-11-06 22:44:05,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:05,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 405 [2023-11-06 22:44:05,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand