./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:47,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:47,567 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:42:47,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:47,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:47,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:47,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:47,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:47,606 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:47,607 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:47,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:47,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:47,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:47,609 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:47,610 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:47,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:47,611 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:47,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:47,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:47,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:47,614 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:42:47,614 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:42:47,615 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:42:47,616 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:47,616 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:42:47,617 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:42:47,617 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:47,618 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:47,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:47,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:47,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:47,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:47,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:47,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:47,622 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:47,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:47,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:47,624 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:47,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:47,625 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:47,625 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:47,626 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_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-24 21:42:47,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:47,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:47,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:47,947 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:47,948 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:47,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-24 21:42:51,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:42:51,214 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:42:51,215 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-24 21:42:51,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/data/38d4f11f4/af37a524ff674b91ad63b9aafd37eef5/FLAGaaecab071 [2023-11-24 21:42:51,241 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/data/38d4f11f4/af37a524ff674b91ad63b9aafd37eef5 [2023-11-24 21:42:51,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:42:51,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:42:51,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:51,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:42:51,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:42:51,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4845c8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51, skipping insertion in model container [2023-11-24 21:42:51,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,285 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:42:51,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:51,554 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:42:51,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:51,610 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:42:51,610 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:42:51,619 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:42:51,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51 WrapperNode [2023-11-24 21:42:51,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:51,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:51,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:42:51,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:42:51,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,690 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-24 21:42:51,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:51,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:42:51,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:42:51,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:42:51,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,715 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,746 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 21:42:51,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,764 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:42:51,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:42:51,780 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:42:51,780 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:42:51,781 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:51,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:42:51,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:42:51,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:42:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:42:51,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:42:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:42:51,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:42:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:42:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:42:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:42:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:42:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:42:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:42:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:42:51,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:42:51,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:42:51,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:42:51,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:42:51,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:42:51,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:42:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:42:51,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:42:51,871 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:42:52,014 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:42:52,018 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:42:52,275 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:42:52,539 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:42:52,540 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:42:52,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:52 BoogieIcfgContainer [2023-11-24 21:42:52,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:42:52,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:42:52,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:42:52,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:42:52,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:42:51" (1/3) ... [2023-11-24 21:42:52,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fb16ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:52, skipping insertion in model container [2023-11-24 21:42:52,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (2/3) ... [2023-11-24 21:42:52,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fb16ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:52, skipping insertion in model container [2023-11-24 21:42:52,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:52" (3/3) ... [2023-11-24 21:42:52,551 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-24 21:42:52,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:42:52,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-24 21:42:52,573 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:42:52,621 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:42:52,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-24 21:42:52,694 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-24 21:42:52,694 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:42:52,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 2/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-24 21:42:52,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-24 21:42:52,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-24 21:42:52,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:42:52,723 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;@725cdc5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:42:52,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-24 21:42:52,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:42:52,729 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:42:52,729 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:42:52,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:52,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:42:52,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:52,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 8570, now seen corresponding path program 1 times [2023-11-24 21:42:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:52,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009802633] [2023-11-24 21:42:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009802633] [2023-11-24 21:42:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009802633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:53,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:53,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955523606] [2023-11-24 21:42:53,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:53,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:53,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-24 21:42:53,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-11-24 21:42:53,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:53,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-24 21:42:53,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:53,218 INFO L124 PetriNetUnfolderBase]: 72/159 cut-off events. [2023-11-24 21:42:53,218 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:42:53,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 159 events. 72/159 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 48 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 254. Up to 123 conditions per place. [2023-11-24 21:42:53,224 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-24 21:42:53,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 104 flow [2023-11-24 21:42:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-24 21:42:53,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2023-11-24 21:42:53,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-24 21:42:53,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-24 21:42:53,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:53,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-24 21:42:53,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2023-11-24 21:42:53,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:53,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:53,251 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 65 transitions. [2023-11-24 21:42:53,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 104 flow [2023-11-24 21:42:53,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:42:53,257 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-24 21:42:53,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-24 21:42:53,264 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-24 21:42:53,264 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-24 21:42:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-11-24 21:42:53,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:53,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:42:53,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:42:53,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:53,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash 8571, now seen corresponding path program 1 times [2023-11-24 21:42:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:53,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049029049] [2023-11-24 21:42:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049029049] [2023-11-24 21:42:53,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049029049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:53,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778195813] [2023-11-24 21:42:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:53,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:53,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:53,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:53,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:53,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:42:53,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-24 21:42:53,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:53,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:42:53,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:53,529 INFO L124 PetriNetUnfolderBase]: 48/118 cut-off events. [2023-11-24 21:42:53,530 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-11-24 21:42:53,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 118 events. 48/118 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 367 event pairs, 31 based on Foata normal form. 13/114 useless extension candidates. Maximal degree in co-relation 207. Up to 86 conditions per place. [2023-11-24 21:42:53,532 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-24 21:42:53,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 90 flow [2023-11-24 21:42:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-24 21:42:53,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-24 21:42:53,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-24 21:42:53,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-24 21:42:53,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:53,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-24 21:42:53,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-11-24 21:42:53,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:53,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:53,539 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 68 transitions. [2023-11-24 21:42:53,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 90 flow [2023-11-24 21:42:53,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:53,541 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-24 21:42:53,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-24 21:42:53,542 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-24 21:42:53,542 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-24 21:42:53,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-24 21:42:53,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:53,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:42:53,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:42:53,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:53,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 255533216, now seen corresponding path program 1 times [2023-11-24 21:42:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058140954] [2023-11-24 21:42:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:53,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:53,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058140954] [2023-11-24 21:42:53,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058140954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:53,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:53,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951664660] [2023-11-24 21:42:53,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:53,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:53,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:53,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-24 21:42:53,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-24 21:42:53,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:53,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-24 21:42:53,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:53,741 INFO L124 PetriNetUnfolderBase]: 55/122 cut-off events. [2023-11-24 21:42:53,741 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:42:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 122 events. 55/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 351 event pairs, 36 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 225. Up to 100 conditions per place. [2023-11-24 21:42:53,743 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-24 21:42:53,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 91 flow [2023-11-24 21:42:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-24 21:42:53,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-24 21:42:53,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-24 21:42:53,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-24 21:42:53,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:53,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-24 21:42:53,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-24 21:42:53,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:53,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:53,749 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 64 transitions. [2023-11-24 21:42:53,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 91 flow [2023-11-24 21:42:53,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:53,751 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-24 21:42:53,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, 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=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-24 21:42:53,752 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-24 21:42:53,752 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-24 21:42:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-24 21:42:53,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:53,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:42:53,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:42:53,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:53,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash 255533217, now seen corresponding path program 1 times [2023-11-24 21:42:53,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:53,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691799108] [2023-11-24 21:42:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:53,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:53,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691799108] [2023-11-24 21:42:53,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691799108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:53,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:53,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:42:53,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706694206] [2023-11-24 21:42:53,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:53,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:53,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:53,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:42:53,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-24 21:42:53,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:53,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:42:53,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:53,999 INFO L124 PetriNetUnfolderBase]: 48/108 cut-off events. [2023-11-24 21:42:53,999 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-11-24 21:42:54,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 108 events. 48/108 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 305 event pairs, 31 based on Foata normal form. 6/107 useless extension candidates. Maximal degree in co-relation 197. Up to 86 conditions per place. [2023-11-24 21:42:54,004 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-24 21:42:54,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 84 flow [2023-11-24 21:42:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:42:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:42:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-24 21:42:54,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-24 21:42:54,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-24 21:42:54,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-24 21:42:54,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:54,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-24 21:42:54,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-11-24 21:42:54,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:54,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-24 21:42:54,017 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 68 transitions. [2023-11-24 21:42:54,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 84 flow [2023-11-24 21:42:54,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:54,021 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-24 21:42:54,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-24 21:42:54,023 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-24 21:42:54,024 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-24 21:42:54,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-24 21:42:54,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:54,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:54,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:42:54,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:54,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1439962673, now seen corresponding path program 1 times [2023-11-24 21:42:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:54,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975848148] [2023-11-24 21:42:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:54,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975848148] [2023-11-24 21:42:54,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975848148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:54,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:54,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:42:54,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196320656] [2023-11-24 21:42:54,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:54,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:42:54,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:42:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:42:54,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-24 21:42:54,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-11-24 21:42:54,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:54,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-24 21:42:54,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:54,229 INFO L124 PetriNetUnfolderBase]: 70/154 cut-off events. [2023-11-24 21:42:54,229 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-11-24 21:42:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 154 events. 70/154 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 491 event pairs, 33 based on Foata normal form. 8/155 useless extension candidates. Maximal degree in co-relation 283. Up to 86 conditions per place. [2023-11-24 21:42:54,231 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 20 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-24 21:42:54,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 118 flow [2023-11-24 21:42:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:42:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:42:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-24 21:42:54,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-24 21:42:54,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-24 21:42:54,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-24 21:42:54,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:54,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-24 21:42:54,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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) [2023-11-24 21:42:54,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-24 21:42:54,236 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-24 21:42:54,237 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 4 states and 100 transitions. [2023-11-24 21:42:54,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 118 flow [2023-11-24 21:42:54,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:42:54,239 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 68 flow [2023-11-24 21:42:54,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-24 21:42:54,240 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-24 21:42:54,240 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 68 flow [2023-11-24 21:42:54,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-11-24 21:42:54,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:54,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:54,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:42:54,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:54,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 665411574, now seen corresponding path program 1 times [2023-11-24 21:42:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700270374] [2023-11-24 21:42:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:54,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:54,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700270374] [2023-11-24 21:42:54,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700270374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:54,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:54,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:42:54,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078044508] [2023-11-24 21:42:54,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:42:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:42:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:42:54,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-24 21:42:54,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2023-11-24 21:42:54,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:54,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-24 21:42:54,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:54,425 INFO L124 PetriNetUnfolderBase]: 89/196 cut-off events. [2023-11-24 21:42:54,425 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-24 21:42:54,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 196 events. 89/196 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 711 event pairs, 49 based on Foata normal form. 13/204 useless extension candidates. Maximal degree in co-relation 407. Up to 124 conditions per place. [2023-11-24 21:42:54,427 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-24 21:42:54,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 143 flow [2023-11-24 21:42:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:42:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:42:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-24 21:42:54,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-24 21:42:54,429 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-24 21:42:54,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-24 21:42:54,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:54,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-24 21:42:54,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2023-11-24 21:42:54,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-24 21:42:54,431 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-24 21:42:54,431 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 68 flow. Second operand 4 states and 99 transitions. [2023-11-24 21:42:54,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 143 flow [2023-11-24 21:42:54,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:42:54,434 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-24 21:42:54,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-24 21:42:54,435 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-24 21:42:54,435 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-24 21:42:54,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2023-11-24 21:42:54,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:54,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:42:54,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:54,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 293102942, now seen corresponding path program 1 times [2023-11-24 21:42:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:54,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197441748] [2023-11-24 21:42:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:54,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:42:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197441748] [2023-11-24 21:42:54,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197441748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:42:54,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558380831] [2023-11-24 21:42:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:42:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:54,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:42:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:42:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:54,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:42:54,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:42:54,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:55,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558380831] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:42:55,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:42:55,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2023-11-24 21:42:55,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150783303] [2023-11-24 21:42:55,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:42:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:42:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:42:55,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-24 21:42:55,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2023-11-24 21:42:55,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:55,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-24 21:42:55,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:55,387 INFO L124 PetriNetUnfolderBase]: 153/330 cut-off events. [2023-11-24 21:42:55,388 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-24 21:42:55,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 330 events. 153/330 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1336 event pairs, 23 based on Foata normal form. 1/330 useless extension candidates. Maximal degree in co-relation 784. Up to 97 conditions per place. [2023-11-24 21:42:55,393 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 35 selfloop transitions, 5 changer transitions 3/51 dead transitions. [2023-11-24 21:42:55,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 252 flow [2023-11-24 21:42:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:42:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:42:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-24 21:42:55,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7986111111111112 [2023-11-24 21:42:55,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-24 21:42:55,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-24 21:42:55,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:55,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-24 21:42:55,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2023-11-24 21:42:55,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-24 21:42:55,404 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-24 21:42:55,404 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 4 states and 115 transitions. [2023-11-24 21:42:55,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 252 flow [2023-11-24 21:42:55,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:42:55,409 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 112 flow [2023-11-24 21:42:55,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-24 21:42:55,410 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-24 21:42:55,410 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 112 flow [2023-11-24 21:42:55,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2023-11-24 21:42:55,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:55,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:55,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:42:55,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:55,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:55,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1621803826, now seen corresponding path program 2 times [2023-11-24 21:42:55,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:55,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908074055] [2023-11-24 21:42:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:42:55,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908074055] [2023-11-24 21:42:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908074055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:42:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786061969] [2023-11-24 21:42:55,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:42:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:42:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:55,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:42:55,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:42:55,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:42:55,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:42:55,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:42:55,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:42:55,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:42:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786061969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:56,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:42:56,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-24 21:42:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977359875] [2023-11-24 21:42:56,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:56,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:42:56,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:42:56,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:42:56,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 21:42:56,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 112 flow. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2023-11-24 21:42:56,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:56,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 21:42:56,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:56,421 INFO L124 PetriNetUnfolderBase]: 286/565 cut-off events. [2023-11-24 21:42:56,422 INFO L125 PetriNetUnfolderBase]: For 370/374 co-relation queries the response was YES. [2023-11-24 21:42:56,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 565 events. 286/565 cut-off events. For 370/374 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2471 event pairs, 42 based on Foata normal form. 20/584 useless extension candidates. Maximal degree in co-relation 1504. Up to 242 conditions per place. [2023-11-24 21:42:56,427 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 40 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2023-11-24 21:42:56,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 349 flow [2023-11-24 21:42:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:42:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:42:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2023-11-24 21:42:56,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-24 21:42:56,429 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2023-11-24 21:42:56,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2023-11-24 21:42:56,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:56,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2023-11-24 21:42:56,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 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) [2023-11-24 21:42:56,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 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) [2023-11-24 21:42:56,432 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 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) [2023-11-24 21:42:56,432 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 112 flow. Second operand 6 states and 148 transitions. [2023-11-24 21:42:56,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 349 flow [2023-11-24 21:42:56,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:42:56,438 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 233 flow [2023-11-24 21:42:56,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-24 21:42:56,441 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-24 21:42:56,441 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 233 flow [2023-11-24 21:42:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2023-11-24 21:42:56,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:56,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:56,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:56,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:42:56,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:56,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1759011537, now seen corresponding path program 3 times [2023-11-24 21:42:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:56,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907187421] [2023-11-24 21:42:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907187421] [2023-11-24 21:42:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907187421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:42:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560408278] [2023-11-24 21:42:56,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:42:56,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:42:56,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:56,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:42:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:42:56,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:42:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:42:56,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:42:56,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:57,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560408278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:57,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:42:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-24 21:42:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168703605] [2023-11-24 21:42:57,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:42:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:42:57,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:42:57,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:42:57,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 233 flow. Second operand has 19 states, 19 states have (on average 19.789473684210527) internal successors, (376), 19 states have internal predecessors, (376), 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) [2023-11-24 21:42:57,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:57,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:42:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:58,585 INFO L124 PetriNetUnfolderBase]: 643/1175 cut-off events. [2023-11-24 21:42:58,585 INFO L125 PetriNetUnfolderBase]: For 1936/1938 co-relation queries the response was YES. [2023-11-24 21:42:58,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 1175 events. 643/1175 cut-off events. For 1936/1938 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5625 event pairs, 20 based on Foata normal form. 39/1214 useless extension candidates. Maximal degree in co-relation 3816. Up to 229 conditions per place. [2023-11-24 21:42:58,600 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 140 selfloop transitions, 81 changer transitions 22/249 dead transitions. [2023-11-24 21:42:58,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 249 transitions, 1719 flow [2023-11-24 21:42:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-24 21:42:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-24 21:42:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 876 transitions. [2023-11-24 21:42:58,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2023-11-24 21:42:58,606 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 876 transitions. [2023-11-24 21:42:58,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 876 transitions. [2023-11-24 21:42:58,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:58,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 876 transitions. [2023-11-24 21:42:58,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 22.46153846153846) internal successors, (876), 39 states have internal predecessors, (876), 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) [2023-11-24 21:42:58,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 36.0) internal successors, (1440), 40 states have internal predecessors, (1440), 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) [2023-11-24 21:42:58,616 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 36.0) internal successors, (1440), 40 states have internal predecessors, (1440), 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) [2023-11-24 21:42:58,616 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 233 flow. Second operand 39 states and 876 transitions. [2023-11-24 21:42:58,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 249 transitions, 1719 flow [2023-11-24 21:42:58,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 249 transitions, 1711 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-24 21:42:58,634 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 980 flow [2023-11-24 21:42:58,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=980, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-11-24 21:42:58,635 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-24 21:42:58,635 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 980 flow [2023-11-24 21:42:58,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.789473684210527) internal successors, (376), 19 states have internal predecessors, (376), 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) [2023-11-24 21:42:58,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:58,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:58,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:58,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 21:42:58,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:42:58,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash -63672689, now seen corresponding path program 4 times [2023-11-24 21:42:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367131558] [2023-11-24 21:42:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367131558] [2023-11-24 21:42:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367131558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:42:59,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711583403] [2023-11-24 21:42:59,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:42:59,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:42:59,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:59,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:42:59,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:42:59,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:42:59,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:42:59,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:42:59,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:42:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711583403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:59,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:42:59,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-24 21:42:59,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828850973] [2023-11-24 21:42:59,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:59,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:42:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:42:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:42:59,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:42:59,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 980 flow. Second operand has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 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) [2023-11-24 21:42:59,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:59,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:42:59,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:00,493 INFO L124 PetriNetUnfolderBase]: 1021/1843 cut-off events. [2023-11-24 21:43:00,493 INFO L125 PetriNetUnfolderBase]: For 18531/18531 co-relation queries the response was YES. [2023-11-24 21:43:00,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9565 conditions, 1843 events. 1021/1843 cut-off events. For 18531/18531 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9714 event pairs, 35 based on Foata normal form. 87/1930 useless extension candidates. Maximal degree in co-relation 9523. Up to 328 conditions per place. [2023-11-24 21:43:00,530 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 147 selfloop transitions, 158 changer transitions 3/314 dead transitions. [2023-11-24 21:43:00,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 314 transitions, 3432 flow [2023-11-24 21:43:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 21:43:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-24 21:43:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 641 transitions. [2023-11-24 21:43:00,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359126984126984 [2023-11-24 21:43:00,535 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 641 transitions. [2023-11-24 21:43:00,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 641 transitions. [2023-11-24 21:43:00,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:00,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 641 transitions. [2023-11-24 21:43:00,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 22.892857142857142) internal successors, (641), 28 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:00,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 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) [2023-11-24 21:43:00,544 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 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) [2023-11-24 21:43:00,544 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 980 flow. Second operand 28 states and 641 transitions. [2023-11-24 21:43:00,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 314 transitions, 3432 flow [2023-11-24 21:43:00,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 314 transitions, 3209 flow, removed 105 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:00,609 INFO L231 Difference]: Finished difference. Result has 144 places, 201 transitions, 2430 flow [2023-11-24 21:43:00,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2430, PETRI_PLACES=144, PETRI_TRANSITIONS=201} [2023-11-24 21:43:00,610 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2023-11-24 21:43:00,610 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 201 transitions, 2430 flow [2023-11-24 21:43:00,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 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) [2023-11-24 21:43:00,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:00,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:00,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 21:43:00,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:43:00,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:43:00,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash -90697453, now seen corresponding path program 5 times [2023-11-24 21:43:00,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:00,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098992977] [2023-11-24 21:43:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:00,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:00,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098992977] [2023-11-24 21:43:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098992977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279662182] [2023-11-24 21:43:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:43:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:00,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:00,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:43:01,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-24 21:43:01,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:01,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:43:01,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:01,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279662182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:01,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:01,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-24 21:43:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938256319] [2023-11-24 21:43:01,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:01,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:43:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:43:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:43:01,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:43:01,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 201 transitions, 2430 flow. Second operand has 18 states, 18 states have (on average 19.11111111111111) internal successors, (344), 18 states have internal predecessors, (344), 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) [2023-11-24 21:43:01,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:01,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:43:01,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:02,760 INFO L124 PetriNetUnfolderBase]: 1671/2932 cut-off events. [2023-11-24 21:43:02,760 INFO L125 PetriNetUnfolderBase]: For 52803/52803 co-relation queries the response was YES. [2023-11-24 21:43:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19779 conditions, 2932 events. 1671/2932 cut-off events. For 52803/52803 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16548 event pairs, 27 based on Foata normal form. 28/2960 useless extension candidates. Maximal degree in co-relation 19719. Up to 514 conditions per place. [2023-11-24 21:43:02,818 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 205 selfloop transitions, 252 changer transitions 0/463 dead transitions. [2023-11-24 21:43:02,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 463 transitions, 6441 flow [2023-11-24 21:43:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-24 21:43:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-24 21:43:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 665 transitions. [2023-11-24 21:43:02,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369731800766284 [2023-11-24 21:43:02,918 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 665 transitions. [2023-11-24 21:43:02,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 665 transitions. [2023-11-24 21:43:02,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:02,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 665 transitions. [2023-11-24 21:43:02,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 22.93103448275862) internal successors, (665), 29 states have internal predecessors, (665), 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) [2023-11-24 21:43:02,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 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) [2023-11-24 21:43:02,924 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 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) [2023-11-24 21:43:02,924 INFO L175 Difference]: Start difference. First operand has 144 places, 201 transitions, 2430 flow. Second operand 29 states and 665 transitions. [2023-11-24 21:43:02,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 463 transitions, 6441 flow [2023-11-24 21:43:03,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 463 transitions, 6236 flow, removed 96 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:03,305 INFO L231 Difference]: Finished difference. Result has 183 places, 325 transitions, 5001 flow [2023-11-24 21:43:03,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5001, PETRI_PLACES=183, PETRI_TRANSITIONS=325} [2023-11-24 21:43:03,306 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 145 predicate places. [2023-11-24 21:43:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 325 transitions, 5001 flow [2023-11-24 21:43:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.11111111111111) internal successors, (344), 18 states have internal predecessors, (344), 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) [2023-11-24 21:43:03,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:03,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:03,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:03,513 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:43:03,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1783732873, now seen corresponding path program 6 times [2023-11-24 21:43:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:03,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728698978] [2023-11-24 21:43:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:03,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:03,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728698978] [2023-11-24 21:43:03,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728698978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:03,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840645682] [2023-11-24 21:43:03,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:43:03,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:03,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:03,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:03,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:43:03,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:43:03,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:03,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:43:03,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:03,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840645682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:04,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-24 21:43:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616606827] [2023-11-24 21:43:04,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:43:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:43:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:43:04,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:43:04,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 325 transitions, 5001 flow. Second operand has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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) [2023-11-24 21:43:04,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:04,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:43:04,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:07,025 INFO L124 PetriNetUnfolderBase]: 2193/3838 cut-off events. [2023-11-24 21:43:07,026 INFO L125 PetriNetUnfolderBase]: For 103153/103155 co-relation queries the response was YES. [2023-11-24 21:43:07,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29308 conditions, 3838 events. 2193/3838 cut-off events. For 103153/103155 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22414 event pairs, 34 based on Foata normal form. 106/3944 useless extension candidates. Maximal degree in co-relation 29233. Up to 678 conditions per place. [2023-11-24 21:43:07,123 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 215 selfloop transitions, 442 changer transitions 4/667 dead transitions. [2023-11-24 21:43:07,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 667 transitions, 11121 flow [2023-11-24 21:43:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-24 21:43:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-24 21:43:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1091 transitions. [2023-11-24 21:43:07,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6184807256235828 [2023-11-24 21:43:07,131 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 1091 transitions. [2023-11-24 21:43:07,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 1091 transitions. [2023-11-24 21:43:07,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:07,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 1091 transitions. [2023-11-24 21:43:07,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 22.26530612244898) internal successors, (1091), 49 states have internal predecessors, (1091), 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) [2023-11-24 21:43:07,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 36.0) internal successors, (1800), 50 states have internal predecessors, (1800), 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) [2023-11-24 21:43:07,145 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 36.0) internal successors, (1800), 50 states have internal predecessors, (1800), 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) [2023-11-24 21:43:07,145 INFO L175 Difference]: Start difference. First operand has 183 places, 325 transitions, 5001 flow. Second operand 49 states and 1091 transitions. [2023-11-24 21:43:07,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 667 transitions, 11121 flow [2023-11-24 21:43:07,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 667 transitions, 10216 flow, removed 421 selfloop flow, removed 9 redundant places. [2023-11-24 21:43:07,838 INFO L231 Difference]: Finished difference. Result has 253 places, 517 transitions, 9033 flow [2023-11-24 21:43:07,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=4538, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9033, PETRI_PLACES=253, PETRI_TRANSITIONS=517} [2023-11-24 21:43:07,839 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 215 predicate places. [2023-11-24 21:43:07,840 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 517 transitions, 9033 flow [2023-11-24 21:43:07,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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) [2023-11-24 21:43:07,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:07,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:07,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:08,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:43:08,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:43:08,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash -217938475, now seen corresponding path program 7 times [2023-11-24 21:43:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:08,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209189543] [2023-11-24 21:43:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:08,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:08,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209189543] [2023-11-24 21:43:08,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209189543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660176250] [2023-11-24 21:43:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:43:08,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:08,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:08,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:08,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:43:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:08,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:43:08,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:08,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660176250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:08,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:08,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-24 21:43:08,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707126319] [2023-11-24 21:43:08,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:08,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:43:08,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:08,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:43:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:43:08,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:43:08,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 517 transitions, 9033 flow. Second operand has 23 states, 23 states have (on average 19.347826086956523) internal successors, (445), 23 states have internal predecessors, (445), 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) [2023-11-24 21:43:08,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:08,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:43:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:12,654 INFO L124 PetriNetUnfolderBase]: 3369/5905 cut-off events. [2023-11-24 21:43:12,654 INFO L125 PetriNetUnfolderBase]: For 180200/180200 co-relation queries the response was YES. [2023-11-24 21:43:12,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52045 conditions, 5905 events. 3369/5905 cut-off events. For 180200/180200 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37459 event pairs, 40 based on Foata normal form. 99/6004 useless extension candidates. Maximal degree in co-relation 51940. Up to 1094 conditions per place. [2023-11-24 21:43:12,800 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 339 selfloop transitions, 715 changer transitions 7/1067 dead transitions. [2023-11-24 21:43:12,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1067 transitions, 20674 flow [2023-11-24 21:43:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-24 21:43:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-24 21:43:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1020 transitions. [2023-11-24 21:43:12,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2023-11-24 21:43:12,805 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1020 transitions. [2023-11-24 21:43:12,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1020 transitions. [2023-11-24 21:43:12,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:12,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1020 transitions. [2023-11-24 21:43:12,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 22.17391304347826) internal successors, (1020), 46 states have internal predecessors, (1020), 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) [2023-11-24 21:43:12,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 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) [2023-11-24 21:43:12,813 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 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) [2023-11-24 21:43:12,814 INFO L175 Difference]: Start difference. First operand has 253 places, 517 transitions, 9033 flow. Second operand 46 states and 1020 transitions. [2023-11-24 21:43:12,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1067 transitions, 20674 flow [2023-11-24 21:43:14,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1067 transitions, 19734 flow, removed 392 selfloop flow, removed 13 redundant places. [2023-11-24 21:43:14,861 INFO L231 Difference]: Finished difference. Result has 305 places, 869 transitions, 17374 flow [2023-11-24 21:43:14,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=17374, PETRI_PLACES=305, PETRI_TRANSITIONS=869} [2023-11-24 21:43:14,862 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 267 predicate places. [2023-11-24 21:43:14,862 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 869 transitions, 17374 flow [2023-11-24 21:43:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 19.347826086956523) internal successors, (445), 23 states have internal predecessors, (445), 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) [2023-11-24 21:43:14,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:14,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:14,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:15,064 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:43:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1280313235, now seen corresponding path program 8 times [2023-11-24 21:43:15,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:15,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901480858] [2023-11-24 21:43:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901480858] [2023-11-24 21:43:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901480858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970130516] [2023-11-24 21:43:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:15,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:15,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:43:15,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:43:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:15,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:43:15,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:15,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970130516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:15,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-24 21:43:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523612978] [2023-11-24 21:43:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:15,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:43:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:43:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:43:15,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:43:15,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 869 transitions, 17374 flow. Second operand has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 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) [2023-11-24 21:43:15,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:15,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:43:15,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:20,060 INFO L124 PetriNetUnfolderBase]: 3844/6640 cut-off events. [2023-11-24 21:43:20,061 INFO L125 PetriNetUnfolderBase]: For 270123/270123 co-relation queries the response was YES. [2023-11-24 21:43:20,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65703 conditions, 6640 events. 3844/6640 cut-off events. For 270123/270123 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42352 event pairs, 106 based on Foata normal form. 16/6656 useless extension candidates. Maximal degree in co-relation 65583. Up to 1418 conditions per place. [2023-11-24 21:43:20,190 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 499 selfloop transitions, 623 changer transitions 6/1134 dead transitions. [2023-11-24 21:43:20,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1134 transitions, 24910 flow [2023-11-24 21:43:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-24 21:43:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-24 21:43:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 770 transitions. [2023-11-24 21:43:20,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-24 21:43:20,195 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 770 transitions. [2023-11-24 21:43:20,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 770 transitions. [2023-11-24 21:43:20,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:20,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 770 transitions. [2023-11-24 21:43:20,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 22.0) internal successors, (770), 35 states have internal predecessors, (770), 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) [2023-11-24 21:43:20,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 36.0) internal successors, (1296), 36 states have internal predecessors, (1296), 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) [2023-11-24 21:43:20,335 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 36.0) internal successors, (1296), 36 states have internal predecessors, (1296), 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) [2023-11-24 21:43:20,335 INFO L175 Difference]: Start difference. First operand has 305 places, 869 transitions, 17374 flow. Second operand 35 states and 770 transitions. [2023-11-24 21:43:20,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1134 transitions, 24910 flow [2023-11-24 21:43:23,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1134 transitions, 24258 flow, removed 298 selfloop flow, removed 11 redundant places. [2023-11-24 21:43:23,646 INFO L231 Difference]: Finished difference. Result has 342 places, 988 transitions, 21119 flow [2023-11-24 21:43:23,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=16950, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21119, PETRI_PLACES=342, PETRI_TRANSITIONS=988} [2023-11-24 21:43:23,648 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 304 predicate places. [2023-11-24 21:43:23,648 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 988 transitions, 21119 flow [2023-11-24 21:43:23,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.238095238095237) internal successors, (404), 21 states have internal predecessors, (404), 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) [2023-11-24 21:43:23,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:23,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:23,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-24 21:43:23,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:43:23,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:43:23,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash -202069929, now seen corresponding path program 9 times [2023-11-24 21:43:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:23,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499120254] [2023-11-24 21:43:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499120254] [2023-11-24 21:43:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499120254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746391949] [2023-11-24 21:43:24,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:43:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:24,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:24,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:43:24,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:43:24,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:24,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:43:24,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746391949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:24,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:24,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-24 21:43:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624647378] [2023-11-24 21:43:24,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:43:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:43:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:43:24,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:43:24,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 988 transitions, 21119 flow. Second operand has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 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) [2023-11-24 21:43:24,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:24,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:43:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:29,780 INFO L124 PetriNetUnfolderBase]: 4296/7479 cut-off events. [2023-11-24 21:43:29,780 INFO L125 PetriNetUnfolderBase]: For 358682/358682 co-relation queries the response was YES. [2023-11-24 21:43:29,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78279 conditions, 7479 events. 4296/7479 cut-off events. For 358682/358682 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 49187 event pairs, 98 based on Foata normal form. 103/7582 useless extension candidates. Maximal degree in co-relation 78145. Up to 1345 conditions per place. [2023-11-24 21:43:29,920 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 309 selfloop transitions, 999 changer transitions 3/1317 dead transitions. [2023-11-24 21:43:29,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1317 transitions, 30427 flow [2023-11-24 21:43:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-24 21:43:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-24 21:43:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1023 transitions. [2023-11-24 21:43:29,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177536231884058 [2023-11-24 21:43:29,924 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1023 transitions. [2023-11-24 21:43:29,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1023 transitions. [2023-11-24 21:43:29,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:29,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1023 transitions. [2023-11-24 21:43:29,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 22.23913043478261) internal successors, (1023), 46 states have internal predecessors, (1023), 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) [2023-11-24 21:43:29,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 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) [2023-11-24 21:43:29,933 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 36.0) internal successors, (1692), 47 states have internal predecessors, (1692), 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) [2023-11-24 21:43:29,933 INFO L175 Difference]: Start difference. First operand has 342 places, 988 transitions, 21119 flow. Second operand 46 states and 1023 transitions. [2023-11-24 21:43:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1317 transitions, 30427 flow [2023-11-24 21:43:34,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1317 transitions, 29994 flow, removed 175 selfloop flow, removed 11 redundant places. [2023-11-24 21:43:34,702 INFO L231 Difference]: Finished difference. Result has 392 places, 1177 transitions, 28872 flow [2023-11-24 21:43:34,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=20668, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=28872, PETRI_PLACES=392, PETRI_TRANSITIONS=1177} [2023-11-24 21:43:34,703 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 354 predicate places. [2023-11-24 21:43:34,703 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1177 transitions, 28872 flow [2023-11-24 21:43:34,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 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) [2023-11-24 21:43:34,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:34,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:34,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:34,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:34,905 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:43:34,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash -735050357, now seen corresponding path program 10 times [2023-11-24 21:43:34,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:34,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423295915] [2023-11-24 21:43:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:35,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:35,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423295915] [2023-11-24 21:43:35,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423295915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:35,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718195487] [2023-11-24 21:43:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:43:35,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:35,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:35,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:35,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040f5e6-c903-49ac-809f-1a44871718d2/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:43:35,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:43:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:35,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:43:35,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:35,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:35,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718195487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:35,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:35,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2023-11-24 21:43:35,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806059862] [2023-11-24 21:43:35,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:35,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:43:35,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:43:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:43:35,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 21:43:35,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1177 transitions, 28872 flow. Second operand has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 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) [2023-11-24 21:43:35,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:35,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 21:43:35,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:40,340 INFO L124 PetriNetUnfolderBase]: 4296/7470 cut-off events. [2023-11-24 21:43:40,340 INFO L125 PetriNetUnfolderBase]: For 442865/442865 co-relation queries the response was YES. [2023-11-24 21:43:40,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86311 conditions, 7470 events. 4296/7470 cut-off events. For 442865/442865 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 49056 event pairs, 198 based on Foata normal form. 18/7488 useless extension candidates. Maximal degree in co-relation 86159. Up to 1633 conditions per place. [2023-11-24 21:43:40,517 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 644 selfloop transitions, 601 changer transitions 4/1255 dead transitions. [2023-11-24 21:43:40,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1255 transitions, 32954 flow [2023-11-24 21:43:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 21:43:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-24 21:43:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 419 transitions. [2023-11-24 21:43:40,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466049382716049 [2023-11-24 21:43:40,520 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 419 transitions. [2023-11-24 21:43:40,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 419 transitions. [2023-11-24 21:43:40,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:40,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 419 transitions. [2023-11-24 21:43:40,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.27777777777778) internal successors, (419), 18 states have internal predecessors, (419), 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) [2023-11-24 21:43:40,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 36.0) internal successors, (684), 19 states have internal predecessors, (684), 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) [2023-11-24 21:43:40,525 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 36.0) internal successors, (684), 19 states have internal predecessors, (684), 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) [2023-11-24 21:43:40,527 INFO L175 Difference]: Start difference. First operand has 392 places, 1177 transitions, 28872 flow. Second operand 18 states and 419 transitions. [2023-11-24 21:43:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1255 transitions, 32954 flow