./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.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_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:03:26,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:03:26,979 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:03:26,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:03:26,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:03:27,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:03:27,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:03:27,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:03:27,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:03:27,014 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:03:27,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:03:27,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:03:27,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:03:27,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:03:27,020 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:03:27,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:03:27,021 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:03:27,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:03:27,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:03:27,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:03:27,023 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:03:27,024 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:03:27,024 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:03:27,025 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:03:27,025 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:03:27,026 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:03:27,026 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:03:27,027 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:03:27,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:03:27,028 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:03:27,029 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:03:27,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:03:27,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:27,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:03:27,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:03:27,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:03:27,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:03:27,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:03:27,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:03:27,052 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:03:27,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:03:27,053 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_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-24 22:03:27,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:03:27,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:03:27,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:03:27,327 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:03:27,327 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:03:27,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-24 22:03:30,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:03:30,584 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:03:30,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-24 22:03:30,638 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/data/bbb4b7ed3/73bae0774d9248999bff5f5fb65a72fd/FLAG9024293dc [2023-11-24 22:03:30,672 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/data/bbb4b7ed3/73bae0774d9248999bff5f5fb65a72fd [2023-11-24 22:03:30,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:03:30,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:03:30,697 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:30,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:03:30,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:03:30,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:30" (1/1) ... [2023-11-24 22:03:30,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4def17c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:30, skipping insertion in model container [2023-11-24 22:03:30,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:30" (1/1) ... [2023-11-24 22:03:30,750 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:03:30,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:30,974 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:03:30,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:31,003 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:03:31,004 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:03:31,013 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:03:31,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31 WrapperNode [2023-11-24 22:03:31,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:31,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:31,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:03:31,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:03:31,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,058 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2023-11-24 22:03:31,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:31,059 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:03:31,059 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:03:31,059 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:03:31,071 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,074 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,093 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 22:03:31,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,102 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,106 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:03:31,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:03:31,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:03:31,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:03:31,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (1/1) ... [2023-11-24 22:03:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:31,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:31,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:03:31,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:03:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:03:31,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 22:03:31,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 22:03:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 22:03:31,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 22:03:31,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:03:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:03:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:03:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:03:31,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:03:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:03:31,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:03:31,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:03:31,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:03:31,228 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:03:31,398 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:03:31,401 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:03:31,682 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:03:31,830 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:03:31,831 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 22:03:31,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:31 BoogieIcfgContainer [2023-11-24 22:03:31,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:03:31,834 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:03:31,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:03:31,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:03:31,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:03:30" (1/3) ... [2023-11-24 22:03:31,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f36d146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:31, skipping insertion in model container [2023-11-24 22:03:31,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:31" (2/3) ... [2023-11-24 22:03:31,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f36d146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:31, skipping insertion in model container [2023-11-24 22:03:31,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:31" (3/3) ... [2023-11-24 22:03:31,842 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-24 22:03:31,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:03:31,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-24 22:03:31,862 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:03:31,905 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 22:03:31,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 86 flow [2023-11-24 22:03:31,974 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-11-24 22:03:31,975 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:03:31,978 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 55 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-24 22:03:31,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 36 transitions, 86 flow [2023-11-24 22:03:31,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 78 flow [2023-11-24 22:03:31,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:03:32,000 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;@7ef3fa7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:03:32,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-24 22:03:32,004 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:03:32,004 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 22:03:32,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:03:32,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:32,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:03:32,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:32,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 8906, now seen corresponding path program 1 times [2023-11-24 22:03:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390904949] [2023-11-24 22:03:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:32,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390904949] [2023-11-24 22:03:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390904949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:03:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995121051] [2023-11-24 22:03:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:32,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-24 22:03:32,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:32,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-24 22:03:32,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:32,507 INFO L124 PetriNetUnfolderBase]: 72/159 cut-off events. [2023-11-24 22:03:32,507 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 22:03:32,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 159 events. 72/159 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 48 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 254. Up to 123 conditions per place. [2023-11-24 22:03:32,511 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-24 22:03:32,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 104 flow [2023-11-24 22:03:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:03:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-24 22:03:32,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2023-11-24 22:03:32,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-24 22:03:32,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-24 22:03:32,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:32,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-24 22:03:32,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,538 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 78 flow. Second operand 3 states and 65 transitions. [2023-11-24 22:03:32,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 104 flow [2023-11-24 22:03:32,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:03:32,545 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-24 22:03:32,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-24 22:03:32,550 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-24 22:03:32,551 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-24 22:03:32,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:32,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:03:32,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:03:32,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:32,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash 8907, now seen corresponding path program 1 times [2023-11-24 22:03:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:32,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041771896] [2023-11-24 22:03:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:32,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:32,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041771896] [2023-11-24 22:03:32,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041771896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:32,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:32,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:03:32,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583042137] [2023-11-24 22:03:32,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:32,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:32,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:32,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:32,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:32,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:32,830 INFO L124 PetriNetUnfolderBase]: 48/115 cut-off events. [2023-11-24 22:03:32,830 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 22:03:32,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 115 events. 48/115 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 364 event pairs, 31 based on Foata normal form. 13/117 useless extension candidates. Maximal degree in co-relation 204. Up to 86 conditions per place. [2023-11-24 22:03:32,832 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-24 22:03:32,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 90 flow [2023-11-24 22:03:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:03:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-24 22:03:32,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-24 22:03:32,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-24 22:03:32,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-24 22:03:32,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:32,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-24 22:03:32,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,838 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 68 transitions. [2023-11-24 22:03:32,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 90 flow [2023-11-24 22:03:32,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:03:32,840 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-24 22:03:32,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-24 22:03:32,841 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-11-24 22:03:32,841 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-24 22:03:32,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:32,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:03:32,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:03:32,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:32,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash 265553134, now seen corresponding path program 1 times [2023-11-24 22:03:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:32,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422351843] [2023-11-24 22:03:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:32,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:32,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422351843] [2023-11-24 22:03:32,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422351843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:32,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:32,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:03:32,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876437832] [2023-11-24 22:03:32,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:32,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:32,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:32,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2023-11-24 22:03:32,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:32,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2023-11-24 22:03:32,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:33,026 INFO L124 PetriNetUnfolderBase]: 55/122 cut-off events. [2023-11-24 22:03:33,026 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 22:03:33,027 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 361 event pairs, 36 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 225. Up to 100 conditions per place. [2023-11-24 22:03:33,028 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 16 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-24 22:03:33,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 91 flow [2023-11-24 22:03:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:03:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-24 22:03:33,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-24 22:03:33,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-24 22:03:33,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-24 22:03:33,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:33,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-24 22:03:33,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,035 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 64 transitions. [2023-11-24 22:03:33,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 91 flow [2023-11-24 22:03:33,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:03:33,037 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-24 22:03:33,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-24 22:03:33,039 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-11-24 22:03:33,039 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-24 22:03:33,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:33,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:03:33,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:03:33,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:33,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 265553135, now seen corresponding path program 1 times [2023-11-24 22:03:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:33,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306747215] [2023-11-24 22:03:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:33,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:33,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:33,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306747215] [2023-11-24 22:03:33,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306747215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:33,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:33,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:03:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803632483] [2023-11-24 22:03:33,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:33,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:33,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:33,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:33,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:33,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:33,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:33,268 INFO L124 PetriNetUnfolderBase]: 48/107 cut-off events. [2023-11-24 22:03:33,268 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 22:03:33,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 107 events. 48/107 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 311 event pairs, 31 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 196. Up to 86 conditions per place. [2023-11-24 22:03:33,270 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-24 22:03:33,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 84 flow [2023-11-24 22:03:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:03:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-24 22:03:33,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-24 22:03:33,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-24 22:03:33,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-24 22:03:33,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:33,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-24 22:03:33,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,274 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 68 transitions. [2023-11-24 22:03:33,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 84 flow [2023-11-24 22:03:33,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:03:33,276 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-24 22:03:33,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-24 22:03:33,277 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-11-24 22:03:33,277 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-24 22:03:33,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:33,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:03:33,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:33,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1510092245, now seen corresponding path program 1 times [2023-11-24 22:03:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777860210] [2023-11-24 22:03:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:33,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:33,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777860210] [2023-11-24 22:03:33,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777860210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:33,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:33,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:33,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135202563] [2023-11-24 22:03:33,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:33,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:33,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:33,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-24 22:03:33,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:33,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-24 22:03:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:33,494 INFO L124 PetriNetUnfolderBase]: 70/154 cut-off events. [2023-11-24 22:03:33,495 INFO L125 PetriNetUnfolderBase]: For 3/5 co-relation queries the response was YES. [2023-11-24 22:03:33,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 154 events. 70/154 cut-off events. For 3/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 490 event pairs, 33 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 283. Up to 86 conditions per place. [2023-11-24 22:03:33,497 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 20 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-24 22:03:33,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 118 flow [2023-11-24 22:03:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:03:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-24 22:03:33,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-24 22:03:33,499 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-24 22:03:33,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-24 22:03:33,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:33,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-24 22:03:33,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,502 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 4 states and 100 transitions. [2023-11-24 22:03:33,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 118 flow [2023-11-24 22:03:33,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:03:33,504 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 68 flow [2023-11-24 22:03:33,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-24 22:03:33,505 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-11-24 22:03:33,505 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 68 flow [2023-11-24 22:03:33,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:33,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:33,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:03:33,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:33,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1119864072, now seen corresponding path program 1 times [2023-11-24 22:03:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:33,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187480705] [2023-11-24 22:03:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:33,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187480705] [2023-11-24 22:03:33,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187480705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:33,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:33,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:33,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180905363] [2023-11-24 22:03:33,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:33,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2023-11-24 22:03:33,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:33,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2023-11-24 22:03:33,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:33,740 INFO L124 PetriNetUnfolderBase]: 89/196 cut-off events. [2023-11-24 22:03:33,740 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-24 22:03:33,742 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 689 event pairs, 49 based on Foata normal form. 13/206 useless extension candidates. Maximal degree in co-relation 407. Up to 124 conditions per place. [2023-11-24 22:03:33,744 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-24 22:03:33,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 143 flow [2023-11-24 22:03:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:03:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-24 22:03:33,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-24 22:03:33,749 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-24 22:03:33,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-24 22:03:33,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:33,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-24 22:03:33,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,755 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,755 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 68 flow. Second operand 4 states and 99 transitions. [2023-11-24 22:03:33,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 143 flow [2023-11-24 22:03:33,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:03:33,758 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 78 flow [2023-11-24 22:03:33,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-24 22:03:33,762 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-24 22:03:33,762 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 78 flow [2023-11-24 22:03:33,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:33,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:03:33,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:33,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1057413530, now seen corresponding path program 1 times [2023-11-24 22:03:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:33,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336239871] [2023-11-24 22:03:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:34,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:34,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336239871] [2023-11-24 22:03:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336239871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:34,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338500910] [2023-11-24 22:03:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:34,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:34,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:34,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:03:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:34,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:03:34,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:34,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338500910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:35,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:03:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218273595] [2023-11-24 22:03:35,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:03:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:35,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:03:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:35,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:35,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 78 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:35,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:35,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:35,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:37,102 INFO L124 PetriNetUnfolderBase]: 396/719 cut-off events. [2023-11-24 22:03:37,103 INFO L125 PetriNetUnfolderBase]: For 205/208 co-relation queries the response was YES. [2023-11-24 22:03:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 719 events. 396/719 cut-off events. For 205/208 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3178 event pairs, 22 based on Foata normal form. 4/723 useless extension candidates. Maximal degree in co-relation 1741. Up to 195 conditions per place. [2023-11-24 22:03:37,110 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 89 selfloop transitions, 64 changer transitions 13/172 dead transitions. [2023-11-24 22:03:37,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 172 transitions, 847 flow [2023-11-24 22:03:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 22:03:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-24 22:03:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 636 transitions. [2023-11-24 22:03:37,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2023-11-24 22:03:37,115 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 636 transitions. [2023-11-24 22:03:37,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 636 transitions. [2023-11-24 22:03:37,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:37,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 636 transitions. [2023-11-24 22:03:37,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 22.714285714285715) internal successors, (636), 28 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:37,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:37,123 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 36.0) internal successors, (1044), 29 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:37,123 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 78 flow. Second operand 28 states and 636 transitions. [2023-11-24 22:03:37,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 172 transitions, 847 flow [2023-11-24 22:03:37,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 172 transitions, 829 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:03:37,130 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 581 flow [2023-11-24 22:03:37,130 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=581, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2023-11-24 22:03:37,131 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-11-24 22:03:37,131 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 581 flow [2023-11-24 22:03:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:37,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:37,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:37,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 22:03:37,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:37,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:37,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2142819638, now seen corresponding path program 2 times [2023-11-24 22:03:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:37,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451770963] [2023-11-24 22:03:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:37,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451770963] [2023-11-24 22:03:37,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451770963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:37,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170682566] [2023-11-24 22:03:37,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:37,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:37,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:37,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:37,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:03:37,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:03:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:37,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:03:37,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:38,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:38,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170682566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:38,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:38,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:03:38,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270626631] [2023-11-24 22:03:38,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:03:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:03:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:38,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:38,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 581 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:38,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:38,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:38,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:40,228 INFO L124 PetriNetUnfolderBase]: 578/1099 cut-off events. [2023-11-24 22:03:40,228 INFO L125 PetriNetUnfolderBase]: For 2953/2958 co-relation queries the response was YES. [2023-11-24 22:03:40,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 1099 events. 578/1099 cut-off events. For 2953/2958 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5719 event pairs, 44 based on Foata normal form. 5/1104 useless extension candidates. Maximal degree in co-relation 4386. Up to 222 conditions per place. [2023-11-24 22:03:40,243 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 113 selfloop transitions, 99 changer transitions 26/244 dead transitions. [2023-11-24 22:03:40,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 244 transitions, 1947 flow [2023-11-24 22:03:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-24 22:03:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-24 22:03:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 628 transitions. [2023-11-24 22:03:40,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6460905349794238 [2023-11-24 22:03:40,247 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 628 transitions. [2023-11-24 22:03:40,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 628 transitions. [2023-11-24 22:03:40,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:40,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 628 transitions. [2023-11-24 22:03:40,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 23.25925925925926) internal successors, (628), 27 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:40,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 36.0) internal successors, (1008), 28 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:40,253 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 36.0) internal successors, (1008), 28 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:40,253 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 581 flow. Second operand 27 states and 628 transitions. [2023-11-24 22:03:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 244 transitions, 1947 flow [2023-11-24 22:03:40,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 244 transitions, 1914 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-24 22:03:40,289 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1249 flow [2023-11-24 22:03:40,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1249, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2023-11-24 22:03:40,290 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 74 predicate places. [2023-11-24 22:03:40,290 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1249 flow [2023-11-24 22:03:40,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:40,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:40,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:40,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:40,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 22:03:40,497 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:40,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash 288002586, now seen corresponding path program 3 times [2023-11-24 22:03:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:40,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097367321] [2023-11-24 22:03:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:40,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097367321] [2023-11-24 22:03:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097367321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872019211] [2023-11-24 22:03:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:03:40,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:40,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:40,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:03:40,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 22:03:40,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:40,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:03:40,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:41,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872019211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:41,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:41,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:03:41,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004123004] [2023-11-24 22:03:41,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:41,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:03:41,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:03:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:41,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:41,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1249 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:41,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:41,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:41,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:43,449 INFO L124 PetriNetUnfolderBase]: 605/1169 cut-off events. [2023-11-24 22:03:43,450 INFO L125 PetriNetUnfolderBase]: For 6849/6855 co-relation queries the response was YES. [2023-11-24 22:03:43,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 1169 events. 605/1169 cut-off events. For 6849/6855 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6256 event pairs, 33 based on Foata normal form. 7/1176 useless extension candidates. Maximal degree in co-relation 5831. Up to 233 conditions per place. [2023-11-24 22:03:43,471 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 107 selfloop transitions, 120 changer transitions 22/255 dead transitions. [2023-11-24 22:03:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 255 transitions, 2582 flow [2023-11-24 22:03:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 22:03:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-24 22:03:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 690 transitions. [2023-11-24 22:03:43,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-24 22:03:43,475 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 690 transitions. [2023-11-24 22:03:43,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 690 transitions. [2023-11-24 22:03:43,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:43,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 690 transitions. [2023-11-24 22:03:43,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 23.0) internal successors, (690), 30 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 36.0) internal successors, (1116), 31 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,483 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 36.0) internal successors, (1116), 31 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,483 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1249 flow. Second operand 30 states and 690 transitions. [2023-11-24 22:03:43,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 255 transitions, 2582 flow [2023-11-24 22:03:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 255 transitions, 2391 flow, removed 70 selfloop flow, removed 10 redundant places. [2023-11-24 22:03:43,560 INFO L231 Difference]: Finished difference. Result has 141 places, 162 transitions, 1757 flow [2023-11-24 22:03:43,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1757, PETRI_PLACES=141, PETRI_TRANSITIONS=162} [2023-11-24 22:03:43,562 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 103 predicate places. [2023-11-24 22:03:43,563 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 162 transitions, 1757 flow [2023-11-24 22:03:43,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:43,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:43,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:43,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:43,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:43,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash -54529284, now seen corresponding path program 4 times [2023-11-24 22:03:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577596956] [2023-11-24 22:03:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:44,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577596956] [2023-11-24 22:03:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577596956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718799463] [2023-11-24 22:03:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 22:03:44,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:44,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:44,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:03:44,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 22:03:44,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:44,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:03:44,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:44,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:45,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718799463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:45,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:45,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-24 22:03:45,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212901718] [2023-11-24 22:03:45,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:45,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 22:03:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 22:03:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:03:45,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:45,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 162 transitions, 1757 flow. Second operand has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:45,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:45,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:45,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:46,769 INFO L124 PetriNetUnfolderBase]: 749/1433 cut-off events. [2023-11-24 22:03:46,769 INFO L125 PetriNetUnfolderBase]: For 11129/11136 co-relation queries the response was YES. [2023-11-24 22:03:46,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8206 conditions, 1433 events. 749/1433 cut-off events. For 11129/11136 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8029 event pairs, 38 based on Foata normal form. 3/1436 useless extension candidates. Maximal degree in co-relation 8151. Up to 482 conditions per place. [2023-11-24 22:03:46,794 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 130 selfloop transitions, 171 changer transitions 17/324 dead transitions. [2023-11-24 22:03:46,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 324 transitions, 3950 flow [2023-11-24 22:03:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-24 22:03:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-24 22:03:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 731 transitions. [2023-11-24 22:03:46,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345486111111112 [2023-11-24 22:03:46,802 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 731 transitions. [2023-11-24 22:03:46,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 731 transitions. [2023-11-24 22:03:46,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:46,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 731 transitions. [2023-11-24 22:03:46,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 22.84375) internal successors, (731), 32 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:46,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:46,815 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:46,816 INFO L175 Difference]: Start difference. First operand has 141 places, 162 transitions, 1757 flow. Second operand 32 states and 731 transitions. [2023-11-24 22:03:46,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 324 transitions, 3950 flow [2023-11-24 22:03:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 324 transitions, 3550 flow, removed 88 selfloop flow, removed 19 redundant places. [2023-11-24 22:03:46,940 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 2936 flow [2023-11-24 22:03:46,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2936, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2023-11-24 22:03:46,941 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-11-24 22:03:46,942 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 2936 flow [2023-11-24 22:03:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:46,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:46,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:46,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:47,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:03:47,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:47,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash -567933888, now seen corresponding path program 5 times [2023-11-24 22:03:47,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:47,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088250446] [2023-11-24 22:03:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088250446] [2023-11-24 22:03:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088250446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151029030] [2023-11-24 22:03:47,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 22:03:47,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:47,463 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:47,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:03:47,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 22:03:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:47,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:03:47,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:47,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151029030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:48,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:48,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-24 22:03:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755243036] [2023-11-24 22:03:48,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:48,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 22:03:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 22:03:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:03:48,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:48,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 2936 flow. Second operand has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:48,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:48,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:48,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:50,187 INFO L124 PetriNetUnfolderBase]: 766/1469 cut-off events. [2023-11-24 22:03:50,187 INFO L125 PetriNetUnfolderBase]: For 14470/14477 co-relation queries the response was YES. [2023-11-24 22:03:50,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9354 conditions, 1469 events. 766/1469 cut-off events. For 14470/14477 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8233 event pairs, 18 based on Foata normal form. 7/1476 useless extension candidates. Maximal degree in co-relation 9286. Up to 490 conditions per place. [2023-11-24 22:03:50,218 INFO L140 encePairwiseOnDemand]: 25/36 looper letters, 138 selfloop transitions, 207 changer transitions 19/370 dead transitions. [2023-11-24 22:03:50,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 370 transitions, 5043 flow [2023-11-24 22:03:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-24 22:03:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-24 22:03:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 881 transitions. [2023-11-24 22:03:50,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118055555555556 [2023-11-24 22:03:50,222 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 881 transitions. [2023-11-24 22:03:50,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 881 transitions. [2023-11-24 22:03:50,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:50,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 881 transitions. [2023-11-24 22:03:50,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 22.025) internal successors, (881), 40 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:50,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 36.0) internal successors, (1476), 41 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:50,229 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 36.0) internal successors, (1476), 41 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:50,229 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 2936 flow. Second operand 40 states and 881 transitions. [2023-11-24 22:03:50,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 370 transitions, 5043 flow [2023-11-24 22:03:50,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 370 transitions, 4860 flow, removed 88 selfloop flow, removed 4 redundant places. [2023-11-24 22:03:50,414 INFO L231 Difference]: Finished difference. Result has 206 places, 275 transitions, 3948 flow [2023-11-24 22:03:50,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3948, PETRI_PLACES=206, PETRI_TRANSITIONS=275} [2023-11-24 22:03:50,415 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 168 predicate places. [2023-11-24 22:03:50,415 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 275 transitions, 3948 flow [2023-11-24 22:03:50,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.846153846153847) internal successors, (490), 26 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:50,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:50,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:50,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:50,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:03:50,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:50,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1549653760, now seen corresponding path program 6 times [2023-11-24 22:03:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:50,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054688479] [2023-11-24 22:03:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:50,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:50,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054688479] [2023-11-24 22:03:50,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054688479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:50,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170706657] [2023-11-24 22:03:50,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 22:03:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:50,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:50,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:03:50,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 22:03:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:50,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:03:50,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:51,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170706657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:51,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:51,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:03:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950736100] [2023-11-24 22:03:51,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:03:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:03:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:51,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:51,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 275 transitions, 3948 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:51,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:51,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:51,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:53,553 INFO L124 PetriNetUnfolderBase]: 930/1786 cut-off events. [2023-11-24 22:03:53,553 INFO L125 PetriNetUnfolderBase]: For 21934/21937 co-relation queries the response was YES. [2023-11-24 22:03:53,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12505 conditions, 1786 events. 930/1786 cut-off events. For 21934/21937 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10325 event pairs, 45 based on Foata normal form. 4/1790 useless extension candidates. Maximal degree in co-relation 12429. Up to 375 conditions per place. [2023-11-24 22:03:53,581 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 180 selfloop transitions, 252 changer transitions 21/459 dead transitions. [2023-11-24 22:03:53,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 459 transitions, 7108 flow [2023-11-24 22:03:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-24 22:03:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-24 22:03:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 762 transitions. [2023-11-24 22:03:53,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2023-11-24 22:03:53,584 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 762 transitions. [2023-11-24 22:03:53,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 762 transitions. [2023-11-24 22:03:53,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:53,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 762 transitions. [2023-11-24 22:03:53,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 23.09090909090909) internal successors, (762), 33 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:53,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 36.0) internal successors, (1224), 34 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:53,590 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 36.0) internal successors, (1224), 34 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:53,590 INFO L175 Difference]: Start difference. First operand has 206 places, 275 transitions, 3948 flow. Second operand 33 states and 762 transitions. [2023-11-24 22:03:53,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 459 transitions, 7108 flow [2023-11-24 22:03:53,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 459 transitions, 6510 flow, removed 199 selfloop flow, removed 17 redundant places. [2023-11-24 22:03:53,899 INFO L231 Difference]: Finished difference. Result has 232 places, 345 transitions, 5501 flow [2023-11-24 22:03:53,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5501, PETRI_PLACES=232, PETRI_TRANSITIONS=345} [2023-11-24 22:03:53,900 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 194 predicate places. [2023-11-24 22:03:53,900 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 345 transitions, 5501 flow [2023-11-24 22:03:53,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:53,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:53,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:53,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 22:03:54,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:54,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:54,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash -113326602, now seen corresponding path program 7 times [2023-11-24 22:03:54,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:54,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158710069] [2023-11-24 22:03:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:54,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158710069] [2023-11-24 22:03:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158710069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543775551] [2023-11-24 22:03:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 22:03:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:54,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:54,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:03:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:54,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:03:54,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:54,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543775551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:55,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:03:55,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403398748] [2023-11-24 22:03:55,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:55,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:03:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:03:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:55,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:55,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 345 transitions, 5501 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:55,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:55,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:55,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:57,325 INFO L124 PetriNetUnfolderBase]: 1312/2474 cut-off events. [2023-11-24 22:03:57,326 INFO L125 PetriNetUnfolderBase]: For 37291/37306 co-relation queries the response was YES. [2023-11-24 22:03:57,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18962 conditions, 2474 events. 1312/2474 cut-off events. For 37291/37306 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15305 event pairs, 48 based on Foata normal form. 23/2497 useless extension candidates. Maximal degree in co-relation 18876. Up to 974 conditions per place. [2023-11-24 22:03:57,390 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 237 selfloop transitions, 349 changer transitions 21/613 dead transitions. [2023-11-24 22:03:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 613 transitions, 10599 flow [2023-11-24 22:03:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-24 22:03:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-24 22:03:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 707 transitions. [2023-11-24 22:03:57,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137152777777778 [2023-11-24 22:03:57,395 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 707 transitions. [2023-11-24 22:03:57,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 707 transitions. [2023-11-24 22:03:57,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:57,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 707 transitions. [2023-11-24 22:03:57,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 22.09375) internal successors, (707), 32 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:57,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:57,403 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 36.0) internal successors, (1188), 33 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:57,403 INFO L175 Difference]: Start difference. First operand has 232 places, 345 transitions, 5501 flow. Second operand 32 states and 707 transitions. [2023-11-24 22:03:57,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 613 transitions, 10599 flow [2023-11-24 22:03:57,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 613 transitions, 10369 flow, removed 74 selfloop flow, removed 8 redundant places. [2023-11-24 22:03:57,966 INFO L231 Difference]: Finished difference. Result has 268 places, 518 transitions, 9746 flow [2023-11-24 22:03:57,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9746, PETRI_PLACES=268, PETRI_TRANSITIONS=518} [2023-11-24 22:03:57,967 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 230 predicate places. [2023-11-24 22:03:57,967 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 518 transitions, 9746 flow [2023-11-24 22:03:57,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:57,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:57,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:57,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:58,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 22:03:58,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:03:58,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:58,170 INFO L85 PathProgramCache]: Analyzing trace with hash -263826888, now seen corresponding path program 8 times [2023-11-24 22:03:58,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:58,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416323996] [2023-11-24 22:03:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416323996] [2023-11-24 22:03:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416323996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134189396] [2023-11-24 22:03:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:58,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:58,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:58,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:03:58,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:03:58,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:58,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:03:58,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:58,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:59,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134189396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:59,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:59,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:03:59,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422526593] [2023-11-24 22:03:59,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:59,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:03:59,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:03:59,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:03:59,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:03:59,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 518 transitions, 9746 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:59,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:59,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:03:59,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:01,229 INFO L124 PetriNetUnfolderBase]: 1281/2405 cut-off events. [2023-11-24 22:04:01,229 INFO L125 PetriNetUnfolderBase]: For 46927/46939 co-relation queries the response was YES. [2023-11-24 22:04:01,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 2405 events. 1281/2405 cut-off events. For 46927/46939 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14641 event pairs, 44 based on Foata normal form. 7/2412 useless extension candidates. Maximal degree in co-relation 20867. Up to 1078 conditions per place. [2023-11-24 22:04:01,282 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 249 selfloop transitions, 304 changer transitions 21/580 dead transitions. [2023-11-24 22:04:01,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 580 transitions, 11520 flow [2023-11-24 22:04:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:04:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-24 22:04:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 521 transitions. [2023-11-24 22:04:01,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292270531400966 [2023-11-24 22:04:01,285 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 521 transitions. [2023-11-24 22:04:01,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 521 transitions. [2023-11-24 22:04:01,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:01,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 521 transitions. [2023-11-24 22:04:01,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 22.652173913043477) internal successors, (521), 23 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:01,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:01,291 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 36.0) internal successors, (864), 24 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:01,291 INFO L175 Difference]: Start difference. First operand has 268 places, 518 transitions, 9746 flow. Second operand 23 states and 521 transitions. [2023-11-24 22:04:01,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 580 transitions, 11520 flow [2023-11-24 22:04:02,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 580 transitions, 11354 flow, removed 68 selfloop flow, removed 5 redundant places. [2023-11-24 22:04:02,105 INFO L231 Difference]: Finished difference. Result has 285 places, 509 transitions, 10034 flow [2023-11-24 22:04:02,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9588, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10034, PETRI_PLACES=285, PETRI_TRANSITIONS=509} [2023-11-24 22:04:02,107 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 247 predicate places. [2023-11-24 22:04:02,107 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 509 transitions, 10034 flow [2023-11-24 22:04:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:02,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:02,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:02,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-24 22:04:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 22:04:02,308 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:04:02,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash -684171912, now seen corresponding path program 9 times [2023-11-24 22:04:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:02,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406988909] [2023-11-24 22:04:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:02,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406988909] [2023-11-24 22:04:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406988909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489629902] [2023-11-24 22:04:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:04:02,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:02,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:02,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:04:02,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 22:04:02,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:04:02,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:04:02,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:03,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489629902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:04:03,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:04:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:04:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625731236] [2023-11-24 22:04:03,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:04:03,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:04:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:04:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:04:03,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:04:03,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 509 transitions, 10034 flow. Second operand has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:03,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:03,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:04:03,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:05,719 INFO L124 PetriNetUnfolderBase]: 1286/2401 cut-off events. [2023-11-24 22:04:05,719 INFO L125 PetriNetUnfolderBase]: For 46732/46745 co-relation queries the response was YES. [2023-11-24 22:04:05,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21494 conditions, 2401 events. 1286/2401 cut-off events. For 46732/46745 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14466 event pairs, 42 based on Foata normal form. 6/2407 useless extension candidates. Maximal degree in co-relation 21388. Up to 1072 conditions per place. [2023-11-24 22:04:05,769 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 238 selfloop transitions, 363 changer transitions 7/614 dead transitions. [2023-11-24 22:04:05,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 614 transitions, 12674 flow [2023-11-24 22:04:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-24 22:04:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-24 22:04:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 638 transitions. [2023-11-24 22:04:05,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-24 22:04:05,772 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 638 transitions. [2023-11-24 22:04:05,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 638 transitions. [2023-11-24 22:04:05,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:05,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 638 transitions. [2023-11-24 22:04:05,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 22.0) internal successors, (638), 29 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:05,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:05,778 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 36.0) internal successors, (1080), 30 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:05,778 INFO L175 Difference]: Start difference. First operand has 285 places, 509 transitions, 10034 flow. Second operand 29 states and 638 transitions. [2023-11-24 22:04:05,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 614 transitions, 12674 flow [2023-11-24 22:04:06,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 614 transitions, 12121 flow, removed 15 selfloop flow, removed 20 redundant places. [2023-11-24 22:04:06,620 INFO L231 Difference]: Finished difference. Result has 297 places, 552 transitions, 11660 flow [2023-11-24 22:04:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=9521, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11660, PETRI_PLACES=297, PETRI_TRANSITIONS=552} [2023-11-24 22:04:06,621 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 259 predicate places. [2023-11-24 22:04:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 552 transitions, 11660 flow [2023-11-24 22:04:06,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.92) internal successors, (473), 25 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:06,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:06,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:06,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-24 22:04:06,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:06,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:04:06,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -998535992, now seen corresponding path program 10 times [2023-11-24 22:04:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:06,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194529675] [2023-11-24 22:04:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:06,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:04:06,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:06,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194529675] [2023-11-24 22:04:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194529675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:06,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9035900] [2023-11-24 22:04:06,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 22:04:06,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:06,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:06,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:06,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:04:07,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 22:04:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:04:07,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:04:07,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:04:07,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:04:07,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9035900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:04:07,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:04:07,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 22:04:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458132667] [2023-11-24 22:04:07,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:04:07,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:04:07,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:04:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:04:07,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2023-11-24 22:04:07,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 552 transitions, 11660 flow. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:07,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:07,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2023-11-24 22:04:07,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:07,897 INFO L124 PetriNetUnfolderBase]: 1152/2181 cut-off events. [2023-11-24 22:04:07,897 INFO L125 PetriNetUnfolderBase]: For 52526/52545 co-relation queries the response was YES. [2023-11-24 22:04:07,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21225 conditions, 2181 events. 1152/2181 cut-off events. For 52526/52545 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13125 event pairs, 40 based on Foata normal form. 44/2218 useless extension candidates. Maximal degree in co-relation 21114. Up to 1110 conditions per place. [2023-11-24 22:04:07,946 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 319 selfloop transitions, 163 changer transitions 1/553 dead transitions. [2023-11-24 22:04:07,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 553 transitions, 12576 flow [2023-11-24 22:04:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:04:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:04:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-24 22:04:07,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2023-11-24 22:04:07,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-24 22:04:07,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-24 22:04:07,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:07,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-24 22:04:07,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:07,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:07,949 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:07,949 INFO L175 Difference]: Start difference. First operand has 297 places, 552 transitions, 11660 flow. Second operand 5 states and 124 transitions. [2023-11-24 22:04:07,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 553 transitions, 12576 flow [2023-11-24 22:04:08,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 553 transitions, 12221 flow, removed 77 selfloop flow, removed 17 redundant places. [2023-11-24 22:04:08,873 INFO L231 Difference]: Finished difference. Result has 271 places, 531 transitions, 11558 flow [2023-11-24 22:04:08,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=10817, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11558, PETRI_PLACES=271, PETRI_TRANSITIONS=531} [2023-11-24 22:04:08,875 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 233 predicate places. [2023-11-24 22:04:08,875 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 531 transitions, 11558 flow [2023-11-24 22:04:08,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:08,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:08,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:08,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:09,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 22:04:09,081 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:04:09,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -533069690, now seen corresponding path program 11 times [2023-11-24 22:04:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693656321] [2023-11-24 22:04:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:09,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693656321] [2023-11-24 22:04:09,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693656321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:09,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898907423] [2023-11-24 22:04:09,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 22:04:09,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:09,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:09,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 22:04:09,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 22:04:09,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:04:09,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:04:09,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:09,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898907423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:04:10,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:04:10,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-24 22:04:10,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812118372] [2023-11-24 22:04:10,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:04:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 22:04:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 22:04:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:04:10,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:04:10,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 531 transitions, 11558 flow. Second operand has 26 states, 26 states have (on average 18.884615384615383) internal successors, (491), 26 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:10,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:10,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:04:10,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:12,530 INFO L124 PetriNetUnfolderBase]: 1382/2589 cut-off events. [2023-11-24 22:04:12,530 INFO L125 PetriNetUnfolderBase]: For 63135/63143 co-relation queries the response was YES. [2023-11-24 22:04:12,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25316 conditions, 2589 events. 1382/2589 cut-off events. For 63135/63143 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15749 event pairs, 29 based on Foata normal form. 9/2598 useless extension candidates. Maximal degree in co-relation 25209. Up to 975 conditions per place. [2023-11-24 22:04:12,648 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 278 selfloop transitions, 396 changer transitions 21/701 dead transitions. [2023-11-24 22:04:12,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 701 transitions, 15929 flow [2023-11-24 22:04:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-24 22:04:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-24 22:04:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 706 transitions. [2023-11-24 22:04:12,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326164874551972 [2023-11-24 22:04:12,650 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 706 transitions. [2023-11-24 22:04:12,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 706 transitions. [2023-11-24 22:04:12,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:12,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 706 transitions. [2023-11-24 22:04:12,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 22.774193548387096) internal successors, (706), 31 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:12,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 36.0) internal successors, (1152), 32 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:12,657 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 36.0) internal successors, (1152), 32 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:12,657 INFO L175 Difference]: Start difference. First operand has 271 places, 531 transitions, 11558 flow. Second operand 31 states and 706 transitions. [2023-11-24 22:04:12,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 701 transitions, 15929 flow [2023-11-24 22:04:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 701 transitions, 15909 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-24 22:04:13,457 INFO L231 Difference]: Finished difference. Result has 315 places, 612 transitions, 15221 flow [2023-11-24 22:04:13,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=11545, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15221, PETRI_PLACES=315, PETRI_TRANSITIONS=612} [2023-11-24 22:04:13,459 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 277 predicate places. [2023-11-24 22:04:13,459 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 612 transitions, 15221 flow [2023-11-24 22:04:13,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.884615384615383) internal successors, (491), 26 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:13,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:13,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:13,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-24 22:04:13,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:13,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:04:13,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1879188966, now seen corresponding path program 12 times [2023-11-24 22:04:13,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:13,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848244577] [2023-11-24 22:04:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:13,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:13,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848244577] [2023-11-24 22:04:13,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848244577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544144390] [2023-11-24 22:04:13,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 22:04:13,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:13,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:13,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:13,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 22:04:14,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 22:04:14,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:04:14,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:04:14,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:14,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:15,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544144390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:04:15,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:04:15,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-24 22:04:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761492332] [2023-11-24 22:04:15,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:04:15,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:04:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:04:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-24 22:04:15,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2023-11-24 22:04:15,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 612 transitions, 15221 flow. Second operand has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:15,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:15,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2023-11-24 22:04:15,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:16,775 INFO L124 PetriNetUnfolderBase]: 1347/2506 cut-off events. [2023-11-24 22:04:16,776 INFO L125 PetriNetUnfolderBase]: For 71048/71057 co-relation queries the response was YES. [2023-11-24 22:04:16,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26990 conditions, 2506 events. 1347/2506 cut-off events. For 71048/71057 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14916 event pairs, 33 based on Foata normal form. 7/2513 useless extension candidates. Maximal degree in co-relation 26866. Up to 1133 conditions per place. [2023-11-24 22:04:16,931 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 282 selfloop transitions, 350 changer transitions 18/656 dead transitions. [2023-11-24 22:04:16,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 656 transitions, 16926 flow [2023-11-24 22:04:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 22:04:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 22:04:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 435 transitions. [2023-11-24 22:04:16,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359649122807017 [2023-11-24 22:04:16,934 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 435 transitions. [2023-11-24 22:04:16,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 435 transitions. [2023-11-24 22:04:16,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:16,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 435 transitions. [2023-11-24 22:04:16,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 22.894736842105264) internal successors, (435), 19 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:16,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:16,938 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:16,938 INFO L175 Difference]: Start difference. First operand has 315 places, 612 transitions, 15221 flow. Second operand 19 states and 435 transitions. [2023-11-24 22:04:16,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 656 transitions, 16926 flow [2023-11-24 22:04:18,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 656 transitions, 16356 flow, removed 209 selfloop flow, removed 13 redundant places. [2023-11-24 22:04:18,113 INFO L231 Difference]: Finished difference. Result has 320 places, 604 transitions, 15227 flow [2023-11-24 22:04:18,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=14688, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15227, PETRI_PLACES=320, PETRI_TRANSITIONS=604} [2023-11-24 22:04:18,115 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 282 predicate places. [2023-11-24 22:04:18,115 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 604 transitions, 15227 flow [2023-11-24 22:04:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.96) internal successors, (474), 25 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:18,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:18,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:18,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:18,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 22:04:18,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash -294210184, now seen corresponding path program 13 times [2023-11-24 22:04:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24618306] [2023-11-24 22:04:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:18,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:18,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24618306] [2023-11-24 22:04:18,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24618306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:18,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619387586] [2023-11-24 22:04:18,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 22:04:18,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:18,651 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d96f76e-e474-406e-b031-809ae0186da8/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 22:04:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:18,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:04:18,748 INFO L285 TraceCheckSpWp]: Computing forward predicates...