./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_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme --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 [2023-11-26 11:53:15,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:15,719 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:53:15,725 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:15,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:15,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:15,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:15,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:15,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:15,754 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:15,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:15,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:15,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:15,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:15,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:15,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:15,759 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:15,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:15,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:15,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:15,761 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:53:15,762 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:53:15,762 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:53:15,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:15,763 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:53:15,764 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:53:15,765 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:15,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:15,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:15,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:15,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:15,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:15,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:15,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:15,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:15,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:15,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:15,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:15,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:15,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:15,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:15,771 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_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-26 11:53:16,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:16,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:16,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:16,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:16,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:16,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-26 11:53:19,334 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:19,612 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:19,612 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-26 11:53:19,623 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/data/fac2452e3/c21b4e9354444e589213355ffc27109d/FLAG4f0c954a4 [2023-11-26 11:53:19,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/data/fac2452e3/c21b4e9354444e589213355ffc27109d [2023-11-26 11:53:19,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:19,655 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:19,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:19,658 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:19,664 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:19,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:19,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cca9797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19, skipping insertion in model container [2023-11-26 11:53:19,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:19,697 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:19,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:19,928 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:19,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:19,957 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:53:19,958 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:53:19,966 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:19,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19 WrapperNode [2023-11-26 11:53:19,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:19,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:19,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:19,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:19,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:19,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,005 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-26 11:53:20,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:20,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:20,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:20,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:20,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,038 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]. [2023-11-26 11:53:20,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:20,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:20,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:20,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:20,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (1/1) ... [2023-11-26 11:53:20,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:20,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:20,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:53:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:53:20,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:53:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:53:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:53:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:53:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:53:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:53:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:53:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:53:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:20,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:53:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:53:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:53:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:53:20,165 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:53:20,315 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:20,319 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:20,608 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:20,765 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:20,765 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:53:20,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:20 BoogieIcfgContainer [2023-11-26 11:53:20,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:20,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:20,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:20,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:20,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:19" (1/3) ... [2023-11-26 11:53:20,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd20078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:20, skipping insertion in model container [2023-11-26 11:53:20,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:19" (2/3) ... [2023-11-26 11:53:20,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd20078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:20, skipping insertion in model container [2023-11-26 11:53:20,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:20" (3/3) ... [2023-11-26 11:53:20,776 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-26 11:53:20,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:20,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-26 11:53:20,796 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:53:20,850 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:53:20,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-26 11:53:20,922 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-26 11:53:20,922 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:53:20,926 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. [2023-11-26 11:53:20,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-26 11:53:20,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-26 11:53:20,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:20,950 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;@791bc55d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:20,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-26 11:53:20,954 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:53:20,954 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 11:53:20,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:53:20,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:20,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:53:20,956 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)] === [2023-11-26 11:53:20,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:20,962 INFO L85 PathProgramCache]: Analyzing trace with hash 8570, now seen corresponding path program 1 times [2023-11-26 11:53:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:20,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318824803] [2023-11-26 11:53:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318824803] [2023-11-26 11:53:21,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318824803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:21,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:21,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:21,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085751480] [2023-11-26 11:53:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:21,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:21,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-26 11:53:21,411 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) [2023-11-26 11:53:21,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:21,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-26 11:53:21,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:21,518 INFO L124 PetriNetUnfolderBase]: 72/159 cut-off events. [2023-11-26 11:53:21,518 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 11:53:21,520 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. [2023-11-26 11:53:21,524 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-26 11:53:21,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 104 flow [2023-11-26 11:53:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-26 11:53:21,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2023-11-26 11:53:21,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-26 11:53:21,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-26 11:53:21,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:21,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-26 11:53:21,545 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) [2023-11-26 11:53:21,552 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) [2023-11-26 11:53:21,554 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) [2023-11-26 11:53:21,557 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 65 transitions. [2023-11-26 11:53:21,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 104 flow [2023-11-26 11:53:21,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:53:21,565 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-26 11:53:21,567 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} [2023-11-26 11:53:21,572 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-26 11:53:21,572 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-26 11:53:21,573 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) [2023-11-26 11:53:21,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:21,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:53:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:53:21,575 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)] === [2023-11-26 11:53:21,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash 8571, now seen corresponding path program 1 times [2023-11-26 11:53:21,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352034733] [2023-11-26 11:53:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:21,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:21,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:21,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352034733] [2023-11-26 11:53:21,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352034733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:21,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927225604] [2023-11-26 11:53:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:21,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:21,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:21,823 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) [2023-11-26 11:53:21,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:21,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:21,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:21,891 INFO L124 PetriNetUnfolderBase]: 48/118 cut-off events. [2023-11-26 11:53:21,891 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-11-26 11:53:21,894 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. [2023-11-26 11:53:21,895 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-26 11:53:21,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 90 flow [2023-11-26 11:53:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-26 11:53:21,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-26 11:53:21,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-26 11:53:21,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-26 11:53:21,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:21,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-26 11:53:21,901 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) [2023-11-26 11:53:21,902 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) [2023-11-26 11:53:21,902 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) [2023-11-26 11:53:21,903 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 68 transitions. [2023-11-26 11:53:21,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 90 flow [2023-11-26 11:53:21,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:21,905 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-26 11:53:21,905 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} [2023-11-26 11:53:21,906 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-26 11:53:21,906 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-26 11:53:21,907 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) [2023-11-26 11:53:21,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:21,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:53:21,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:53:21,908 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)] === [2023-11-26 11:53:21,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 255533216, now seen corresponding path program 1 times [2023-11-26 11:53:21,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:21,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987723819] [2023-11-26 11:53:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:21,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987723819] [2023-11-26 11:53:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987723819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:21,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:21,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:21,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093557839] [2023-11-26 11:53:21,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:21,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:21,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-26 11:53:21,993 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) [2023-11-26 11:53:21,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:21,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-26 11:53:21,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:22,042 INFO L124 PetriNetUnfolderBase]: 55/122 cut-off events. [2023-11-26 11:53:22,043 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:53:22,044 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. [2023-11-26 11:53:22,045 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-26 11:53:22,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 91 flow [2023-11-26 11:53:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-26 11:53:22,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-26 11:53:22,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-26 11:53:22,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-26 11:53:22,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:22,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-26 11:53:22,048 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) [2023-11-26 11:53:22,049 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) [2023-11-26 11:53:22,050 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) [2023-11-26 11:53:22,050 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 64 transitions. [2023-11-26 11:53:22,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 91 flow [2023-11-26 11:53:22,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:22,052 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-26 11:53:22,052 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} [2023-11-26 11:53:22,053 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-26 11:53:22,053 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-26 11:53:22,054 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) [2023-11-26 11:53:22,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:22,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:53:22,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:53:22,055 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)] === [2023-11-26 11:53:22,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:22,055 INFO L85 PathProgramCache]: Analyzing trace with hash 255533217, now seen corresponding path program 1 times [2023-11-26 11:53:22,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:22,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981787131] [2023-11-26 11:53:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:22,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981787131] [2023-11-26 11:53:22,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981787131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:22,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:22,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:53:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640685376] [2023-11-26 11:53:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:22,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:22,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:22,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:22,190 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) [2023-11-26 11:53:22,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:22,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:22,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:22,230 INFO L124 PetriNetUnfolderBase]: 48/108 cut-off events. [2023-11-26 11:53:22,231 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-11-26 11:53:22,244 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. [2023-11-26 11:53:22,245 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-26 11:53:22,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 84 flow [2023-11-26 11:53:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:53:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-26 11:53:22,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-26 11:53:22,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-26 11:53:22,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-26 11:53:22,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:22,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-26 11:53:22,251 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) [2023-11-26 11:53:22,251 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) [2023-11-26 11:53:22,252 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) [2023-11-26 11:53:22,252 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 68 transitions. [2023-11-26 11:53:22,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 84 flow [2023-11-26 11:53:22,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:22,254 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-26 11:53:22,254 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} [2023-11-26 11:53:22,255 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-26 11:53:22,255 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-26 11:53:22,255 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) [2023-11-26 11:53:22,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:22,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:22,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:53:22,256 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)] === [2023-11-26 11:53:22,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1439962673, now seen corresponding path program 1 times [2023-11-26 11:53:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784816052] [2023-11-26 11:53:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:22,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:22,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784816052] [2023-11-26 11:53:22,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784816052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:22,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:22,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:22,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838687208] [2023-11-26 11:53:22,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:22,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:22,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:22,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-26 11:53:22,353 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) [2023-11-26 11:53:22,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:22,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-26 11:53:22,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:22,421 INFO L124 PetriNetUnfolderBase]: 70/154 cut-off events. [2023-11-26 11:53:22,421 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-11-26 11:53:22,422 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. [2023-11-26 11:53:22,424 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 20 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-26 11:53:22,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 118 flow [2023-11-26 11:53:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-26 11:53:22,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-26 11:53:22,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-26 11:53:22,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-26 11:53:22,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:22,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-26 11:53:22,427 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) [2023-11-26 11:53:22,428 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) [2023-11-26 11:53:22,429 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) [2023-11-26 11:53:22,429 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 4 states and 100 transitions. [2023-11-26 11:53:22,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 118 flow [2023-11-26 11:53:22,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:22,431 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 68 flow [2023-11-26 11:53:22,431 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} [2023-11-26 11:53:22,432 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-26 11:53:22,432 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 68 flow [2023-11-26 11:53:22,432 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) [2023-11-26 11:53:22,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:22,433 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] [2023-11-26 11:53:22,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:53:22,433 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)] === [2023-11-26 11:53:22,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash 665411574, now seen corresponding path program 1 times [2023-11-26 11:53:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008007305] [2023-11-26 11:53:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:22,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008007305] [2023-11-26 11:53:22,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008007305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:22,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:22,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:22,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439638787] [2023-11-26 11:53:22,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:22,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:22,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:22,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:22,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-26 11:53:22,537 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) [2023-11-26 11:53:22,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:22,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-26 11:53:22,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:22,604 INFO L124 PetriNetUnfolderBase]: 89/196 cut-off events. [2023-11-26 11:53:22,605 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-26 11:53:22,606 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. [2023-11-26 11:53:22,608 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-26 11:53:22,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 143 flow [2023-11-26 11:53:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-26 11:53:22,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-26 11:53:22,610 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-26 11:53:22,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-26 11:53:22,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:22,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-26 11:53:22,611 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) [2023-11-26 11:53:22,612 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) [2023-11-26 11:53:22,613 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) [2023-11-26 11:53:22,613 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 68 flow. Second operand 4 states and 99 transitions. [2023-11-26 11:53:22,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 143 flow [2023-11-26 11:53:22,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:22,615 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-26 11:53:22,615 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} [2023-11-26 11:53:22,616 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-26 11:53:22,617 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-26 11:53:22,617 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) [2023-11-26 11:53:22,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:22,617 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] [2023-11-26 11:53:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:53:22,618 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)] === [2023-11-26 11:53:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 293102942, now seen corresponding path program 1 times [2023-11-26 11:53:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964596413] [2023-11-26 11:53:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:22,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:22,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964596413] [2023-11-26 11:53:22,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964596413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:22,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512497275] [2023-11-26 11:53:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:22,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:22,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:22,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:22,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:22,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:23,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512497275] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:23,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:23,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2023-11-26 11:53:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835946062] [2023-11-26 11:53:23,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:53:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:53:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:53:23,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-26 11:53:23,244 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) [2023-11-26 11:53:23,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:23,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-26 11:53:23,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:23,399 INFO L124 PetriNetUnfolderBase]: 153/330 cut-off events. [2023-11-26 11:53:23,400 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-26 11:53:23,404 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. [2023-11-26 11:53:23,406 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 35 selfloop transitions, 5 changer transitions 3/51 dead transitions. [2023-11-26 11:53:23,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 252 flow [2023-11-26 11:53:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-26 11:53:23,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7986111111111112 [2023-11-26 11:53:23,411 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-26 11:53:23,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-26 11:53:23,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:23,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-26 11:53:23,415 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) [2023-11-26 11:53:23,417 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) [2023-11-26 11:53:23,418 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) [2023-11-26 11:53:23,418 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 4 states and 115 transitions. [2023-11-26 11:53:23,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 252 flow [2023-11-26 11:53:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:23,421 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 112 flow [2023-11-26 11:53:23,421 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} [2023-11-26 11:53:23,422 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-26 11:53:23,423 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 112 flow [2023-11-26 11:53:23,423 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) [2023-11-26 11:53:23,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:23,423 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] [2023-11-26 11:53:23,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:23,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:23,630 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)] === [2023-11-26 11:53:23,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1621803826, now seen corresponding path program 2 times [2023-11-26 11:53:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:23,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295729445] [2023-11-26 11:53:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:23,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295729445] [2023-11-26 11:53:23,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295729445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630015434] [2023-11-26 11:53:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:53:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:23,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:23,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:23,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:53:23,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:23,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:53:23,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:24,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:24,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630015434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:24,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:24,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-26 11:53:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955876974] [2023-11-26 11:53:24,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:24,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:53:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:53:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:24,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-26 11:53:24,255 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) [2023-11-26 11:53:24,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:24,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-26 11:53:24,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:24,451 INFO L124 PetriNetUnfolderBase]: 286/565 cut-off events. [2023-11-26 11:53:24,451 INFO L125 PetriNetUnfolderBase]: For 370/374 co-relation queries the response was YES. [2023-11-26 11:53:24,453 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. [2023-11-26 11:53:24,457 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 40 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2023-11-26 11:53:24,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 349 flow [2023-11-26 11:53:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:53:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:53:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2023-11-26 11:53:24,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-26 11:53:24,460 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2023-11-26 11:53:24,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2023-11-26 11:53:24,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:24,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2023-11-26 11:53:24,461 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) [2023-11-26 11:53:24,463 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) [2023-11-26 11:53:24,463 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) [2023-11-26 11:53:24,464 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 112 flow. Second operand 6 states and 148 transitions. [2023-11-26 11:53:24,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 349 flow [2023-11-26 11:53:24,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:53:24,470 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 233 flow [2023-11-26 11:53:24,471 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} [2023-11-26 11:53:24,474 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-26 11:53:24,474 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 233 flow [2023-11-26 11:53:24,475 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) [2023-11-26 11:53:24,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:24,475 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] [2023-11-26 11:53:24,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:24,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:24,681 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)] === [2023-11-26 11:53:24,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1759011537, now seen corresponding path program 3 times [2023-11-26 11:53:24,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:24,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837811801] [2023-11-26 11:53:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:24,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:24,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:24,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837811801] [2023-11-26 11:53:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837811801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:24,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106627504] [2023-11-26 11:53:24,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:53:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:24,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:24,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:24,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:53:24,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:24,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:53:24,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:25,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:25,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106627504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:25,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-26 11:53:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66226615] [2023-11-26 11:53:25,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:25,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:53:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:53:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:53:25,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:25,386 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) [2023-11-26 11:53:25,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:25,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:26,494 INFO L124 PetriNetUnfolderBase]: 643/1175 cut-off events. [2023-11-26 11:53:26,494 INFO L125 PetriNetUnfolderBase]: For 1936/1938 co-relation queries the response was YES. [2023-11-26 11:53:26,499 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. [2023-11-26 11:53:26,507 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 140 selfloop transitions, 81 changer transitions 22/249 dead transitions. [2023-11-26 11:53:26,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 249 transitions, 1719 flow [2023-11-26 11:53:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-26 11:53:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-26 11:53:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 876 transitions. [2023-11-26 11:53:26,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2023-11-26 11:53:26,512 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 876 transitions. [2023-11-26 11:53:26,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 876 transitions. [2023-11-26 11:53:26,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:26,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 876 transitions. [2023-11-26 11:53:26,517 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) [2023-11-26 11:53:26,521 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) [2023-11-26 11:53:26,522 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) [2023-11-26 11:53:26,522 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 233 flow. Second operand 39 states and 876 transitions. [2023-11-26 11:53:26,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 249 transitions, 1719 flow [2023-11-26 11:53:26,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 249 transitions, 1711 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-26 11:53:26,537 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 980 flow [2023-11-26 11:53:26,537 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} [2023-11-26 11:53:26,538 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-26 11:53:26,538 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 980 flow [2023-11-26 11:53:26,539 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) [2023-11-26 11:53:26,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:26,539 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] [2023-11-26 11:53:26,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:26,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:26,745 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)] === [2023-11-26 11:53:26,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -63672689, now seen corresponding path program 4 times [2023-11-26 11:53:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764414388] [2023-11-26 11:53:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764414388] [2023-11-26 11:53:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764414388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719929510] [2023-11-26 11:53:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:53:26,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:27,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:53:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:27,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:27,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:27,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719929510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:27,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:27,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-26 11:53:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377440468] [2023-11-26 11:53:27,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:27,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:53:27,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:53:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:53:27,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:27,375 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) [2023-11-26 11:53:27,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:27,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:27,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:28,406 INFO L124 PetriNetUnfolderBase]: 1021/1843 cut-off events. [2023-11-26 11:53:28,406 INFO L125 PetriNetUnfolderBase]: For 18531/18531 co-relation queries the response was YES. [2023-11-26 11:53:28,420 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. [2023-11-26 11:53:28,438 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 147 selfloop transitions, 158 changer transitions 3/314 dead transitions. [2023-11-26 11:53:28,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 314 transitions, 3432 flow [2023-11-26 11:53:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:53:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 11:53:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 641 transitions. [2023-11-26 11:53:28,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359126984126984 [2023-11-26 11:53:28,442 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 641 transitions. [2023-11-26 11:53:28,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 641 transitions. [2023-11-26 11:53:28,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:28,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 641 transitions. [2023-11-26 11:53:28,445 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) [2023-11-26 11:53:28,449 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) [2023-11-26 11:53:28,449 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) [2023-11-26 11:53:28,449 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 980 flow. Second operand 28 states and 641 transitions. [2023-11-26 11:53:28,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 314 transitions, 3432 flow [2023-11-26 11:53:28,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 314 transitions, 3209 flow, removed 105 selfloop flow, removed 4 redundant places. [2023-11-26 11:53:28,517 INFO L231 Difference]: Finished difference. Result has 144 places, 201 transitions, 2430 flow [2023-11-26 11:53:28,518 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} [2023-11-26 11:53:28,518 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2023-11-26 11:53:28,519 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 201 transitions, 2430 flow [2023-11-26 11:53:28,519 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) [2023-11-26 11:53:28,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:28,519 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] [2023-11-26 11:53:28,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:28,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:53:28,727 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)] === [2023-11-26 11:53:28,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash -90697453, now seen corresponding path program 5 times [2023-11-26 11:53:28,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:28,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405969472] [2023-11-26 11:53:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:28,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405969472] [2023-11-26 11:53:28,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405969472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379203859] [2023-11-26 11:53:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:53:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:28,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:28,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:28,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-26 11:53:28,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:28,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:53:28,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:29,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379203859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:29,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:29,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-26 11:53:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094162877] [2023-11-26 11:53:29,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:29,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:53:29,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:53:29,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:53:29,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:29,311 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) [2023-11-26 11:53:29,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:29,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:29,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:30,817 INFO L124 PetriNetUnfolderBase]: 1671/2932 cut-off events. [2023-11-26 11:53:30,817 INFO L125 PetriNetUnfolderBase]: For 52803/52803 co-relation queries the response was YES. [2023-11-26 11:53:30,853 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. [2023-11-26 11:53:30,892 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 205 selfloop transitions, 252 changer transitions 0/463 dead transitions. [2023-11-26 11:53:30,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 463 transitions, 6441 flow [2023-11-26 11:53:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 11:53:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-26 11:53:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 665 transitions. [2023-11-26 11:53:30,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369731800766284 [2023-11-26 11:53:30,897 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 665 transitions. [2023-11-26 11:53:30,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 665 transitions. [2023-11-26 11:53:30,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:30,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 665 transitions. [2023-11-26 11:53:30,902 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) [2023-11-26 11:53:30,905 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) [2023-11-26 11:53:30,906 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) [2023-11-26 11:53:30,906 INFO L175 Difference]: Start difference. First operand has 144 places, 201 transitions, 2430 flow. Second operand 29 states and 665 transitions. [2023-11-26 11:53:30,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 463 transitions, 6441 flow [2023-11-26 11:53:31,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 463 transitions, 6236 flow, removed 96 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:31,215 INFO L231 Difference]: Finished difference. Result has 183 places, 325 transitions, 5001 flow [2023-11-26 11:53:31,216 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} [2023-11-26 11:53:31,216 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 145 predicate places. [2023-11-26 11:53:31,217 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 325 transitions, 5001 flow [2023-11-26 11:53:31,217 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) [2023-11-26 11:53:31,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:31,217 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] [2023-11-26 11:53:31,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:31,423 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)] === [2023-11-26 11:53:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1783732873, now seen corresponding path program 6 times [2023-11-26 11:53:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239983646] [2023-11-26 11:53:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:31,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239983646] [2023-11-26 11:53:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239983646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120767140] [2023-11-26 11:53:31,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:53:31,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:31,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:31,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:53:31,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:53:31,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:31,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:31,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:31,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:32,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120767140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:32,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:32,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-26 11:53:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791753078] [2023-11-26 11:53:32,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:32,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:53:32,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:53:32,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:53:32,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:32,085 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) [2023-11-26 11:53:32,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:34,575 INFO L124 PetriNetUnfolderBase]: 2193/3838 cut-off events. [2023-11-26 11:53:34,575 INFO L125 PetriNetUnfolderBase]: For 103153/103155 co-relation queries the response was YES. [2023-11-26 11:53:34,634 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. [2023-11-26 11:53:34,685 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 215 selfloop transitions, 442 changer transitions 4/667 dead transitions. [2023-11-26 11:53:34,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 667 transitions, 11121 flow [2023-11-26 11:53:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-26 11:53:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-26 11:53:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1091 transitions. [2023-11-26 11:53:34,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6184807256235828 [2023-11-26 11:53:34,691 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 1091 transitions. [2023-11-26 11:53:34,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 1091 transitions. [2023-11-26 11:53:34,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:34,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 1091 transitions. [2023-11-26 11:53:34,696 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) [2023-11-26 11:53:34,701 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) [2023-11-26 11:53:34,702 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) [2023-11-26 11:53:34,702 INFO L175 Difference]: Start difference. First operand has 183 places, 325 transitions, 5001 flow. Second operand 49 states and 1091 transitions. [2023-11-26 11:53:34,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 667 transitions, 11121 flow [2023-11-26 11:53:35,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 667 transitions, 10216 flow, removed 421 selfloop flow, removed 9 redundant places. [2023-11-26 11:53:35,525 INFO L231 Difference]: Finished difference. Result has 253 places, 517 transitions, 9033 flow [2023-11-26 11:53:35,525 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} [2023-11-26 11:53:35,526 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 215 predicate places. [2023-11-26 11:53:35,526 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 517 transitions, 9033 flow [2023-11-26 11:53:35,527 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) [2023-11-26 11:53:35,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:35,527 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] [2023-11-26 11:53:35,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:35,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:53:35,733 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)] === [2023-11-26 11:53:35,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash -217938475, now seen corresponding path program 7 times [2023-11-26 11:53:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:35,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611774581] [2023-11-26 11:53:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:35,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:35,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611774581] [2023-11-26 11:53:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611774581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:35,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898931894] [2023-11-26 11:53:35,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:53:35,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:35,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:35,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:36,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:53:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:36,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:36,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:36,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898931894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:36,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-26 11:53:36,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430353050] [2023-11-26 11:53:36,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:53:36,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:53:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:53:36,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:36,458 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) [2023-11-26 11:53:36,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:36,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:36,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:39,910 INFO L124 PetriNetUnfolderBase]: 3369/5905 cut-off events. [2023-11-26 11:53:39,911 INFO L125 PetriNetUnfolderBase]: For 180200/180200 co-relation queries the response was YES. [2023-11-26 11:53:39,999 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. [2023-11-26 11:53:40,066 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 339 selfloop transitions, 715 changer transitions 7/1067 dead transitions. [2023-11-26 11:53:40,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1067 transitions, 20674 flow [2023-11-26 11:53:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 11:53:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-26 11:53:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1020 transitions. [2023-11-26 11:53:40,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2023-11-26 11:53:40,070 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1020 transitions. [2023-11-26 11:53:40,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1020 transitions. [2023-11-26 11:53:40,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:40,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1020 transitions. [2023-11-26 11:53:40,074 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) [2023-11-26 11:53:40,078 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) [2023-11-26 11:53:40,078 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) [2023-11-26 11:53:40,079 INFO L175 Difference]: Start difference. First operand has 253 places, 517 transitions, 9033 flow. Second operand 46 states and 1020 transitions. [2023-11-26 11:53:40,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1067 transitions, 20674 flow [2023-11-26 11:53:41,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1067 transitions, 19734 flow, removed 392 selfloop flow, removed 13 redundant places. [2023-11-26 11:53:41,919 INFO L231 Difference]: Finished difference. Result has 305 places, 869 transitions, 17374 flow [2023-11-26 11:53:41,920 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} [2023-11-26 11:53:41,921 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 267 predicate places. [2023-11-26 11:53:41,921 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 869 transitions, 17374 flow [2023-11-26 11:53:41,922 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) [2023-11-26 11:53:41,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:41,922 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] [2023-11-26 11:53:41,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:42,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:53:42,129 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)] === [2023-11-26 11:53:42,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1280313235, now seen corresponding path program 8 times [2023-11-26 11:53:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:42,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590215440] [2023-11-26 11:53:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590215440] [2023-11-26 11:53:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590215440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833303134] [2023-11-26 11:53:42,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:53:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:42,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:42,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:53:42,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:53:42,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:42,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:42,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:42,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:42,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833303134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:42,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:42,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-26 11:53:42,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483295824] [2023-11-26 11:53:42,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:42,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:53:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:53:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:53:42,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:42,874 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) [2023-11-26 11:53:42,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:42,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:42,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:47,752 INFO L124 PetriNetUnfolderBase]: 3844/6640 cut-off events. [2023-11-26 11:53:47,752 INFO L125 PetriNetUnfolderBase]: For 270123/270123 co-relation queries the response was YES. [2023-11-26 11:53:47,817 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. [2023-11-26 11:53:47,876 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 499 selfloop transitions, 623 changer transitions 6/1134 dead transitions. [2023-11-26 11:53:47,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1134 transitions, 24910 flow [2023-11-26 11:53:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-26 11:53:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-26 11:53:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 770 transitions. [2023-11-26 11:53:47,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-26 11:53:47,880 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 770 transitions. [2023-11-26 11:53:47,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 770 transitions. [2023-11-26 11:53:47,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:47,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 770 transitions. [2023-11-26 11:53:47,882 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) [2023-11-26 11:53:47,885 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) [2023-11-26 11:53:47,886 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) [2023-11-26 11:53:47,886 INFO L175 Difference]: Start difference. First operand has 305 places, 869 transitions, 17374 flow. Second operand 35 states and 770 transitions. [2023-11-26 11:53:47,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1134 transitions, 24910 flow [2023-11-26 11:53:50,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1134 transitions, 24258 flow, removed 298 selfloop flow, removed 11 redundant places. [2023-11-26 11:53:51,035 INFO L231 Difference]: Finished difference. Result has 342 places, 988 transitions, 21119 flow [2023-11-26 11:53:51,036 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} [2023-11-26 11:53:51,037 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 304 predicate places. [2023-11-26 11:53:51,037 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 988 transitions, 21119 flow [2023-11-26 11:53:51,038 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) [2023-11-26 11:53:51,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:51,038 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] [2023-11-26 11:53:51,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:51,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:53:51,244 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)] === [2023-11-26 11:53:51,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash -202069929, now seen corresponding path program 9 times [2023-11-26 11:53:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:51,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228325390] [2023-11-26 11:53:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:51,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228325390] [2023-11-26 11:53:51,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228325390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612452758] [2023-11-26 11:53:51,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:53:51,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:51,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:51,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:51,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:53:51,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 11:53:51,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:53:51,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:53:51,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:51,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612452758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:51,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-26 11:53:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89335149] [2023-11-26 11:53:51,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:51,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:53:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:53:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:53:51,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:53:51,927 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) [2023-11-26 11:53:51,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:51,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:53:51,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:57,901 INFO L124 PetriNetUnfolderBase]: 4296/7479 cut-off events. [2023-11-26 11:53:57,901 INFO L125 PetriNetUnfolderBase]: For 358682/358682 co-relation queries the response was YES. [2023-11-26 11:53:58,007 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. [2023-11-26 11:53:58,078 INFO L140 encePairwiseOnDemand]: 26/36 looper letters, 309 selfloop transitions, 999 changer transitions 3/1317 dead transitions. [2023-11-26 11:53:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1317 transitions, 30427 flow [2023-11-26 11:53:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 11:53:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-26 11:53:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1023 transitions. [2023-11-26 11:53:58,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177536231884058 [2023-11-26 11:53:58,089 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1023 transitions. [2023-11-26 11:53:58,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1023 transitions. [2023-11-26 11:53:58,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:58,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1023 transitions. [2023-11-26 11:53:58,094 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) [2023-11-26 11:53:58,102 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) [2023-11-26 11:53:58,109 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) [2023-11-26 11:53:58,109 INFO L175 Difference]: Start difference. First operand has 342 places, 988 transitions, 21119 flow. Second operand 46 states and 1023 transitions. [2023-11-26 11:53:58,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1317 transitions, 30427 flow [2023-11-26 11:54:02,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1317 transitions, 29994 flow, removed 175 selfloop flow, removed 11 redundant places. [2023-11-26 11:54:02,642 INFO L231 Difference]: Finished difference. Result has 392 places, 1177 transitions, 28872 flow [2023-11-26 11:54:02,643 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} [2023-11-26 11:54:02,644 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 354 predicate places. [2023-11-26 11:54:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1177 transitions, 28872 flow [2023-11-26 11:54:02,644 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) [2023-11-26 11:54:02,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:02,644 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] [2023-11-26 11:54:02,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 11:54:02,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:54:02,845 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)] === [2023-11-26 11:54:02,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash -735050357, now seen corresponding path program 10 times [2023-11-26 11:54:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:02,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620091374] [2023-11-26 11:54:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:02,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:02,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620091374] [2023-11-26 11:54:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620091374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016264082] [2023-11-26 11:54:02,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:54:02,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:02,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:02,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223cd6f1-9c2f-4db7-9571-ec2cab11606d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:54:03,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:54:03,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:03,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:54:03,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:03,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:54:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016264082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:03,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:03,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2023-11-26 11:54:03,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361786686] [2023-11-26 11:54:03,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:03,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:54:03,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:54:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:54:03,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-26 11:54:03,294 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) [2023-11-26 11:54:03,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:03,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-26 11:54:03,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:08,679 INFO L124 PetriNetUnfolderBase]: 4296/7470 cut-off events. [2023-11-26 11:54:08,680 INFO L125 PetriNetUnfolderBase]: For 442865/442865 co-relation queries the response was YES. [2023-11-26 11:54:08,785 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. [2023-11-26 11:54:08,856 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 644 selfloop transitions, 601 changer transitions 4/1255 dead transitions. [2023-11-26 11:54:08,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1255 transitions, 32954 flow [2023-11-26 11:54:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:54:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-26 11:54:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 419 transitions. [2023-11-26 11:54:08,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466049382716049 [2023-11-26 11:54:08,858 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 419 transitions. [2023-11-26 11:54:08,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 419 transitions. [2023-11-26 11:54:08,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:08,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 419 transitions. [2023-11-26 11:54:08,860 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) [2023-11-26 11:54:08,861 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) [2023-11-26 11:54:08,862 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) [2023-11-26 11:54:08,862 INFO L175 Difference]: Start difference. First operand has 392 places, 1177 transitions, 28872 flow. Second operand 18 states and 419 transitions. [2023-11-26 11:54:08,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1255 transitions, 32954 flow