./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-easy1.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_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya --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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:15:01,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:15:01,154 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:15:01,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:15:01,159 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:15:01,183 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:15:01,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:15:01,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:15:01,185 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:15:01,185 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:15:01,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:15:01,187 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:15:01,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:15:01,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:15:01,188 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:15:01,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:15:01,189 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:15:01,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:15:01,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:15:01,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:15:01,191 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:15:01,192 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:15:01,192 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:15:01,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:15:01,193 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:15:01,193 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:15:01,194 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:15:01,194 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:15:01,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:15:01,195 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:15:01,195 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:15:01,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:15:01,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:15:01,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:15:01,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:15:01,197 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:15:01,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:15:01,197 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:15:01,197 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:15:01,197 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:15:01,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:15:01,198 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_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2023-11-29 06:15:01,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:15:01,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:15:01,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:15:01,446 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:15:01,446 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:15:01,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-29 06:15:04,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:15:04,488 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:15:04,488 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-29 06:15:04,495 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/data/c6aaa324c/030cfde496dc4caf9a231a9e61bc2043/FLAGd607cbb65 [2023-11-29 06:15:04,507 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/data/c6aaa324c/030cfde496dc4caf9a231a9e61bc2043 [2023-11-29 06:15:04,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:15:04,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:15:04,512 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:15:04,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:15:04,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:15:04,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8cba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04, skipping insertion in model container [2023-11-29 06:15:04,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:15:04,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:15:04,689 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:15:04,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:15:04,727 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:15:04,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04 WrapperNode [2023-11-29 06:15:04,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:15:04,728 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:15:04,728 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:15:04,729 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:15:04,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,763 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 59 [2023-11-29 06:15:04,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:15:04,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:15:04,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:15:04,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:15:04,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,791 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]. [2023-11-29 06:15:04,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,792 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:15:04,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:15:04,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:15:04,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:15:04,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (1/1) ... [2023-11-29 06:15:04,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:15:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:04,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:15:04,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:15:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:15:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:15:04,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:15:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:15:04,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:15:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:15:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:15:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:15:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:15:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:15:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:15:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:15:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:15:04,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:15:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:15:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:15:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:15:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:15:04,878 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:15:04,987 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:15:04,989 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:15:05,179 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:15:05,309 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:15:05,309 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:15:05,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:15:05 BoogieIcfgContainer [2023-11-29 06:15:05,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:15:05,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:15:05,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:15:05,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:15:05,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:15:04" (1/3) ... [2023-11-29 06:15:05,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71547d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:15:05, skipping insertion in model container [2023-11-29 06:15:05,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:04" (2/3) ... [2023-11-29 06:15:05,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71547d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:15:05, skipping insertion in model container [2023-11-29 06:15:05,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:15:05" (3/3) ... [2023-11-29 06:15:05,339 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-11-29 06:15:05,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:15:05,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 06:15:05,354 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:15:05,389 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:15:05,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 33 transitions, 80 flow [2023-11-29 06:15:05,440 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-11-29 06:15:05,440 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:15:05,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 2/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-29 06:15:05,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 33 transitions, 80 flow [2023-11-29 06:15:05,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 30 transitions, 72 flow [2023-11-29 06:15:05,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:15:05,464 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;@28d49729, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:15:05,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-29 06:15:05,467 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:15:05,468 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:15:05,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:15:05,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:05,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:15:05,469 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)] === [2023-11-29 06:15:05,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash 7971, now seen corresponding path program 1 times [2023-11-29 06:15:05,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:05,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542565214] [2023-11-29 06:15:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:05,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:05,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542565214] [2023-11-29 06:15:05,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542565214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:05,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:05,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:15:05,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783090544] [2023-11-29 06:15:05,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:05,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:15:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:15:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:15:05,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 33 [2023-11-29 06:15:05,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 72 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) [2023-11-29 06:15:05,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:05,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 33 [2023-11-29 06:15:05,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:05,868 INFO L124 PetriNetUnfolderBase]: 68/134 cut-off events. [2023-11-29 06:15:05,868 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 06:15:05,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 134 events. 68/134 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 368 event pairs, 29 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 207. Up to 105 conditions per place. [2023-11-29 06:15:05,872 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-29 06:15:05,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 92 flow [2023-11-29 06:15:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:15:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:15:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-29 06:15:05,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2023-11-29 06:15:05,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-29 06:15:05,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-29 06:15:05,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:05,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-29 06:15:05,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:05,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:05,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:05,897 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 72 flow. Second operand 3 states and 62 transitions. [2023-11-29 06:15:05,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 92 flow [2023-11-29 06:15:05,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:15:05,902 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2023-11-29 06:15:05,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-11-29 06:15:05,909 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-11-29 06:15:05,909 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2023-11-29 06:15:05,909 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) [2023-11-29 06:15:05,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:05,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:15:05,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:15:05,910 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)] === [2023-11-29 06:15:05,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash 7972, now seen corresponding path program 1 times [2023-11-29 06:15:05,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:05,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937127411] [2023-11-29 06:15:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:06,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937127411] [2023-11-29 06:15:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937127411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:06,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:06,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:15:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704583024] [2023-11-29 06:15:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:06,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:15:06,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:15:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:15:06,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 33 [2023-11-29 06:15:06,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 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) [2023-11-29 06:15:06,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:06,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 33 [2023-11-29 06:15:06,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:06,117 INFO L124 PetriNetUnfolderBase]: 44/96 cut-off events. [2023-11-29 06:15:06,117 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 06:15:06,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 96 events. 44/96 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 237 event pairs, 17 based on Foata normal form. 10/72 useless extension candidates. Maximal degree in co-relation 169. Up to 71 conditions per place. [2023-11-29 06:15:06,119 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 11 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-29 06:15:06,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 78 flow [2023-11-29 06:15:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:15:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:15:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 06:15:06,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-29 06:15:06,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 06:15:06,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 06:15:06,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:06,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 06:15:06,123 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) [2023-11-29 06:15:06,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,124 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 65 transitions. [2023-11-29 06:15:06,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 78 flow [2023-11-29 06:15:06,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 77 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:06,126 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 55 flow [2023-11-29 06:15:06,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-29 06:15:06,128 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-11-29 06:15:06,128 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 55 flow [2023-11-29 06:15:06,128 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) [2023-11-29 06:15:06,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:06,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:15:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:15:06,129 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)] === [2023-11-29 06:15:06,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:06,130 INFO L85 PathProgramCache]: Analyzing trace with hash 237663588, now seen corresponding path program 1 times [2023-11-29 06:15:06,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:06,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000718819] [2023-11-29 06:15:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:06,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:06,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:06,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000718819] [2023-11-29 06:15:06,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000718819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:06,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:06,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:15:06,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027210742] [2023-11-29 06:15:06,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:06,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:15:06,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:15:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:15:06,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 33 [2023-11-29 06:15:06,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 55 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) [2023-11-29 06:15:06,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:06,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 33 [2023-11-29 06:15:06,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:06,278 INFO L124 PetriNetUnfolderBase]: 48/98 cut-off events. [2023-11-29 06:15:06,278 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:15:06,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 98 events. 48/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 239 event pairs, 20 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 180. Up to 80 conditions per place. [2023-11-29 06:15:06,280 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 13 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-29 06:15:06,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 79 flow [2023-11-29 06:15:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:15:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:15:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-29 06:15:06,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2023-11-29 06:15:06,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-29 06:15:06,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-29 06:15:06,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:06,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-29 06:15:06,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,284 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 55 flow. Second operand 3 states and 61 transitions. [2023-11-29 06:15:06,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 79 flow [2023-11-29 06:15:06,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:06,286 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 52 flow [2023-11-29 06:15:06,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-29 06:15:06,287 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -8 predicate places. [2023-11-29 06:15:06,287 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 52 flow [2023-11-29 06:15:06,287 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) [2023-11-29 06:15:06,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:06,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:15:06,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:15:06,288 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)] === [2023-11-29 06:15:06,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash 237663589, now seen corresponding path program 1 times [2023-11-29 06:15:06,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:06,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678358340] [2023-11-29 06:15:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:06,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:06,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678358340] [2023-11-29 06:15:06,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678358340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:06,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:06,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:15:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16156418] [2023-11-29 06:15:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:15:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:15:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:15:06,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 33 [2023-11-29 06:15:06,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 52 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) [2023-11-29 06:15:06,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:06,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 33 [2023-11-29 06:15:06,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:06,423 INFO L124 PetriNetUnfolderBase]: 44/88 cut-off events. [2023-11-29 06:15:06,423 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 06:15:06,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 88 events. 44/88 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 202 event pairs, 17 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 161. Up to 71 conditions per place. [2023-11-29 06:15:06,425 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-29 06:15:06,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 72 flow [2023-11-29 06:15:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:15:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:15:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 06:15:06,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-29 06:15:06,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 06:15:06,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 06:15:06,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:06,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 06:15:06,428 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) [2023-11-29 06:15:06,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,429 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 52 flow. Second operand 3 states and 65 transitions. [2023-11-29 06:15:06,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 72 flow [2023-11-29 06:15:06,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:06,430 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 49 flow [2023-11-29 06:15:06,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-29 06:15:06,431 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -9 predicate places. [2023-11-29 06:15:06,432 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 49 flow [2023-11-29 06:15:06,432 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) [2023-11-29 06:15:06,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:06,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:06,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:15:06,432 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)] === [2023-11-29 06:15:06,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -227580784, now seen corresponding path program 1 times [2023-11-29 06:15:06,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:06,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911542108] [2023-11-29 06:15:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:06,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:06,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911542108] [2023-11-29 06:15:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911542108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:06,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:06,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:15:06,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378545441] [2023-11-29 06:15:06,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:06,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:15:06,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:15:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:15:06,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:06,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:06,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:06,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:06,557 INFO L124 PetriNetUnfolderBase]: 59/121 cut-off events. [2023-11-29 06:15:06,558 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 06:15:06,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 121 events. 59/121 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 8 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 224. Up to 77 conditions per place. [2023-11-29 06:15:06,559 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 17 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-29 06:15:06,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 112 flow [2023-11-29 06:15:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:15:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:15:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-29 06:15:06,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2023-11-29 06:15:06,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-29 06:15:06,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-29 06:15:06,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:06,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-29 06:15:06,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,564 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 49 flow. Second operand 3 states and 79 transitions. [2023-11-29 06:15:06,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 112 flow [2023-11-29 06:15:06,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:06,566 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 67 flow [2023-11-29 06:15:06,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-29 06:15:06,567 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-11-29 06:15:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 67 flow [2023-11-29 06:15:06,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:06,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:06,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:15:06,568 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)] === [2023-11-29 06:15:06,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1340333048, now seen corresponding path program 1 times [2023-11-29 06:15:06,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:06,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561360628] [2023-11-29 06:15:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:06,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:06,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:06,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561360628] [2023-11-29 06:15:06,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561360628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:06,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:06,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:15:06,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110578394] [2023-11-29 06:15:06,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:06,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:15:06,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:15:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:15:06,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:06,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:06,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:06,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:06,723 INFO L124 PetriNetUnfolderBase]: 62/137 cut-off events. [2023-11-29 06:15:06,723 INFO L125 PetriNetUnfolderBase]: For 36/37 co-relation queries the response was YES. [2023-11-29 06:15:06,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 137 events. 62/137 cut-off events. For 36/37 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 413 event pairs, 6 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 300. Up to 56 conditions per place. [2023-11-29 06:15:06,726 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-11-29 06:15:06,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 183 flow [2023-11-29 06:15:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:15:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:15:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2023-11-29 06:15:06,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2023-11-29 06:15:06,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 125 transitions. [2023-11-29 06:15:06,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 125 transitions. [2023-11-29 06:15:06,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:06,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 125 transitions. [2023-11-29 06:15:06,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,731 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,731 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 67 flow. Second operand 5 states and 125 transitions. [2023-11-29 06:15:06,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 183 flow [2023-11-29 06:15:06,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:06,734 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 120 flow [2023-11-29 06:15:06,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-29 06:15:06,735 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2023-11-29 06:15:06,735 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 120 flow [2023-11-29 06:15:06,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:06,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:06,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:15:06,736 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)] === [2023-11-29 06:15:06,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash 49518318, now seen corresponding path program 2 times [2023-11-29 06:15:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621235714] [2023-11-29 06:15:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:06,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:06,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:06,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621235714] [2023-11-29 06:15:06,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621235714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579086935] [2023-11-29 06:15:06,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:06,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:06,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:06,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:06,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:15:06,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:06,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:06,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:15:06,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579086935] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:07,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:15:07,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-29 06:15:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647790653] [2023-11-29 06:15:07,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:15:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:15:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:15:07,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:07,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:07,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:07,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:07,155 INFO L124 PetriNetUnfolderBase]: 56/129 cut-off events. [2023-11-29 06:15:07,155 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-11-29 06:15:07,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 129 events. 56/129 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 401 event pairs, 8 based on Foata normal form. 5/134 useless extension candidates. Maximal degree in co-relation 371. Up to 46 conditions per place. [2023-11-29 06:15:07,158 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 22 selfloop transitions, 8 changer transitions 2/40 dead transitions. [2023-11-29 06:15:07,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 230 flow [2023-11-29 06:15:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:15:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:15:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2023-11-29 06:15:07,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2023-11-29 06:15:07,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2023-11-29 06:15:07,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2023-11-29 06:15:07,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:07,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2023-11-29 06:15:07,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,162 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 120 flow. Second operand 4 states and 104 transitions. [2023-11-29 06:15:07,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 230 flow [2023-11-29 06:15:07,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:15:07,166 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 141 flow [2023-11-29 06:15:07,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-11-29 06:15:07,167 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-11-29 06:15:07,167 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 141 flow [2023-11-29 06:15:07,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:07,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:07,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:07,369 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)] === [2023-11-29 06:15:07,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1771955891, now seen corresponding path program 1 times [2023-11-29 06:15:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:07,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169482533] [2023-11-29 06:15:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169482533] [2023-11-29 06:15:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169482533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:07,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:07,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:15:07,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878317480] [2023-11-29 06:15:07,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:07,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:15:07,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:07,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:15:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:15:07,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:07,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:07,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:07,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:07,547 INFO L124 PetriNetUnfolderBase]: 54/134 cut-off events. [2023-11-29 06:15:07,547 INFO L125 PetriNetUnfolderBase]: For 248/250 co-relation queries the response was YES. [2023-11-29 06:15:07,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 134 events. 54/134 cut-off events. For 248/250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 432 event pairs, 4 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 432. Up to 44 conditions per place. [2023-11-29 06:15:07,550 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 29 selfloop transitions, 7 changer transitions 3/47 dead transitions. [2023-11-29 06:15:07,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 307 flow [2023-11-29 06:15:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:15:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:15:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-29 06:15:07,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7757575757575758 [2023-11-29 06:15:07,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-29 06:15:07,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-29 06:15:07,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:07,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-29 06:15:07,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,554 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,554 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 141 flow. Second operand 5 states and 128 transitions. [2023-11-29 06:15:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 307 flow [2023-11-29 06:15:07,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 275 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 06:15:07,558 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 175 flow [2023-11-29 06:15:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-29 06:15:07,559 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-11-29 06:15:07,559 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 175 flow [2023-11-29 06:15:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:07,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:07,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:15:07,560 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)] === [2023-11-29 06:15:07,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash 867114887, now seen corresponding path program 2 times [2023-11-29 06:15:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:07,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270813299] [2023-11-29 06:15:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270813299] [2023-11-29 06:15:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270813299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:07,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:15:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:15:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212825150] [2023-11-29 06:15:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:07,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:15:07,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:15:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:15:07,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:07,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:07,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:07,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:07,690 INFO L124 PetriNetUnfolderBase]: 43/106 cut-off events. [2023-11-29 06:15:07,690 INFO L125 PetriNetUnfolderBase]: For 181/182 co-relation queries the response was YES. [2023-11-29 06:15:07,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 106 events. 43/106 cut-off events. For 181/182 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 263 event pairs, 5 based on Foata normal form. 4/110 useless extension candidates. Maximal degree in co-relation 376. Up to 76 conditions per place. [2023-11-29 06:15:07,692 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 22 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-29 06:15:07,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 35 transitions, 239 flow [2023-11-29 06:15:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:15:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:15:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2023-11-29 06:15:07,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2023-11-29 06:15:07,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 98 transitions. [2023-11-29 06:15:07,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 98 transitions. [2023-11-29 06:15:07,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:07,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 98 transitions. [2023-11-29 06:15:07,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,696 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 175 flow. Second operand 4 states and 98 transitions. [2023-11-29 06:15:07,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 35 transitions, 239 flow [2023-11-29 06:15:07,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 35 transitions, 233 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:07,699 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 177 flow [2023-11-29 06:15:07,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-11-29 06:15:07,700 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2023-11-29 06:15:07,701 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 177 flow [2023-11-29 06:15:07,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:07,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:07,701 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] [2023-11-29 06:15:07,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:15:07,701 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)] === [2023-11-29 06:15:07,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2069000065, now seen corresponding path program 1 times [2023-11-29 06:15:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:07,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327938943] [2023-11-29 06:15:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:07,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:07,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327938943] [2023-11-29 06:15:07,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327938943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:07,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972929731] [2023-11-29 06:15:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:07,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:07,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:07,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:07,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:15:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:07,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:15:07,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:08,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972929731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:08,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:08,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 9 [2023-11-29 06:15:08,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570004937] [2023-11-29 06:15:08,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:15:08,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:15:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:15:08,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:08,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 22.4) internal successors, (224), 10 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:08,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:08,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:08,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:08,294 INFO L124 PetriNetUnfolderBase]: 107/245 cut-off events. [2023-11-29 06:15:08,294 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-29 06:15:08,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 245 events. 107/245 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 975 event pairs, 6 based on Foata normal form. 12/257 useless extension candidates. Maximal degree in co-relation 943. Up to 85 conditions per place. [2023-11-29 06:15:08,298 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 41 selfloop transitions, 20 changer transitions 1/70 dead transitions. [2023-11-29 06:15:08,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 539 flow [2023-11-29 06:15:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:15:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:15:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2023-11-29 06:15:08,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2023-11-29 06:15:08,300 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 182 transitions. [2023-11-29 06:15:08,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 182 transitions. [2023-11-29 06:15:08,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:08,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 182 transitions. [2023-11-29 06:15:08,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:08,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:08,302 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:08,302 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 177 flow. Second operand 7 states and 182 transitions. [2023-11-29 06:15:08,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 539 flow [2023-11-29 06:15:08,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 516 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 06:15:08,307 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 384 flow [2023-11-29 06:15:08,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-29 06:15:08,308 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2023-11-29 06:15:08,308 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 384 flow [2023-11-29 06:15:08,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.4) internal successors, (224), 10 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:08,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:08,309 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] [2023-11-29 06:15:08,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:15:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:15:08,511 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)] === [2023-11-29 06:15:08,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1330550605, now seen corresponding path program 2 times [2023-11-29 06:15:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:08,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154841485] [2023-11-29 06:15:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154841485] [2023-11-29 06:15:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154841485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889113090] [2023-11-29 06:15:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:08,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:08,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:08,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:15:08,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:08,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:15:08,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:08,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889113090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:08,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:08,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-29 06:15:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887422175] [2023-11-29 06:15:08,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:15:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:15:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:15:08,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:08,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 384 flow. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:08,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:08,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:08,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:09,048 INFO L124 PetriNetUnfolderBase]: 153/348 cut-off events. [2023-11-29 06:15:09,048 INFO L125 PetriNetUnfolderBase]: For 1275/1284 co-relation queries the response was YES. [2023-11-29 06:15:09,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 348 events. 153/348 cut-off events. For 1275/1284 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1584 event pairs, 14 based on Foata normal form. 8/355 useless extension candidates. Maximal degree in co-relation 1588. Up to 209 conditions per place. [2023-11-29 06:15:09,054 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 52 selfloop transitions, 17 changer transitions 1/78 dead transitions. [2023-11-29 06:15:09,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 752 flow [2023-11-29 06:15:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:15:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:15:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2023-11-29 06:15:09,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7828282828282829 [2023-11-29 06:15:09,055 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 155 transitions. [2023-11-29 06:15:09,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 155 transitions. [2023-11-29 06:15:09,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:09,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 155 transitions. [2023-11-29 06:15:09,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,058 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,058 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 384 flow. Second operand 6 states and 155 transitions. [2023-11-29 06:15:09,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 752 flow [2023-11-29 06:15:09,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 707 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:09,068 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 526 flow [2023-11-29 06:15:09,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-11-29 06:15:09,069 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 25 predicate places. [2023-11-29 06:15:09,069 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 526 flow [2023-11-29 06:15:09,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:09,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:09,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:09,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:15:09,271 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)] === [2023-11-29 06:15:09,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:09,271 INFO L85 PathProgramCache]: Analyzing trace with hash 14385800, now seen corresponding path program 3 times [2023-11-29 06:15:09,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:09,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578212171] [2023-11-29 06:15:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:09,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:09,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:09,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578212171] [2023-11-29 06:15:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578212171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:09,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267966809] [2023-11-29 06:15:09,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:15:09,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:09,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:09,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:15:09,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:15:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:09,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:09,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:09,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:09,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267966809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:09,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:09,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 06:15:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187809895] [2023-11-29 06:15:09,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:15:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:15:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:15:09,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:09,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 526 flow. Second operand has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:09,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:09,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:09,792 INFO L124 PetriNetUnfolderBase]: 168/410 cut-off events. [2023-11-29 06:15:09,793 INFO L125 PetriNetUnfolderBase]: For 2177/2197 co-relation queries the response was YES. [2023-11-29 06:15:09,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 410 events. 168/410 cut-off events. For 2177/2197 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2110 event pairs, 2 based on Foata normal form. 23/432 useless extension candidates. Maximal degree in co-relation 1935. Up to 148 conditions per place. [2023-11-29 06:15:09,797 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 56 selfloop transitions, 30 changer transitions 7/101 dead transitions. [2023-11-29 06:15:09,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 1051 flow [2023-11-29 06:15:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:15:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:15:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2023-11-29 06:15:09,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7542087542087542 [2023-11-29 06:15:09,799 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 224 transitions. [2023-11-29 06:15:09,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 224 transitions. [2023-11-29 06:15:09,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:09,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 224 transitions. [2023-11-29 06:15:09,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.88888888888889) internal successors, (224), 9 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,801 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,801 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 526 flow. Second operand 9 states and 224 transitions. [2023-11-29 06:15:09,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 1051 flow [2023-11-29 06:15:09,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 1016 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:09,812 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 781 flow [2023-11-29 06:15:09,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=781, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-11-29 06:15:09,813 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 37 predicate places. [2023-11-29 06:15:09,813 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 781 flow [2023-11-29 06:15:09,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:09,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:09,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:09,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:15:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:15:10,015 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)] === [2023-11-29 06:15:10,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1642630654, now seen corresponding path program 4 times [2023-11-29 06:15:10,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:10,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490448506] [2023-11-29 06:15:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:10,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490448506] [2023-11-29 06:15:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490448506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147186229] [2023-11-29 06:15:10,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:15:10,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:10,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:10,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:15:10,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:15:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:10,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:10,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:10,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147186229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:10,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:10,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-29 06:15:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108880774] [2023-11-29 06:15:10,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:10,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:15:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:15:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:10,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:10,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 781 flow. Second operand has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:10,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:10,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:10,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:10,537 INFO L124 PetriNetUnfolderBase]: 165/424 cut-off events. [2023-11-29 06:15:10,537 INFO L125 PetriNetUnfolderBase]: For 3085/3095 co-relation queries the response was YES. [2023-11-29 06:15:10,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 424 events. 165/424 cut-off events. For 3085/3095 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2237 event pairs, 4 based on Foata normal form. 9/432 useless extension candidates. Maximal degree in co-relation 2258. Up to 107 conditions per place. [2023-11-29 06:15:10,545 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 58 selfloop transitions, 45 changer transitions 0/111 dead transitions. [2023-11-29 06:15:10,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 1308 flow [2023-11-29 06:15:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:15:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:15:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2023-11-29 06:15:10,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7465564738292011 [2023-11-29 06:15:10,548 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 271 transitions. [2023-11-29 06:15:10,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 271 transitions. [2023-11-29 06:15:10,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:10,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 271 transitions. [2023-11-29 06:15:10,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 24.636363636363637) internal successors, (271), 11 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:10,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:10,551 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:10,551 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 781 flow. Second operand 11 states and 271 transitions. [2023-11-29 06:15:10,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 1308 flow [2023-11-29 06:15:10,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 1215 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:10,571 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 1003 flow [2023-11-29 06:15:10,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1003, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2023-11-29 06:15:10,572 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 50 predicate places. [2023-11-29 06:15:10,572 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 1003 flow [2023-11-29 06:15:10,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:10,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:10,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:10,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:15:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:15:10,779 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)] === [2023-11-29 06:15:10,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 502832263, now seen corresponding path program 5 times [2023-11-29 06:15:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:10,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432579807] [2023-11-29 06:15:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:10,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432579807] [2023-11-29 06:15:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432579807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155927675] [2023-11-29 06:15:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:15:10,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:10,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:10,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:10,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:15:10,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:15:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:10,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:10,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:11,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:11,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155927675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:11,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:11,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-29 06:15:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225801975] [2023-11-29 06:15:11,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:15:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:15:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:11,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:11,257 INFO L124 PetriNetUnfolderBase]: 155/390 cut-off events. [2023-11-29 06:15:11,257 INFO L125 PetriNetUnfolderBase]: For 3221/3221 co-relation queries the response was YES. [2023-11-29 06:15:11,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 conditions, 390 events. 155/390 cut-off events. For 3221/3221 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1949 event pairs, 2 based on Foata normal form. 4/394 useless extension candidates. Maximal degree in co-relation 2168. Up to 109 conditions per place. [2023-11-29 06:15:11,263 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 66 selfloop transitions, 25 changer transitions 6/105 dead transitions. [2023-11-29 06:15:11,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 105 transitions, 1399 flow [2023-11-29 06:15:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:15:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:15:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2023-11-29 06:15:11,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7242424242424242 [2023-11-29 06:15:11,265 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 239 transitions. [2023-11-29 06:15:11,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 239 transitions. [2023-11-29 06:15:11,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 239 transitions. [2023-11-29 06:15:11,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.9) internal successors, (239), 10 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:11,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:11,267 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:11,267 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 1003 flow. Second operand 10 states and 239 transitions. [2023-11-29 06:15:11,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 105 transitions, 1399 flow [2023-11-29 06:15:11,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 105 transitions, 1296 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-11-29 06:15:11,285 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 967 flow [2023-11-29 06:15:11,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=967, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2023-11-29 06:15:11,285 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 56 predicate places. [2023-11-29 06:15:11,285 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 967 flow [2023-11-29 06:15:11,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:11,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:11,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:11,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:15:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:15:11,487 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)] === [2023-11-29 06:15:11,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -703104304, now seen corresponding path program 6 times [2023-11-29 06:15:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:11,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387212773] [2023-11-29 06:15:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:11,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:11,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387212773] [2023-11-29 06:15:11,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387212773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779577480] [2023-11-29 06:15:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:15:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:11,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:11,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:15:11,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:15:11,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:11,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:11,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:11,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:11,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779577480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:11,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:11,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 06:15:11,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352603751] [2023-11-29 06:15:11,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:11,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:15:11,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:15:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:11,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:11,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 967 flow. Second operand has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:11,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:11,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:11,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:12,050 INFO L124 PetriNetUnfolderBase]: 179/432 cut-off events. [2023-11-29 06:15:12,050 INFO L125 PetriNetUnfolderBase]: For 3725/3735 co-relation queries the response was YES. [2023-11-29 06:15:12,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 432 events. 179/432 cut-off events. For 3725/3735 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2143 event pairs, 5 based on Foata normal form. 16/448 useless extension candidates. Maximal degree in co-relation 2450. Up to 171 conditions per place. [2023-11-29 06:15:12,055 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 70 selfloop transitions, 48 changer transitions 0/126 dead transitions. [2023-11-29 06:15:12,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 126 transitions, 1698 flow [2023-11-29 06:15:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:15:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:15:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2023-11-29 06:15:12,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297979797979798 [2023-11-29 06:15:12,057 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 289 transitions. [2023-11-29 06:15:12,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 289 transitions. [2023-11-29 06:15:12,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:12,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 289 transitions. [2023-11-29 06:15:12,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 24.083333333333332) internal successors, (289), 12 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,060 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,060 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 967 flow. Second operand 12 states and 289 transitions. [2023-11-29 06:15:12,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 126 transitions, 1698 flow [2023-11-29 06:15:12,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 126 transitions, 1548 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-11-29 06:15:12,075 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 1353 flow [2023-11-29 06:15:12,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1353, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-11-29 06:15:12,076 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 67 predicate places. [2023-11-29 06:15:12,076 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 1353 flow [2023-11-29 06:15:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:12,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:12,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:15:12,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:15:12,278 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)] === [2023-11-29 06:15:12,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash -123964417, now seen corresponding path program 7 times [2023-11-29 06:15:12,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:12,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023007898] [2023-11-29 06:15:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023007898] [2023-11-29 06:15:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023007898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682107044] [2023-11-29 06:15:12,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:15:12,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:12,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:12,337 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:12,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:15:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:12,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:12,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:12,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:12,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682107044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:12,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:12,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-29 06:15:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7559049] [2023-11-29 06:15:12,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:12,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:15:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:15:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:12,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:12,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 1353 flow. Second operand has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:12,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:12,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:12,787 INFO L124 PetriNetUnfolderBase]: 235/586 cut-off events. [2023-11-29 06:15:12,787 INFO L125 PetriNetUnfolderBase]: For 5127/5134 co-relation queries the response was YES. [2023-11-29 06:15:12,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3500 conditions, 586 events. 235/586 cut-off events. For 5127/5134 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3305 event pairs, 4 based on Foata normal form. 11/597 useless extension candidates. Maximal degree in co-relation 3454. Up to 150 conditions per place. [2023-11-29 06:15:12,793 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 96 selfloop transitions, 63 changer transitions 2/169 dead transitions. [2023-11-29 06:15:12,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 169 transitions, 2357 flow [2023-11-29 06:15:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:15:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:15:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2023-11-29 06:15:12,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7548209366391184 [2023-11-29 06:15:12,795 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 274 transitions. [2023-11-29 06:15:12,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 274 transitions. [2023-11-29 06:15:12,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:12,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 274 transitions. [2023-11-29 06:15:12,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 24.90909090909091) internal successors, (274), 11 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,797 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,798 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 1353 flow. Second operand 11 states and 274 transitions. [2023-11-29 06:15:12,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 169 transitions, 2357 flow [2023-11-29 06:15:12,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 169 transitions, 2229 flow, removed 58 selfloop flow, removed 3 redundant places. [2023-11-29 06:15:12,817 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1924 flow [2023-11-29 06:15:12,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1924, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2023-11-29 06:15:12,818 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 79 predicate places. [2023-11-29 06:15:12,819 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1924 flow [2023-11-29 06:15:12,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:12,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:12,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:12,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:13,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:15:13,020 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)] === [2023-11-29 06:15:13,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -906454053, now seen corresponding path program 8 times [2023-11-29 06:15:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128622192] [2023-11-29 06:15:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:13,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128622192] [2023-11-29 06:15:13,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128622192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:13,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055734961] [2023-11-29 06:15:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:13,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:13,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:15:13,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:13,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:13,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:13,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:13,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:13,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055734961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:13,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:13,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 06:15:13,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273514684] [2023-11-29 06:15:13,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:13,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:15:13,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:13,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:15:13,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:15:13,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:13,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1924 flow. Second operand has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:13,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:13,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:13,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:13,468 INFO L124 PetriNetUnfolderBase]: 222/555 cut-off events. [2023-11-29 06:15:13,468 INFO L125 PetriNetUnfolderBase]: For 5901/5914 co-relation queries the response was YES. [2023-11-29 06:15:13,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 555 events. 222/555 cut-off events. For 5901/5914 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3047 event pairs, 11 based on Foata normal form. 8/562 useless extension candidates. Maximal degree in co-relation 3542. Up to 166 conditions per place. [2023-11-29 06:15:13,475 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 94 selfloop transitions, 45 changer transitions 6/153 dead transitions. [2023-11-29 06:15:13,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 153 transitions, 2440 flow [2023-11-29 06:15:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:15:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:15:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2023-11-29 06:15:13,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2023-11-29 06:15:13,477 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 220 transitions. [2023-11-29 06:15:13,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 220 transitions. [2023-11-29 06:15:13,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:13,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 220 transitions. [2023-11-29 06:15:13,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.444444444444443) internal successors, (220), 9 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:13,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:13,479 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:13,480 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1924 flow. Second operand 9 states and 220 transitions. [2023-11-29 06:15:13,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 153 transitions, 2440 flow [2023-11-29 06:15:13,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 2275 flow, removed 81 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:13,507 INFO L231 Difference]: Finished difference. Result has 123 places, 125 transitions, 1878 flow [2023-11-29 06:15:13,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1878, PETRI_PLACES=123, PETRI_TRANSITIONS=125} [2023-11-29 06:15:13,508 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 88 predicate places. [2023-11-29 06:15:13,508 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 125 transitions, 1878 flow [2023-11-29 06:15:13,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:13,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:13,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:13,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:13,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:13,711 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)] === [2023-11-29 06:15:13,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 901669422, now seen corresponding path program 9 times [2023-11-29 06:15:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:13,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355891958] [2023-11-29 06:15:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355891958] [2023-11-29 06:15:13,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355891958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670268195] [2023-11-29 06:15:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:15:13,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:13,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:13,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:15:13,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:15:13,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:13,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:15:13,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:13,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:14,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670268195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:14,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:14,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-29 06:15:14,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349026258] [2023-11-29 06:15:14,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:14,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:15:14,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:15:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:14,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:14,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 125 transitions, 1878 flow. Second operand has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:14,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:14,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:14,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:14,240 INFO L124 PetriNetUnfolderBase]: 206/499 cut-off events. [2023-11-29 06:15:14,240 INFO L125 PetriNetUnfolderBase]: For 5535/5547 co-relation queries the response was YES. [2023-11-29 06:15:14,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3313 conditions, 499 events. 206/499 cut-off events. For 5535/5547 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2618 event pairs, 7 based on Foata normal form. 14/513 useless extension candidates. Maximal degree in co-relation 3259. Up to 182 conditions per place. [2023-11-29 06:15:14,248 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 90 selfloop transitions, 41 changer transitions 1/140 dead transitions. [2023-11-29 06:15:14,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 140 transitions, 2237 flow [2023-11-29 06:15:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:15:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:15:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2023-11-29 06:15:14,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7151515151515152 [2023-11-29 06:15:14,250 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 236 transitions. [2023-11-29 06:15:14,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 236 transitions. [2023-11-29 06:15:14,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:14,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 236 transitions. [2023-11-29 06:15:14,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.6) internal successors, (236), 10 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:14,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:14,253 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:14,253 INFO L175 Difference]: Start difference. First operand has 123 places, 125 transitions, 1878 flow. Second operand 10 states and 236 transitions. [2023-11-29 06:15:14,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 140 transitions, 2237 flow [2023-11-29 06:15:14,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 140 transitions, 2173 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-29 06:15:14,290 INFO L231 Difference]: Finished difference. Result has 129 places, 121 transitions, 1834 flow [2023-11-29 06:15:14,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1834, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2023-11-29 06:15:14,291 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 94 predicate places. [2023-11-29 06:15:14,291 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 1834 flow [2023-11-29 06:15:14,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.636363636363637) internal successors, (238), 11 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:14,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:14,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:14,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:14,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:15:14,497 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)] === [2023-11-29 06:15:14,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1184757196, now seen corresponding path program 10 times [2023-11-29 06:15:14,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:14,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493208354] [2023-11-29 06:15:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:14,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493208354] [2023-11-29 06:15:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493208354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:14,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684370358] [2023-11-29 06:15:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:15:14,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:14,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:14,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:15:14,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:15:14,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:14,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:15:14,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:14,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:14,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684370358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:14,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:14,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2023-11-29 06:15:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810134655] [2023-11-29 06:15:14,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:15:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:15:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:15:14,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:14,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 1834 flow. Second operand has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:14,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:14,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:14,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:15,204 INFO L124 PetriNetUnfolderBase]: 319/757 cut-off events. [2023-11-29 06:15:15,204 INFO L125 PetriNetUnfolderBase]: For 11216/11221 co-relation queries the response was YES. [2023-11-29 06:15:15,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5121 conditions, 757 events. 319/757 cut-off events. For 11216/11221 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4431 event pairs, 15 based on Foata normal form. 30/787 useless extension candidates. Maximal degree in co-relation 5065. Up to 362 conditions per place. [2023-11-29 06:15:15,216 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 132 selfloop transitions, 55 changer transitions 3/198 dead transitions. [2023-11-29 06:15:15,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 198 transitions, 3214 flow [2023-11-29 06:15:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:15:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:15:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2023-11-29 06:15:15,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7818181818181819 [2023-11-29 06:15:15,218 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 258 transitions. [2023-11-29 06:15:15,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 258 transitions. [2023-11-29 06:15:15,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:15,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 258 transitions. [2023-11-29 06:15:15,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.8) internal successors, (258), 10 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:15,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:15,221 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:15,221 INFO L175 Difference]: Start difference. First operand has 129 places, 121 transitions, 1834 flow. Second operand 10 states and 258 transitions. [2023-11-29 06:15:15,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 198 transitions, 3214 flow [2023-11-29 06:15:15,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 3122 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-29 06:15:15,271 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 2616 flow [2023-11-29 06:15:15,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2616, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2023-11-29 06:15:15,271 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 105 predicate places. [2023-11-29 06:15:15,272 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 2616 flow [2023-11-29 06:15:15,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:15,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:15,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:15,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:15:15,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:15,473 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:15,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1533387314, now seen corresponding path program 11 times [2023-11-29 06:15:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:15,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184731826] [2023-11-29 06:15:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:15,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184731826] [2023-11-29 06:15:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184731826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68660106] [2023-11-29 06:15:15,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:15:15,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:15,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:15,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:15,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:15:15,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:15:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:15,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:15:15,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:15,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:15,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68660106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:15,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:15,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2023-11-29 06:15:15,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516389328] [2023-11-29 06:15:15,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:15:15,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:15:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:15,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:15,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 2616 flow. Second operand has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:15,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:15,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:15,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:16,152 INFO L124 PetriNetUnfolderBase]: 480/1121 cut-off events. [2023-11-29 06:15:16,153 INFO L125 PetriNetUnfolderBase]: For 19794/19804 co-relation queries the response was YES. [2023-11-29 06:15:16,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8415 conditions, 1121 events. 480/1121 cut-off events. For 19794/19804 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7336 event pairs, 31 based on Foata normal form. 20/1141 useless extension candidates. Maximal degree in co-relation 8354. Up to 621 conditions per place. [2023-11-29 06:15:16,168 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 173 selfloop transitions, 79 changer transitions 7/267 dead transitions. [2023-11-29 06:15:16,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 267 transitions, 4932 flow [2023-11-29 06:15:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:15:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:15:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 281 transitions. [2023-11-29 06:15:16,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7741046831955923 [2023-11-29 06:15:16,170 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 281 transitions. [2023-11-29 06:15:16,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 281 transitions. [2023-11-29 06:15:16,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:16,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 281 transitions. [2023-11-29 06:15:16,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 25.545454545454547) internal successors, (281), 11 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:16,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:16,173 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:16,173 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 2616 flow. Second operand 11 states and 281 transitions. [2023-11-29 06:15:16,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 267 transitions, 4932 flow [2023-11-29 06:15:16,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 267 transitions, 4743 flow, removed 91 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:16,246 INFO L231 Difference]: Finished difference. Result has 156 places, 221 transitions, 4115 flow [2023-11-29 06:15:16,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4115, PETRI_PLACES=156, PETRI_TRANSITIONS=221} [2023-11-29 06:15:16,247 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 121 predicate places. [2023-11-29 06:15:16,247 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 221 transitions, 4115 flow [2023-11-29 06:15:16,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.727272727272727) internal successors, (239), 11 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:16,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:16,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:16,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:16,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:16,448 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:16,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1391160074, now seen corresponding path program 12 times [2023-11-29 06:15:16,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:16,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934721162] [2023-11-29 06:15:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:16,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934721162] [2023-11-29 06:15:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934721162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:16,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013389721] [2023-11-29 06:15:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:15:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:16,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:16,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:15:16,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:15:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:16,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:15:16,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:16,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013389721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:16,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2023-11-29 06:15:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745301503] [2023-11-29 06:15:16,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:15:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:15:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:15:16,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:16,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 221 transitions, 4115 flow. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:16,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:16,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:17,322 INFO L124 PetriNetUnfolderBase]: 577/1294 cut-off events. [2023-11-29 06:15:17,322 INFO L125 PetriNetUnfolderBase]: For 30595/30606 co-relation queries the response was YES. [2023-11-29 06:15:17,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10641 conditions, 1294 events. 577/1294 cut-off events. For 30595/30606 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8524 event pairs, 46 based on Foata normal form. 36/1330 useless extension candidates. Maximal degree in co-relation 10572. Up to 877 conditions per place. [2023-11-29 06:15:17,341 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 216 selfloop transitions, 67 changer transitions 5/296 dead transitions. [2023-11-29 06:15:17,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 296 transitions, 5962 flow [2023-11-29 06:15:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:15:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:15:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2023-11-29 06:15:17,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2023-11-29 06:15:17,343 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 252 transitions. [2023-11-29 06:15:17,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 252 transitions. [2023-11-29 06:15:17,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:17,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 252 transitions. [2023-11-29 06:15:17,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.2) internal successors, (252), 10 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:17,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:17,346 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:17,346 INFO L175 Difference]: Start difference. First operand has 156 places, 221 transitions, 4115 flow. Second operand 10 states and 252 transitions. [2023-11-29 06:15:17,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 296 transitions, 5962 flow [2023-11-29 06:15:17,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 296 transitions, 5261 flow, removed 319 selfloop flow, removed 2 redundant places. [2023-11-29 06:15:17,469 INFO L231 Difference]: Finished difference. Result has 168 places, 258 transitions, 4456 flow [2023-11-29 06:15:17,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4456, PETRI_PLACES=168, PETRI_TRANSITIONS=258} [2023-11-29 06:15:17,470 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 133 predicate places. [2023-11-29 06:15:17,470 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 258 transitions, 4456 flow [2023-11-29 06:15:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:17,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:17,471 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:17,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:15:17,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:17,672 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:17,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -776815411, now seen corresponding path program 13 times [2023-11-29 06:15:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115200486] [2023-11-29 06:15:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:17,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:17,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115200486] [2023-11-29 06:15:17,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115200486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:17,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922022137] [2023-11-29 06:15:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:15:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:17,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:17,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:15:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:17,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:17,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:17,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:18,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922022137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:18,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:18,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 06:15:18,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588886119] [2023-11-29 06:15:18,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:18,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:15:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:18,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:15:18,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:15:18,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:18,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 258 transitions, 4456 flow. Second operand has 14 states, 14 states have (on average 21.214285714285715) internal successors, (297), 14 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:18,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:18,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:18,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:18,436 INFO L124 PetriNetUnfolderBase]: 593/1374 cut-off events. [2023-11-29 06:15:18,437 INFO L125 PetriNetUnfolderBase]: For 36264/36284 co-relation queries the response was YES. [2023-11-29 06:15:18,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11059 conditions, 1374 events. 593/1374 cut-off events. For 36264/36284 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9461 event pairs, 9 based on Foata normal form. 46/1420 useless extension candidates. Maximal degree in co-relation 10984. Up to 446 conditions per place. [2023-11-29 06:15:18,454 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 153 selfloop transitions, 152 changer transitions 19/332 dead transitions. [2023-11-29 06:15:18,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 332 transitions, 6433 flow [2023-11-29 06:15:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:15:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:15:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 298 transitions. [2023-11-29 06:15:18,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7525252525252525 [2023-11-29 06:15:18,456 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 298 transitions. [2023-11-29 06:15:18,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 298 transitions. [2023-11-29 06:15:18,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:18,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 298 transitions. [2023-11-29 06:15:18,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:18,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:18,458 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:18,459 INFO L175 Difference]: Start difference. First operand has 168 places, 258 transitions, 4456 flow. Second operand 12 states and 298 transitions. [2023-11-29 06:15:18,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 332 transitions, 6433 flow [2023-11-29 06:15:18,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 332 transitions, 6062 flow, removed 177 selfloop flow, removed 4 redundant places. [2023-11-29 06:15:18,581 INFO L231 Difference]: Finished difference. Result has 181 places, 275 transitions, 5377 flow [2023-11-29 06:15:18,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5377, PETRI_PLACES=181, PETRI_TRANSITIONS=275} [2023-11-29 06:15:18,582 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 146 predicate places. [2023-11-29 06:15:18,582 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 275 transitions, 5377 flow [2023-11-29 06:15:18,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.214285714285715) internal successors, (297), 14 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:18,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:18,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:18,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:15:18,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:18,783 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:18,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash 82144231, now seen corresponding path program 14 times [2023-11-29 06:15:18,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:18,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108700258] [2023-11-29 06:15:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:18,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108700258] [2023-11-29 06:15:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108700258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413493209] [2023-11-29 06:15:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:18,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:18,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:18,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:18,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:15:18,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:18,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:18,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:19,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413493209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:19,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:19,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16081519] [2023-11-29 06:15:19,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:19,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:19,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:19,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 275 transitions, 5377 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:19,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:19,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:19,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:19,657 INFO L124 PetriNetUnfolderBase]: 577/1385 cut-off events. [2023-11-29 06:15:19,657 INFO L125 PetriNetUnfolderBase]: For 39885/39911 co-relation queries the response was YES. [2023-11-29 06:15:19,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11706 conditions, 1385 events. 577/1385 cut-off events. For 39885/39911 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9671 event pairs, 13 based on Foata normal form. 18/1402 useless extension candidates. Maximal degree in co-relation 11627. Up to 253 conditions per place. [2023-11-29 06:15:19,680 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 125 selfloop transitions, 217 changer transitions 1/351 dead transitions. [2023-11-29 06:15:19,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 351 transitions, 7048 flow [2023-11-29 06:15:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:15:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:15:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 457 transitions. [2023-11-29 06:15:19,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7288676236044657 [2023-11-29 06:15:19,682 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 457 transitions. [2023-11-29 06:15:19,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 457 transitions. [2023-11-29 06:15:19,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:19,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 457 transitions. [2023-11-29 06:15:19,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 24.05263157894737) internal successors, (457), 19 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:19,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:19,686 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:19,686 INFO L175 Difference]: Start difference. First operand has 181 places, 275 transitions, 5377 flow. Second operand 19 states and 457 transitions. [2023-11-29 06:15:19,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 351 transitions, 7048 flow [2023-11-29 06:15:19,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 351 transitions, 6583 flow, removed 231 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:19,894 INFO L231 Difference]: Finished difference. Result has 202 places, 296 transitions, 6046 flow [2023-11-29 06:15:19,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4938, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6046, PETRI_PLACES=202, PETRI_TRANSITIONS=296} [2023-11-29 06:15:19,895 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 167 predicate places. [2023-11-29 06:15:19,895 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 296 transitions, 6046 flow [2023-11-29 06:15:19,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:19,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:19,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:19,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:15:20,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:20,096 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:20,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 843149424, now seen corresponding path program 15 times [2023-11-29 06:15:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:20,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753734122] [2023-11-29 06:15:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:20,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:20,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753734122] [2023-11-29 06:15:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753734122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097184] [2023-11-29 06:15:20,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:15:20,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:20,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:15:20,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:15:20,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:20,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:20,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:20,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:20,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097184] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:20,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:20,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366866261] [2023-11-29 06:15:20,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:20,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:20,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:20,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:20,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 296 transitions, 6046 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:20,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:20,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:20,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:20,995 INFO L124 PetriNetUnfolderBase]: 626/1430 cut-off events. [2023-11-29 06:15:20,995 INFO L125 PetriNetUnfolderBase]: For 29327/29342 co-relation queries the response was YES. [2023-11-29 06:15:21,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1430 events. 626/1430 cut-off events. For 29327/29342 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9725 event pairs, 8 based on Foata normal form. 9/1439 useless extension candidates. Maximal degree in co-relation 11756. Up to 515 conditions per place. [2023-11-29 06:15:21,012 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 233 selfloop transitions, 116 changer transitions 12/369 dead transitions. [2023-11-29 06:15:21,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 369 transitions, 8007 flow [2023-11-29 06:15:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:15:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:15:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 423 transitions. [2023-11-29 06:15:21,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7121212121212122 [2023-11-29 06:15:21,014 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 423 transitions. [2023-11-29 06:15:21,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 423 transitions. [2023-11-29 06:15:21,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:21,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 423 transitions. [2023-11-29 06:15:21,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.5) internal successors, (423), 18 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:21,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:21,017 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:21,017 INFO L175 Difference]: Start difference. First operand has 202 places, 296 transitions, 6046 flow. Second operand 18 states and 423 transitions. [2023-11-29 06:15:21,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 369 transitions, 8007 flow [2023-11-29 06:15:21,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 369 transitions, 7644 flow, removed 123 selfloop flow, removed 10 redundant places. [2023-11-29 06:15:21,194 INFO L231 Difference]: Finished difference. Result has 211 places, 319 transitions, 6586 flow [2023-11-29 06:15:21,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6586, PETRI_PLACES=211, PETRI_TRANSITIONS=319} [2023-11-29 06:15:21,195 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2023-11-29 06:15:21,195 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 319 transitions, 6586 flow [2023-11-29 06:15:21,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:21,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:21,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:15:21,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:21,396 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:21,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -797643194, now seen corresponding path program 16 times [2023-11-29 06:15:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:21,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986184624] [2023-11-29 06:15:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:21,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:21,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:21,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986184624] [2023-11-29 06:15:21,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986184624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:21,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890993557] [2023-11-29 06:15:21,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:15:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:21,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:21,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:21,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:15:21,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:15:21,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:21,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:21,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:21,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:21,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890993557] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:21,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:21,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226716672] [2023-11-29 06:15:21,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:21,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:21,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:21,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 319 transitions, 6586 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:21,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:21,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:21,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:22,315 INFO L124 PetriNetUnfolderBase]: 661/1513 cut-off events. [2023-11-29 06:15:22,315 INFO L125 PetriNetUnfolderBase]: For 38104/38118 co-relation queries the response was YES. [2023-11-29 06:15:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12813 conditions, 1513 events. 661/1513 cut-off events. For 38104/38118 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10388 event pairs, 7 based on Foata normal form. 36/1549 useless extension candidates. Maximal degree in co-relation 12727. Up to 383 conditions per place. [2023-11-29 06:15:22,330 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 203 selfloop transitions, 206 changer transitions 4/421 dead transitions. [2023-11-29 06:15:22,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 421 transitions, 9179 flow [2023-11-29 06:15:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:15:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:15:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 506 transitions. [2023-11-29 06:15:22,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7301587301587301 [2023-11-29 06:15:22,332 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 506 transitions. [2023-11-29 06:15:22,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 506 transitions. [2023-11-29 06:15:22,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:22,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 506 transitions. [2023-11-29 06:15:22,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 24.095238095238095) internal successors, (506), 21 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:22,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:22,334 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:22,334 INFO L175 Difference]: Start difference. First operand has 211 places, 319 transitions, 6586 flow. Second operand 21 states and 506 transitions. [2023-11-29 06:15:22,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 421 transitions, 9179 flow [2023-11-29 06:15:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 421 transitions, 8577 flow, removed 235 selfloop flow, removed 4 redundant places. [2023-11-29 06:15:22,505 INFO L231 Difference]: Finished difference. Result has 232 places, 367 transitions, 8187 flow [2023-11-29 06:15:22,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8187, PETRI_PLACES=232, PETRI_TRANSITIONS=367} [2023-11-29 06:15:22,505 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 197 predicate places. [2023-11-29 06:15:22,505 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 367 transitions, 8187 flow [2023-11-29 06:15:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:22,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:22,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:15:22,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:22,706 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:22,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash 550988004, now seen corresponding path program 17 times [2023-11-29 06:15:22,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144514913] [2023-11-29 06:15:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:22,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:22,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144514913] [2023-11-29 06:15:22,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144514913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:22,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874927867] [2023-11-29 06:15:22,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:15:22,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:22,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:22,767 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:22,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:15:22,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:15:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:22,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:22,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:22,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:22,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874927867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:22,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:22,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:22,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745924241] [2023-11-29 06:15:22,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:22,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:22,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:22,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:22,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 367 transitions, 8187 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:22,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:22,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:23,548 INFO L124 PetriNetUnfolderBase]: 645/1463 cut-off events. [2023-11-29 06:15:23,549 INFO L125 PetriNetUnfolderBase]: For 34494/34509 co-relation queries the response was YES. [2023-11-29 06:15:23,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 1463 events. 645/1463 cut-off events. For 34494/34509 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9859 event pairs, 22 based on Foata normal form. 11/1474 useless extension candidates. Maximal degree in co-relation 12657. Up to 373 conditions per place. [2023-11-29 06:15:23,565 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 212 selfloop transitions, 173 changer transitions 7/400 dead transitions. [2023-11-29 06:15:23,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 400 transitions, 9121 flow [2023-11-29 06:15:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:15:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:15:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 451 transitions. [2023-11-29 06:15:23,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7192982456140351 [2023-11-29 06:15:23,567 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 451 transitions. [2023-11-29 06:15:23,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 451 transitions. [2023-11-29 06:15:23,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:23,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 451 transitions. [2023-11-29 06:15:23,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 23.736842105263158) internal successors, (451), 19 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:23,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:23,570 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:23,571 INFO L175 Difference]: Start difference. First operand has 232 places, 367 transitions, 8187 flow. Second operand 19 states and 451 transitions. [2023-11-29 06:15:23,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 400 transitions, 9121 flow [2023-11-29 06:15:23,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 400 transitions, 8092 flow, removed 466 selfloop flow, removed 6 redundant places. [2023-11-29 06:15:23,894 INFO L231 Difference]: Finished difference. Result has 245 places, 355 transitions, 7329 flow [2023-11-29 06:15:23,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7329, PETRI_PLACES=245, PETRI_TRANSITIONS=355} [2023-11-29 06:15:23,895 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 210 predicate places. [2023-11-29 06:15:23,895 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 355 transitions, 7329 flow [2023-11-29 06:15:23,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:23,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:23,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:23,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:15:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:24,096 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:24,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash -573005493, now seen corresponding path program 18 times [2023-11-29 06:15:24,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:24,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608421475] [2023-11-29 06:15:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:24,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608421475] [2023-11-29 06:15:24,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608421475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750043586] [2023-11-29 06:15:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:15:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:24,162 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:24,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:15:24,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:15:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:24,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:24,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:24,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:24,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750043586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:24,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:24,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:24,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943550855] [2023-11-29 06:15:24,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:24,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:24,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:24,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:24,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:24,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 355 transitions, 7329 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:24,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:24,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:24,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:24,990 INFO L124 PetriNetUnfolderBase]: 693/1535 cut-off events. [2023-11-29 06:15:24,990 INFO L125 PetriNetUnfolderBase]: For 28171/28189 co-relation queries the response was YES. [2023-11-29 06:15:24,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12850 conditions, 1535 events. 693/1535 cut-off events. For 28171/28189 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10223 event pairs, 19 based on Foata normal form. 27/1562 useless extension candidates. Maximal degree in co-relation 12760. Up to 446 conditions per place. [2023-11-29 06:15:25,004 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 230 selfloop transitions, 178 changer transitions 6/422 dead transitions. [2023-11-29 06:15:25,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 422 transitions, 9283 flow [2023-11-29 06:15:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:15:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:15:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 342 transitions. [2023-11-29 06:15:25,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7402597402597403 [2023-11-29 06:15:25,006 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 342 transitions. [2023-11-29 06:15:25,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 342 transitions. [2023-11-29 06:15:25,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:25,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 342 transitions. [2023-11-29 06:15:25,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.428571428571427) internal successors, (342), 14 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:25,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 33.0) internal successors, (495), 15 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:25,008 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 33.0) internal successors, (495), 15 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:25,008 INFO L175 Difference]: Start difference. First operand has 245 places, 355 transitions, 7329 flow. Second operand 14 states and 342 transitions. [2023-11-29 06:15:25,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 422 transitions, 9283 flow [2023-11-29 06:15:25,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 422 transitions, 9060 flow, removed 27 selfloop flow, removed 13 redundant places. [2023-11-29 06:15:25,193 INFO L231 Difference]: Finished difference. Result has 252 places, 380 transitions, 8280 flow [2023-11-29 06:15:25,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6979, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8280, PETRI_PLACES=252, PETRI_TRANSITIONS=380} [2023-11-29 06:15:25,194 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 217 predicate places. [2023-11-29 06:15:25,194 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 380 transitions, 8280 flow [2023-11-29 06:15:25,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:25,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:25,194 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:25,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:25,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:15:25,395 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:25,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1555796116, now seen corresponding path program 19 times [2023-11-29 06:15:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:25,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778318064] [2023-11-29 06:15:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:25,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:25,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778318064] [2023-11-29 06:15:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778318064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775728956] [2023-11-29 06:15:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:15:25,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:25,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:25,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:25,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:15:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:25,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:25,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:25,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:25,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775728956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:25,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-29 06:15:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968001019] [2023-11-29 06:15:25,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:25,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:15:25,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:15:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:15:25,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:25,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 380 transitions, 8280 flow. Second operand has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:25,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:25,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:25,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:26,119 INFO L124 PetriNetUnfolderBase]: 666/1465 cut-off events. [2023-11-29 06:15:26,120 INFO L125 PetriNetUnfolderBase]: For 29779/29794 co-relation queries the response was YES. [2023-11-29 06:15:26,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12879 conditions, 1465 events. 666/1465 cut-off events. For 29779/29794 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9576 event pairs, 20 based on Foata normal form. 7/1472 useless extension candidates. Maximal degree in co-relation 12783. Up to 423 conditions per place. [2023-11-29 06:15:26,135 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 225 selfloop transitions, 164 changer transitions 6/403 dead transitions. [2023-11-29 06:15:26,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 403 transitions, 9152 flow [2023-11-29 06:15:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:15:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:15:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 381 transitions. [2023-11-29 06:15:26,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7215909090909091 [2023-11-29 06:15:26,137 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 381 transitions. [2023-11-29 06:15:26,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 381 transitions. [2023-11-29 06:15:26,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:26,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 381 transitions. [2023-11-29 06:15:26,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 23.8125) internal successors, (381), 16 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,139 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,139 INFO L175 Difference]: Start difference. First operand has 252 places, 380 transitions, 8280 flow. Second operand 16 states and 381 transitions. [2023-11-29 06:15:26,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 403 transitions, 9152 flow [2023-11-29 06:15:26,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 403 transitions, 8984 flow, removed 61 selfloop flow, removed 5 redundant places. [2023-11-29 06:15:26,390 INFO L231 Difference]: Finished difference. Result has 262 places, 368 transitions, 8208 flow [2023-11-29 06:15:26,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8025, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8208, PETRI_PLACES=262, PETRI_TRANSITIONS=368} [2023-11-29 06:15:26,391 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 227 predicate places. [2023-11-29 06:15:26,391 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 368 transitions, 8208 flow [2023-11-29 06:15:26,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:26,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:26,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:15:26,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:15:26,592 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:26,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1688351943, now seen corresponding path program 20 times [2023-11-29 06:15:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:26,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960559931] [2023-11-29 06:15:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:26,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:26,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:26,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960559931] [2023-11-29 06:15:26,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960559931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:26,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577908115] [2023-11-29 06:15:26,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:26,660 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:26,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:15:26,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:26,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:26,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:26,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:26,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577908115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:26,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:26,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-29 06:15:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010306912] [2023-11-29 06:15:26,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:26,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:15:26,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:15:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:15:26,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:26,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 368 transitions, 8208 flow. Second operand has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:26,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:26,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:27,561 INFO L124 PetriNetUnfolderBase]: 680/1485 cut-off events. [2023-11-29 06:15:27,561 INFO L125 PetriNetUnfolderBase]: For 31978/31996 co-relation queries the response was YES. [2023-11-29 06:15:27,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13098 conditions, 1485 events. 680/1485 cut-off events. For 31978/31996 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9718 event pairs, 15 based on Foata normal form. 31/1516 useless extension candidates. Maximal degree in co-relation 13005. Up to 493 conditions per place. [2023-11-29 06:15:27,582 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 196 selfloop transitions, 227 changer transitions 0/431 dead transitions. [2023-11-29 06:15:27,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 431 transitions, 9820 flow [2023-11-29 06:15:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:15:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:15:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 386 transitions. [2023-11-29 06:15:27,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7310606060606061 [2023-11-29 06:15:27,584 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 386 transitions. [2023-11-29 06:15:27,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 386 transitions. [2023-11-29 06:15:27,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:27,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 386 transitions. [2023-11-29 06:15:27,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 24.125) internal successors, (386), 16 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:27,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:27,588 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:27,588 INFO L175 Difference]: Start difference. First operand has 262 places, 368 transitions, 8208 flow. Second operand 16 states and 386 transitions. [2023-11-29 06:15:27,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 431 transitions, 9820 flow [2023-11-29 06:15:27,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 431 transitions, 9444 flow, removed 34 selfloop flow, removed 14 redundant places. [2023-11-29 06:15:27,813 INFO L231 Difference]: Finished difference. Result has 266 places, 391 transitions, 8844 flow [2023-11-29 06:15:27,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8844, PETRI_PLACES=266, PETRI_TRANSITIONS=391} [2023-11-29 06:15:27,815 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 231 predicate places. [2023-11-29 06:15:27,815 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 391 transitions, 8844 flow [2023-11-29 06:15:27,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:27,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:27,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:27,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:15:28,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:15:28,016 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:28,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1910024057, now seen corresponding path program 21 times [2023-11-29 06:15:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:28,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870876053] [2023-11-29 06:15:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:28,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870876053] [2023-11-29 06:15:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870876053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:28,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461147609] [2023-11-29 06:15:28,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:15:28,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:28,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:28,097 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:28,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:15:28,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:15:28,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:28,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:28,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:28,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461147609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:28,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:28,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-29 06:15:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445828244] [2023-11-29 06:15:28,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:15:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:15:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:15:28,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:28,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 391 transitions, 8844 flow. Second operand has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:28,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:28,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:28,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:28,999 INFO L124 PetriNetUnfolderBase]: 706/1494 cut-off events. [2023-11-29 06:15:28,999 INFO L125 PetriNetUnfolderBase]: For 31165/31188 co-relation queries the response was YES. [2023-11-29 06:15:29,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13815 conditions, 1494 events. 706/1494 cut-off events. For 31165/31188 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9501 event pairs, 15 based on Foata normal form. 24/1518 useless extension candidates. Maximal degree in co-relation 13719. Up to 448 conditions per place. [2023-11-29 06:15:29,017 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 240 selfloop transitions, 183 changer transitions 7/438 dead transitions. [2023-11-29 06:15:29,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 438 transitions, 10481 flow [2023-11-29 06:15:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:15:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:15:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 381 transitions. [2023-11-29 06:15:29,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7215909090909091 [2023-11-29 06:15:29,019 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 381 transitions. [2023-11-29 06:15:29,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 381 transitions. [2023-11-29 06:15:29,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:29,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 381 transitions. [2023-11-29 06:15:29,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 23.8125) internal successors, (381), 16 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:29,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:29,022 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:29,022 INFO L175 Difference]: Start difference. First operand has 266 places, 391 transitions, 8844 flow. Second operand 16 states and 381 transitions. [2023-11-29 06:15:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 438 transitions, 10481 flow [2023-11-29 06:15:29,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 438 transitions, 10074 flow, removed 91 selfloop flow, removed 9 redundant places. [2023-11-29 06:15:29,345 INFO L231 Difference]: Finished difference. Result has 272 places, 397 transitions, 9021 flow [2023-11-29 06:15:29,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8366, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9021, PETRI_PLACES=272, PETRI_TRANSITIONS=397} [2023-11-29 06:15:29,346 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 237 predicate places. [2023-11-29 06:15:29,346 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 397 transitions, 9021 flow [2023-11-29 06:15:29,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:29,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:29,346 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:29,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:29,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:29,546 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:29,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 656995694, now seen corresponding path program 22 times [2023-11-29 06:15:29,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:29,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956842950] [2023-11-29 06:15:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:29,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:29,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956842950] [2023-11-29 06:15:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956842950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981466542] [2023-11-29 06:15:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:15:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:29,618 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:29,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:15:29,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:15:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:29,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:29,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:29,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981466542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:29,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:29,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-29 06:15:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484770943] [2023-11-29 06:15:29,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:29,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:15:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:15:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:15:29,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:29,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 397 transitions, 9021 flow. Second operand has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:29,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:29,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:29,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:30,481 INFO L124 PetriNetUnfolderBase]: 791/1659 cut-off events. [2023-11-29 06:15:30,481 INFO L125 PetriNetUnfolderBase]: For 30650/30656 co-relation queries the response was YES. [2023-11-29 06:15:30,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14938 conditions, 1659 events. 791/1659 cut-off events. For 30650/30656 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10642 event pairs, 0 based on Foata normal form. 24/1683 useless extension candidates. Maximal degree in co-relation 14845. Up to 583 conditions per place. [2023-11-29 06:15:30,498 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 246 selfloop transitions, 235 changer transitions 0/489 dead transitions. [2023-11-29 06:15:30,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 489 transitions, 11169 flow [2023-11-29 06:15:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:15:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:15:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 388 transitions. [2023-11-29 06:15:30,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7348484848484849 [2023-11-29 06:15:30,499 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 388 transitions. [2023-11-29 06:15:30,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 388 transitions. [2023-11-29 06:15:30,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:30,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 388 transitions. [2023-11-29 06:15:30,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 24.25) internal successors, (388), 16 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:30,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:30,502 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:30,502 INFO L175 Difference]: Start difference. First operand has 272 places, 397 transitions, 9021 flow. Second operand 16 states and 388 transitions. [2023-11-29 06:15:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 489 transitions, 11169 flow [2023-11-29 06:15:30,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 489 transitions, 10659 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-11-29 06:15:30,750 INFO L231 Difference]: Finished difference. Result has 277 places, 447 transitions, 10106 flow [2023-11-29 06:15:30,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8534, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10106, PETRI_PLACES=277, PETRI_TRANSITIONS=447} [2023-11-29 06:15:30,751 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 242 predicate places. [2023-11-29 06:15:30,751 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 447 transitions, 10106 flow [2023-11-29 06:15:30,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.2) internal successors, (318), 15 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:30,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:30,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:30,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:15:30,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 06:15:30,952 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:30,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 866407190, now seen corresponding path program 23 times [2023-11-29 06:15:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:30,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503491934] [2023-11-29 06:15:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:30,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:31,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503491934] [2023-11-29 06:15:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503491934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:31,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973235877] [2023-11-29 06:15:31,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:15:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:31,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:31,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:15:31,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:15:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:31,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:31,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:31,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:31,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973235877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:31,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:31,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 06:15:31,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29470803] [2023-11-29 06:15:31,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:31,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:15:31,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:31,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:15:31,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:15:31,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:31,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 447 transitions, 10106 flow. Second operand has 14 states, 14 states have (on average 21.214285714285715) internal successors, (297), 14 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:31,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:31,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:31,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:31,824 INFO L124 PetriNetUnfolderBase]: 829/1797 cut-off events. [2023-11-29 06:15:31,824 INFO L125 PetriNetUnfolderBase]: For 34649/34667 co-relation queries the response was YES. [2023-11-29 06:15:31,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16222 conditions, 1797 events. 829/1797 cut-off events. For 34649/34667 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12076 event pairs, 35 based on Foata normal form. 14/1810 useless extension candidates. Maximal degree in co-relation 16129. Up to 437 conditions per place. [2023-11-29 06:15:31,840 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 256 selfloop transitions, 225 changer transitions 21/510 dead transitions. [2023-11-29 06:15:31,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 510 transitions, 12428 flow [2023-11-29 06:15:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:15:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:15:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 291 transitions. [2023-11-29 06:15:31,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7348484848484849 [2023-11-29 06:15:31,842 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 291 transitions. [2023-11-29 06:15:31,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 291 transitions. [2023-11-29 06:15:31,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:31,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 291 transitions. [2023-11-29 06:15:31,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:31,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:31,844 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:31,844 INFO L175 Difference]: Start difference. First operand has 277 places, 447 transitions, 10106 flow. Second operand 12 states and 291 transitions. [2023-11-29 06:15:31,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 510 transitions, 12428 flow [2023-11-29 06:15:32,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 510 transitions, 12190 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-11-29 06:15:32,054 INFO L231 Difference]: Finished difference. Result has 288 places, 460 transitions, 11415 flow [2023-11-29 06:15:32,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=9852, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11415, PETRI_PLACES=288, PETRI_TRANSITIONS=460} [2023-11-29 06:15:32,055 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 253 predicate places. [2023-11-29 06:15:32,055 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 460 transitions, 11415 flow [2023-11-29 06:15:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.214285714285715) internal successors, (297), 14 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:32,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:32,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:32,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:15:32,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 06:15:32,256 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:32,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1712123446, now seen corresponding path program 24 times [2023-11-29 06:15:32,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:32,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148995556] [2023-11-29 06:15:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:32,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:32,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:32,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148995556] [2023-11-29 06:15:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148995556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:32,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986541318] [2023-11-29 06:15:32,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:15:32,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:32,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:32,308 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:32,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:15:32,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:15:32,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:32,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:32,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:32,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:32,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986541318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:32,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:32,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481746669] [2023-11-29 06:15:32,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:32,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:32,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:32,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:32,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 460 transitions, 11415 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:32,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:32,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:33,226 INFO L124 PetriNetUnfolderBase]: 822/1781 cut-off events. [2023-11-29 06:15:33,226 INFO L125 PetriNetUnfolderBase]: For 36585/36595 co-relation queries the response was YES. [2023-11-29 06:15:33,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16755 conditions, 1781 events. 822/1781 cut-off events. For 36585/36595 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11991 event pairs, 5 based on Foata normal form. 12/1793 useless extension candidates. Maximal degree in co-relation 16655. Up to 457 conditions per place. [2023-11-29 06:15:33,254 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 241 selfloop transitions, 283 changer transitions 1/533 dead transitions. [2023-11-29 06:15:33,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 533 transitions, 13229 flow [2023-11-29 06:15:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:15:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:15:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 461 transitions. [2023-11-29 06:15:33,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7352472089314195 [2023-11-29 06:15:33,256 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 461 transitions. [2023-11-29 06:15:33,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 461 transitions. [2023-11-29 06:15:33,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:33,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 461 transitions. [2023-11-29 06:15:33,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 24.263157894736842) internal successors, (461), 19 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:33,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:33,259 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:33,259 INFO L175 Difference]: Start difference. First operand has 288 places, 460 transitions, 11415 flow. Second operand 19 states and 461 transitions. [2023-11-29 06:15:33,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 533 transitions, 13229 flow [2023-11-29 06:15:33,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 533 transitions, 12811 flow, removed 206 selfloop flow, removed 2 redundant places. [2023-11-29 06:15:33,553 INFO L231 Difference]: Finished difference. Result has 306 places, 471 transitions, 11927 flow [2023-11-29 06:15:33,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11035, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11927, PETRI_PLACES=306, PETRI_TRANSITIONS=471} [2023-11-29 06:15:33,554 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 271 predicate places. [2023-11-29 06:15:33,554 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 471 transitions, 11927 flow [2023-11-29 06:15:33,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:33,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:33,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:33,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:15:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:33,755 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:33,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1613924773, now seen corresponding path program 25 times [2023-11-29 06:15:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803227219] [2023-11-29 06:15:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:33,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:33,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803227219] [2023-11-29 06:15:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803227219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114294759] [2023-11-29 06:15:33,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:15:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:33,834 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:33,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:15:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:33,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:33,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:34,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:34,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114294759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:34,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:34,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-29 06:15:34,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664451539] [2023-11-29 06:15:34,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:15:34,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:15:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:15:34,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:34,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 471 transitions, 11927 flow. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:34,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:34,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:34,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:34,839 INFO L124 PetriNetUnfolderBase]: 895/1852 cut-off events. [2023-11-29 06:15:34,839 INFO L125 PetriNetUnfolderBase]: For 34120/34141 co-relation queries the response was YES. [2023-11-29 06:15:34,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18332 conditions, 1852 events. 895/1852 cut-off events. For 34120/34141 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12219 event pairs, 29 based on Foata normal form. 20/1872 useless extension candidates. Maximal degree in co-relation 18229. Up to 881 conditions per place. [2023-11-29 06:15:34,860 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 357 selfloop transitions, 180 changer transitions 5/550 dead transitions. [2023-11-29 06:15:34,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 550 transitions, 14562 flow [2023-11-29 06:15:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:15:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:15:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 416 transitions. [2023-11-29 06:15:34,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7003367003367004 [2023-11-29 06:15:34,861 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 416 transitions. [2023-11-29 06:15:34,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 416 transitions. [2023-11-29 06:15:34,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:34,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 416 transitions. [2023-11-29 06:15:34,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.11111111111111) internal successors, (416), 18 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:34,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:34,863 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:34,863 INFO L175 Difference]: Start difference. First operand has 306 places, 471 transitions, 11927 flow. Second operand 18 states and 416 transitions. [2023-11-29 06:15:34,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 550 transitions, 14562 flow [2023-11-29 06:15:35,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 550 transitions, 14336 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-29 06:15:35,163 INFO L231 Difference]: Finished difference. Result has 314 places, 513 transitions, 13173 flow [2023-11-29 06:15:35,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11631, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13173, PETRI_PLACES=314, PETRI_TRANSITIONS=513} [2023-11-29 06:15:35,163 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 279 predicate places. [2023-11-29 06:15:35,163 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 513 transitions, 13173 flow [2023-11-29 06:15:35,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:35,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:35,167 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:35,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 06:15:35,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 06:15:35,368 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:35,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 214287327, now seen corresponding path program 26 times [2023-11-29 06:15:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348118247] [2023-11-29 06:15:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:35,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:35,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348118247] [2023-11-29 06:15:35,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348118247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:35,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376247890] [2023-11-29 06:15:35,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:35,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:35,516 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:35,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:15:35,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:35,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:15:35,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:35,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376247890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:35,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2023-11-29 06:15:35,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300175750] [2023-11-29 06:15:35,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:15:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:15:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:15:35,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:35,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 513 transitions, 13173 flow. Second operand has 20 states, 20 states have (on average 21.3) internal successors, (426), 20 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:35,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:35,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:35,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:36,671 INFO L124 PetriNetUnfolderBase]: 1156/2408 cut-off events. [2023-11-29 06:15:36,672 INFO L125 PetriNetUnfolderBase]: For 49850/49858 co-relation queries the response was YES. [2023-11-29 06:15:36,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23593 conditions, 2408 events. 1156/2408 cut-off events. For 49850/49858 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16858 event pairs, 35 based on Foata normal form. 53/2461 useless extension candidates. Maximal degree in co-relation 23490. Up to 1357 conditions per place. [2023-11-29 06:15:36,696 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 480 selfloop transitions, 186 changer transitions 11/685 dead transitions. [2023-11-29 06:15:36,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 685 transitions, 18236 flow [2023-11-29 06:15:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:15:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:15:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 334 transitions. [2023-11-29 06:15:36,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7785547785547785 [2023-11-29 06:15:36,697 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 334 transitions. [2023-11-29 06:15:36,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 334 transitions. [2023-11-29 06:15:36,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:36,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 334 transitions. [2023-11-29 06:15:36,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 25.692307692307693) internal successors, (334), 13 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:36,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:36,698 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:36,698 INFO L175 Difference]: Start difference. First operand has 314 places, 513 transitions, 13173 flow. Second operand 13 states and 334 transitions. [2023-11-29 06:15:36,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 685 transitions, 18236 flow [2023-11-29 06:15:37,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 685 transitions, 17899 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-11-29 06:15:37,069 INFO L231 Difference]: Finished difference. Result has 328 places, 612 transitions, 16002 flow [2023-11-29 06:15:37,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=12853, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16002, PETRI_PLACES=328, PETRI_TRANSITIONS=612} [2023-11-29 06:15:37,070 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 293 predicate places. [2023-11-29 06:15:37,070 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 612 transitions, 16002 flow [2023-11-29 06:15:37,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.3) internal successors, (426), 20 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:37,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:37,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:37,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:37,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 06:15:37,271 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:37,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash -656485555, now seen corresponding path program 27 times [2023-11-29 06:15:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174009101] [2023-11-29 06:15:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:37,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174009101] [2023-11-29 06:15:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174009101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792320606] [2023-11-29 06:15:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:15:37,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:37,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:37,371 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:37,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:15:37,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:15:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:37,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:37,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:15:37,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:15:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792320606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:37,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:15:37,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-29 06:15:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135272012] [2023-11-29 06:15:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:15:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:15:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:37,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:37,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 612 transitions, 16002 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:37,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:37,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:37,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:38,576 INFO L124 PetriNetUnfolderBase]: 1276/2817 cut-off events. [2023-11-29 06:15:38,576 INFO L125 PetriNetUnfolderBase]: For 62491/62520 co-relation queries the response was YES. [2023-11-29 06:15:38,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27617 conditions, 2817 events. 1276/2817 cut-off events. For 62491/62520 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21668 event pairs, 80 based on Foata normal form. 43/2860 useless extension candidates. Maximal degree in co-relation 27507. Up to 1550 conditions per place. [2023-11-29 06:15:38,603 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 513 selfloop transitions, 53 changer transitions 130/704 dead transitions. [2023-11-29 06:15:38,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 704 transitions, 19427 flow [2023-11-29 06:15:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:15:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:15:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2023-11-29 06:15:38,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7525252525252525 [2023-11-29 06:15:38,605 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2023-11-29 06:15:38,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2023-11-29 06:15:38,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:38,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2023-11-29 06:15:38,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:38,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:38,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:38,606 INFO L175 Difference]: Start difference. First operand has 328 places, 612 transitions, 16002 flow. Second operand 6 states and 149 transitions. [2023-11-29 06:15:38,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 704 transitions, 19427 flow [2023-11-29 06:15:39,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 704 transitions, 18898 flow, removed 219 selfloop flow, removed 4 redundant places. [2023-11-29 06:15:39,156 INFO L231 Difference]: Finished difference. Result has 333 places, 525 transitions, 14052 flow [2023-11-29 06:15:39,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15582, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14052, PETRI_PLACES=333, PETRI_TRANSITIONS=525} [2023-11-29 06:15:39,158 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 298 predicate places. [2023-11-29 06:15:39,158 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 525 transitions, 14052 flow [2023-11-29 06:15:39,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:39,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:39,158 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:39,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:15:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 06:15:39,358 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:39,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1579789747, now seen corresponding path program 28 times [2023-11-29 06:15:39,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:39,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111139390] [2023-11-29 06:15:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:39,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111139390] [2023-11-29 06:15:39,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111139390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:39,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331634016] [2023-11-29 06:15:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:15:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:39,449 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:39,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:15:39,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:15:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:39,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:15:39,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:39,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:15:39,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331634016] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:39,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:39,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 13 [2023-11-29 06:15:39,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110416602] [2023-11-29 06:15:39,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:39,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:15:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:15:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:15:39,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:39,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 525 transitions, 14052 flow. Second operand has 14 states, 14 states have (on average 21.428571428571427) internal successors, (300), 14 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:39,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:39,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:39,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:40,993 INFO L124 PetriNetUnfolderBase]: 1332/2888 cut-off events. [2023-11-29 06:15:40,994 INFO L125 PetriNetUnfolderBase]: For 66992/67027 co-relation queries the response was YES. [2023-11-29 06:15:41,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28886 conditions, 2888 events. 1332/2888 cut-off events. For 66992/67027 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22090 event pairs, 111 based on Foata normal form. 20/2908 useless extension candidates. Maximal degree in co-relation 28773. Up to 1872 conditions per place. [2023-11-29 06:15:41,036 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 493 selfloop transitions, 194 changer transitions 11/706 dead transitions. [2023-11-29 06:15:41,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 706 transitions, 19679 flow [2023-11-29 06:15:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:15:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:15:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 352 transitions. [2023-11-29 06:15:41,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7619047619047619 [2023-11-29 06:15:41,038 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 352 transitions. [2023-11-29 06:15:41,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 352 transitions. [2023-11-29 06:15:41,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:41,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 352 transitions. [2023-11-29 06:15:41,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.142857142857142) internal successors, (352), 14 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:41,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 33.0) internal successors, (495), 15 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:41,041 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 33.0) internal successors, (495), 15 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:41,041 INFO L175 Difference]: Start difference. First operand has 333 places, 525 transitions, 14052 flow. Second operand 14 states and 352 transitions. [2023-11-29 06:15:41,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 706 transitions, 19679 flow [2023-11-29 06:15:41,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 706 transitions, 18419 flow, removed 130 selfloop flow, removed 23 redundant places. [2023-11-29 06:15:41,669 INFO L231 Difference]: Finished difference. Result has 322 places, 637 transitions, 16888 flow [2023-11-29 06:15:41,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=13105, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16888, PETRI_PLACES=322, PETRI_TRANSITIONS=637} [2023-11-29 06:15:41,670 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 287 predicate places. [2023-11-29 06:15:41,670 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 637 transitions, 16888 flow [2023-11-29 06:15:41,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.428571428571427) internal successors, (300), 14 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:41,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:41,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:41,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:15:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 06:15:41,871 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:41,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash -829231531, now seen corresponding path program 29 times [2023-11-29 06:15:41,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:41,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88037819] [2023-11-29 06:15:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:41,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88037819] [2023-11-29 06:15:41,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88037819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:41,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915145663] [2023-11-29 06:15:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:15:41,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:41,991 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:41,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:15:42,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:15:42,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:42,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:15:42,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:42,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:15:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915145663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:42,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:42,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 18 [2023-11-29 06:15:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010900320] [2023-11-29 06:15:42,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:42,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:15:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:15:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:15:42,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:42,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 637 transitions, 16888 flow. Second operand has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:42,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:42,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:42,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:43,800 INFO L124 PetriNetUnfolderBase]: 1513/3277 cut-off events. [2023-11-29 06:15:43,801 INFO L125 PetriNetUnfolderBase]: For 69204/69243 co-relation queries the response was YES. [2023-11-29 06:15:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32038 conditions, 3277 events. 1513/3277 cut-off events. For 69204/69243 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25719 event pairs, 139 based on Foata normal form. 43/3320 useless extension candidates. Maximal degree in co-relation 31931. Up to 2133 conditions per place. [2023-11-29 06:15:43,834 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 529 selfloop transitions, 247 changer transitions 7/791 dead transitions. [2023-11-29 06:15:43,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 791 transitions, 21772 flow [2023-11-29 06:15:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:15:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:15:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 434 transitions. [2023-11-29 06:15:43,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7736185383244206 [2023-11-29 06:15:43,836 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 434 transitions. [2023-11-29 06:15:43,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 434 transitions. [2023-11-29 06:15:43,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:43,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 434 transitions. [2023-11-29 06:15:43,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:43,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:43,837 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:43,837 INFO L175 Difference]: Start difference. First operand has 322 places, 637 transitions, 16888 flow. Second operand 17 states and 434 transitions. [2023-11-29 06:15:43,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 791 transitions, 21772 flow [2023-11-29 06:15:44,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 791 transitions, 20442 flow, removed 574 selfloop flow, removed 6 redundant places. [2023-11-29 06:15:44,470 INFO L231 Difference]: Finished difference. Result has 343 places, 726 transitions, 19132 flow [2023-11-29 06:15:44,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15433, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19132, PETRI_PLACES=343, PETRI_TRANSITIONS=726} [2023-11-29 06:15:44,470 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 308 predicate places. [2023-11-29 06:15:44,471 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 726 transitions, 19132 flow [2023-11-29 06:15:44,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:44,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:44,471 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:44,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:15:44,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 06:15:44,671 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:44,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 337298865, now seen corresponding path program 30 times [2023-11-29 06:15:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:44,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355392769] [2023-11-29 06:15:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:44,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:44,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355392769] [2023-11-29 06:15:44,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355392769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369512087] [2023-11-29 06:15:44,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:15:44,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:44,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:44,843 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:44,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:15:44,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:15:44,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:44,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:15:44,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:45,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:45,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369512087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:45,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:45,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2023-11-29 06:15:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442161122] [2023-11-29 06:15:45,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:45,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:15:45,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:15:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:15:45,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:45,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 726 transitions, 19132 flow. Second operand has 20 states, 20 states have (on average 21.25) internal successors, (425), 20 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:45,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:45,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:45,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:46,761 INFO L124 PetriNetUnfolderBase]: 1628/3491 cut-off events. [2023-11-29 06:15:46,761 INFO L125 PetriNetUnfolderBase]: For 81699/81744 co-relation queries the response was YES. [2023-11-29 06:15:46,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35002 conditions, 3491 events. 1628/3491 cut-off events. For 81699/81744 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27457 event pairs, 165 based on Foata normal form. 6/3497 useless extension candidates. Maximal degree in co-relation 34885. Up to 2762 conditions per place. [2023-11-29 06:15:46,804 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 676 selfloop transitions, 140 changer transitions 2/826 dead transitions. [2023-11-29 06:15:46,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 826 transitions, 23214 flow [2023-11-29 06:15:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:15:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:15:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2023-11-29 06:15:46,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7412587412587412 [2023-11-29 06:15:46,805 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 318 transitions. [2023-11-29 06:15:46,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 318 transitions. [2023-11-29 06:15:46,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:46,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 318 transitions. [2023-11-29 06:15:46,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 24.46153846153846) internal successors, (318), 13 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:46,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:46,807 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:46,807 INFO L175 Difference]: Start difference. First operand has 343 places, 726 transitions, 19132 flow. Second operand 13 states and 318 transitions. [2023-11-29 06:15:46,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 826 transitions, 23214 flow [2023-11-29 06:15:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 826 transitions, 21919 flow, removed 642 selfloop flow, removed 2 redundant places. [2023-11-29 06:15:47,650 INFO L231 Difference]: Finished difference. Result has 357 places, 789 transitions, 20301 flow [2023-11-29 06:15:47,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=18179, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20301, PETRI_PLACES=357, PETRI_TRANSITIONS=789} [2023-11-29 06:15:47,651 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 322 predicate places. [2023-11-29 06:15:47,651 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 789 transitions, 20301 flow [2023-11-29 06:15:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.25) internal successors, (425), 20 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:47,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:47,651 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:47,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:15:47,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 06:15:47,852 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:47,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 404976712, now seen corresponding path program 31 times [2023-11-29 06:15:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:47,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897699143] [2023-11-29 06:15:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:47,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897699143] [2023-11-29 06:15:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897699143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505774871] [2023-11-29 06:15:47,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:15:47,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:47,926 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:47,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:15:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:48,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:15:48,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:48,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:48,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505774871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:48,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:48,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-29 06:15:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765617152] [2023-11-29 06:15:48,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:48,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:15:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:15:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:15:48,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:48,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 789 transitions, 20301 flow. Second operand has 18 states, 18 states have (on average 20.944444444444443) internal successors, (377), 18 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:48,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:48,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:48,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:49,710 INFO L124 PetriNetUnfolderBase]: 1627/3597 cut-off events. [2023-11-29 06:15:49,711 INFO L125 PetriNetUnfolderBase]: For 91213/91267 co-relation queries the response was YES. [2023-11-29 06:15:49,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35570 conditions, 3597 events. 1627/3597 cut-off events. For 91213/91267 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 29115 event pairs, 45 based on Foata normal form. 114/3711 useless extension candidates. Maximal degree in co-relation 35447. Up to 760 conditions per place. [2023-11-29 06:15:49,754 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 316 selfloop transitions, 506 changer transitions 51/881 dead transitions. [2023-11-29 06:15:49,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 881 transitions, 24102 flow [2023-11-29 06:15:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:15:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:15:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 363 transitions. [2023-11-29 06:15:49,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2023-11-29 06:15:49,755 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 363 transitions. [2023-11-29 06:15:49,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 363 transitions. [2023-11-29 06:15:49,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:49,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 363 transitions. [2023-11-29 06:15:49,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 24.2) internal successors, (363), 15 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:49,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:49,756 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:49,756 INFO L175 Difference]: Start difference. First operand has 357 places, 789 transitions, 20301 flow. Second operand 15 states and 363 transitions. [2023-11-29 06:15:49,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 881 transitions, 24102 flow [2023-11-29 06:15:50,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 881 transitions, 23760 flow, removed 145 selfloop flow, removed 2 redundant places. [2023-11-29 06:15:50,775 INFO L231 Difference]: Finished difference. Result has 377 places, 788 transitions, 22641 flow [2023-11-29 06:15:50,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=19837, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22641, PETRI_PLACES=377, PETRI_TRANSITIONS=788} [2023-11-29 06:15:50,776 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 342 predicate places. [2023-11-29 06:15:50,776 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 788 transitions, 22641 flow [2023-11-29 06:15:50,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.944444444444443) internal successors, (377), 18 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:50,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:50,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 06:15:50,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 06:15:50,977 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:50,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash 657019182, now seen corresponding path program 32 times [2023-11-29 06:15:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:50,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204041826] [2023-11-29 06:15:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:50,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:51,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:51,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204041826] [2023-11-29 06:15:51,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204041826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:51,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012741420] [2023-11-29 06:15:51,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:51,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:51,044 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:51,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:15:51,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:51,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:51,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:15:51,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:51,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012741420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:51,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-29 06:15:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838810685] [2023-11-29 06:15:51,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:15:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:15:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:15:51,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:51,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 788 transitions, 22641 flow. Second operand has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:51,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:51,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:51,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:53,320 INFO L124 PetriNetUnfolderBase]: 1526/3392 cut-off events. [2023-11-29 06:15:53,320 INFO L125 PetriNetUnfolderBase]: For 95430/95478 co-relation queries the response was YES. [2023-11-29 06:15:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36127 conditions, 3392 events. 1526/3392 cut-off events. For 95430/95478 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26960 event pairs, 47 based on Foata normal form. 44/3436 useless extension candidates. Maximal degree in co-relation 35995. Up to 796 conditions per place. [2023-11-29 06:15:53,362 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 281 selfloop transitions, 589 changer transitions 2/880 dead transitions. [2023-11-29 06:15:53,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 880 transitions, 25734 flow [2023-11-29 06:15:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:15:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 06:15:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 612 transitions. [2023-11-29 06:15:53,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7132867132867133 [2023-11-29 06:15:53,363 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 612 transitions. [2023-11-29 06:15:53,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 612 transitions. [2023-11-29 06:15:53,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:53,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 612 transitions. [2023-11-29 06:15:53,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 23.53846153846154) internal successors, (612), 26 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:53,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 33.0) internal successors, (891), 27 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:53,365 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 33.0) internal successors, (891), 27 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:53,366 INFO L175 Difference]: Start difference. First operand has 377 places, 788 transitions, 22641 flow. Second operand 26 states and 612 transitions. [2023-11-29 06:15:53,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 880 transitions, 25734 flow [2023-11-29 06:15:54,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 880 transitions, 24657 flow, removed 537 selfloop flow, removed 1 redundant places. [2023-11-29 06:15:54,387 INFO L231 Difference]: Finished difference. Result has 404 places, 814 transitions, 23916 flow [2023-11-29 06:15:54,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=21642, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=23916, PETRI_PLACES=404, PETRI_TRANSITIONS=814} [2023-11-29 06:15:54,388 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 369 predicate places. [2023-11-29 06:15:54,388 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 814 transitions, 23916 flow [2023-11-29 06:15:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:54,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:54,389 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:54,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 06:15:54,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:54,589 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:54,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash -440006855, now seen corresponding path program 33 times [2023-11-29 06:15:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:54,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054333361] [2023-11-29 06:15:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054333361] [2023-11-29 06:15:54,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054333361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:54,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393419093] [2023-11-29 06:15:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:15:54,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:54,647 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:54,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:15:54,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:15:54,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:54,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:15:54,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:15:54,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:15:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393419093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:15:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:15:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-29 06:15:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515171561] [2023-11-29 06:15:54,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:15:54,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:15:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:15:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:15:54,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:54,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 814 transitions, 23916 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:54,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:54,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:54,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:56,272 INFO L124 PetriNetUnfolderBase]: 1522/3343 cut-off events. [2023-11-29 06:15:56,273 INFO L125 PetriNetUnfolderBase]: For 66434/66483 co-relation queries the response was YES. [2023-11-29 06:15:56,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35233 conditions, 3343 events. 1522/3343 cut-off events. For 66434/66483 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26300 event pairs, 91 based on Foata normal form. 49/3392 useless extension candidates. Maximal degree in co-relation 35097. Up to 2263 conditions per place. [2023-11-29 06:15:56,316 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 706 selfloop transitions, 50 changer transitions 59/823 dead transitions. [2023-11-29 06:15:56,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 823 transitions, 25580 flow [2023-11-29 06:15:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:15:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:15:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2023-11-29 06:15:56,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7171717171717171 [2023-11-29 06:15:56,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 142 transitions. [2023-11-29 06:15:56,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 142 transitions. [2023-11-29 06:15:56,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:56,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 142 transitions. [2023-11-29 06:15:56,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:56,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:56,318 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:56,318 INFO L175 Difference]: Start difference. First operand has 404 places, 814 transitions, 23916 flow. Second operand 6 states and 142 transitions. [2023-11-29 06:15:56,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 823 transitions, 25580 flow [2023-11-29 06:15:57,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 823 transitions, 24956 flow, removed 138 selfloop flow, removed 12 redundant places. [2023-11-29 06:15:57,274 INFO L231 Difference]: Finished difference. Result has 395 places, 758 transitions, 22356 flow [2023-11-29 06:15:57,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=23278, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=22356, PETRI_PLACES=395, PETRI_TRANSITIONS=758} [2023-11-29 06:15:57,275 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 360 predicate places. [2023-11-29 06:15:57,275 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 758 transitions, 22356 flow [2023-11-29 06:15:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:57,275 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:57,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:57,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:57,476 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:15:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1217799364, now seen corresponding path program 34 times [2023-11-29 06:15:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580999546] [2023-11-29 06:15:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:57,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:57,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580999546] [2023-11-29 06:15:57,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580999546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:57,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212404613] [2023-11-29 06:15:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:15:57,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:57,531 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:57,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 06:15:57,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:15:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:57,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:15:57,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:57,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:57,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212404613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:15:57,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:15:57,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2023-11-29 06:15:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428696365] [2023-11-29 06:15:57,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:15:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:15:57,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:15:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:15:57,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:15:57,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:15:57,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 758 transitions, 22356 flow. Second operand has 20 states, 20 states have (on average 20.95) internal successors, (419), 20 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:57,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:15:57,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:15:57,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:15:59,466 INFO L124 PetriNetUnfolderBase]: 1496/3188 cut-off events. [2023-11-29 06:15:59,466 INFO L125 PetriNetUnfolderBase]: For 56925/56973 co-relation queries the response was YES. [2023-11-29 06:15:59,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33884 conditions, 3188 events. 1496/3188 cut-off events. For 56925/56973 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24111 event pairs, 49 based on Foata normal form. 48/3236 useless extension candidates. Maximal degree in co-relation 33752. Up to 982 conditions per place. [2023-11-29 06:15:59,514 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 318 selfloop transitions, 509 changer transitions 0/835 dead transitions. [2023-11-29 06:15:59,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 835 transitions, 25201 flow [2023-11-29 06:15:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:15:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:15:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 487 transitions. [2023-11-29 06:15:59,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027417027417028 [2023-11-29 06:15:59,516 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 487 transitions. [2023-11-29 06:15:59,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 487 transitions. [2023-11-29 06:15:59,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:59,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 487 transitions. [2023-11-29 06:15:59,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 23.19047619047619) internal successors, (487), 21 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:59,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:59,518 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:59,518 INFO L175 Difference]: Start difference. First operand has 395 places, 758 transitions, 22356 flow. Second operand 21 states and 487 transitions. [2023-11-29 06:15:59,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 835 transitions, 25201 flow [2023-11-29 06:16:00,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 835 transitions, 22943 flow, removed 181 selfloop flow, removed 23 redundant places. [2023-11-29 06:16:00,281 INFO L231 Difference]: Finished difference. Result has 385 places, 793 transitions, 23104 flow [2023-11-29 06:16:00,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=20113, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23104, PETRI_PLACES=385, PETRI_TRANSITIONS=793} [2023-11-29 06:16:00,283 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 350 predicate places. [2023-11-29 06:16:00,283 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 793 transitions, 23104 flow [2023-11-29 06:16:00,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.95) internal successors, (419), 20 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:00,283 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:00,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:16:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:00,484 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:00,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -749720887, now seen corresponding path program 35 times [2023-11-29 06:16:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690821523] [2023-11-29 06:16:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:00,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690821523] [2023-11-29 06:16:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690821523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135047859] [2023-11-29 06:16:00,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:16:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:00,550 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:00,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:16:00,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:16:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:00,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:16:00,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:00,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135047859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:00,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:00,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-29 06:16:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770757900] [2023-11-29 06:16:00,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:00,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:16:00,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:16:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:16:00,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:00,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 793 transitions, 23104 flow. Second operand has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:00,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:00,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:00,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:03,076 INFO L124 PetriNetUnfolderBase]: 1760/3693 cut-off events. [2023-11-29 06:16:03,076 INFO L125 PetriNetUnfolderBase]: For 67044/67085 co-relation queries the response was YES. [2023-11-29 06:16:03,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39862 conditions, 3693 events. 1760/3693 cut-off events. For 67044/67085 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28268 event pairs, 26 based on Foata normal form. 37/3730 useless extension candidates. Maximal degree in co-relation 39730. Up to 856 conditions per place. [2023-11-29 06:16:03,145 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 417 selfloop transitions, 601 changer transitions 13/1039 dead transitions. [2023-11-29 06:16:03,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1039 transitions, 30561 flow [2023-11-29 06:16:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:16:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 06:16:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 781 transitions. [2023-11-29 06:16:03,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7171717171717171 [2023-11-29 06:16:03,148 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 781 transitions. [2023-11-29 06:16:03,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 781 transitions. [2023-11-29 06:16:03,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:03,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 781 transitions. [2023-11-29 06:16:03,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 23.666666666666668) internal successors, (781), 33 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:03,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 33.0) internal successors, (1122), 34 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:03,153 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 33.0) internal successors, (1122), 34 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:03,153 INFO L175 Difference]: Start difference. First operand has 385 places, 793 transitions, 23104 flow. Second operand 33 states and 781 transitions. [2023-11-29 06:16:03,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1039 transitions, 30561 flow [2023-11-29 06:16:04,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1039 transitions, 30192 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-11-29 06:16:04,193 INFO L231 Difference]: Finished difference. Result has 418 places, 943 transitions, 28635 flow [2023-11-29 06:16:04,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=22779, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=28635, PETRI_PLACES=418, PETRI_TRANSITIONS=943} [2023-11-29 06:16:04,194 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 383 predicate places. [2023-11-29 06:16:04,194 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 943 transitions, 28635 flow [2023-11-29 06:16:04,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:04,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:04,195 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:04,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 06:16:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 06:16:04,395 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:04,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1711446900, now seen corresponding path program 36 times [2023-11-29 06:16:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:04,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142648192] [2023-11-29 06:16:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:04,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:04,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142648192] [2023-11-29 06:16:04,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142648192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:04,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351287787] [2023-11-29 06:16:04,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:16:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:04,477 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:04,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 06:16:04,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:16:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:04,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:16:04,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:16:04,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:16:04,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351287787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:16:04,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:16:04,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-29 06:16:04,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240940481] [2023-11-29 06:16:04,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:16:04,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:16:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:16:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:16:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:04,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 943 transitions, 28635 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:04,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:04,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:04,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:06,445 INFO L124 PetriNetUnfolderBase]: 1742/3504 cut-off events. [2023-11-29 06:16:06,445 INFO L125 PetriNetUnfolderBase]: For 68193/68244 co-relation queries the response was YES. [2023-11-29 06:16:06,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40156 conditions, 3504 events. 1742/3504 cut-off events. For 68193/68244 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26095 event pairs, 35 based on Foata normal form. 77/3581 useless extension candidates. Maximal degree in co-relation 40018. Up to 1681 conditions per place. [2023-11-29 06:16:06,489 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 641 selfloop transitions, 38 changer transitions 262/949 dead transitions. [2023-11-29 06:16:06,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 949 transitions, 30448 flow [2023-11-29 06:16:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:16:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:16:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2023-11-29 06:16:06,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2023-11-29 06:16:06,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 144 transitions. [2023-11-29 06:16:06,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 144 transitions. [2023-11-29 06:16:06,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:06,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 144 transitions. [2023-11-29 06:16:06,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.0) internal successors, (144), 6 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) [2023-11-29 06:16:06,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:06,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:06,491 INFO L175 Difference]: Start difference. First operand has 418 places, 943 transitions, 28635 flow. Second operand 6 states and 144 transitions. [2023-11-29 06:16:06,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 949 transitions, 30448 flow [2023-11-29 06:16:07,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 949 transitions, 28249 flow, removed 820 selfloop flow, removed 16 redundant places. [2023-11-29 06:16:07,685 INFO L231 Difference]: Finished difference. Result has 405 places, 681 transitions, 20174 flow [2023-11-29 06:16:07,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=26327, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=20174, PETRI_PLACES=405, PETRI_TRANSITIONS=681} [2023-11-29 06:16:07,686 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 370 predicate places. [2023-11-29 06:16:07,686 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 681 transitions, 20174 flow [2023-11-29 06:16:07,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:07,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:07,686 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:07,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 06:16:07,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:07,887 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:07,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1796725115, now seen corresponding path program 37 times [2023-11-29 06:16:07,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:07,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193058740] [2023-11-29 06:16:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:07,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193058740] [2023-11-29 06:16:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193058740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897472656] [2023-11-29 06:16:07,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:16:07,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:07,939 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:07,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 06:16:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:08,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:16:08,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:08,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:08,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897472656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:08,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:08,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-29 06:16:08,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717613922] [2023-11-29 06:16:08,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:08,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:16:08,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:16:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:16:08,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 681 transitions, 20174 flow. Second operand has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:09,487 INFO L124 PetriNetUnfolderBase]: 1210/2306 cut-off events. [2023-11-29 06:16:09,487 INFO L125 PetriNetUnfolderBase]: For 39858/39878 co-relation queries the response was YES. [2023-11-29 06:16:09,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27368 conditions, 2306 events. 1210/2306 cut-off events. For 39858/39878 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14022 event pairs, 28 based on Foata normal form. 12/2318 useless extension candidates. Maximal degree in co-relation 27249. Up to 584 conditions per place. [2023-11-29 06:16:09,520 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 281 selfloop transitions, 477 changer transitions 9/775 dead transitions. [2023-11-29 06:16:09,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 775 transitions, 23812 flow [2023-11-29 06:16:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:16:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 06:16:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 530 transitions. [2023-11-29 06:16:09,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6982872200263505 [2023-11-29 06:16:09,521 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 530 transitions. [2023-11-29 06:16:09,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 530 transitions. [2023-11-29 06:16:09,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:09,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 530 transitions. [2023-11-29 06:16:09,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 23.043478260869566) internal successors, (530), 23 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:09,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 33.0) internal successors, (792), 24 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:09,523 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 33.0) internal successors, (792), 24 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:09,524 INFO L175 Difference]: Start difference. First operand has 405 places, 681 transitions, 20174 flow. Second operand 23 states and 530 transitions. [2023-11-29 06:16:09,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 775 transitions, 23812 flow [2023-11-29 06:16:09,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 775 transitions, 20859 flow, removed 285 selfloop flow, removed 41 redundant places. [2023-11-29 06:16:10,007 INFO L231 Difference]: Finished difference. Result has 354 places, 725 transitions, 19937 flow [2023-11-29 06:16:10,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17452, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=19937, PETRI_PLACES=354, PETRI_TRANSITIONS=725} [2023-11-29 06:16:10,008 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 319 predicate places. [2023-11-29 06:16:10,008 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 725 transitions, 19937 flow [2023-11-29 06:16:10,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:10,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:10,009 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:10,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 06:16:10,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:10,209 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:10,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1605711909, now seen corresponding path program 38 times [2023-11-29 06:16:10,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:10,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953291359] [2023-11-29 06:16:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:10,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:10,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:10,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953291359] [2023-11-29 06:16:10,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953291359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:10,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510862166] [2023-11-29 06:16:10,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:16:10,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:10,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:10,265 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:10,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 06:16:10,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:16:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:10,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:16:10,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:10,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510862166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:10,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2023-11-29 06:16:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066460224] [2023-11-29 06:16:10,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:10,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:16:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:16:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:16:10,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:10,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 725 transitions, 19937 flow. Second operand has 20 states, 20 states have (on average 20.95) internal successors, (419), 20 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:10,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:10,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:10,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:11,649 INFO L124 PetriNetUnfolderBase]: 1257/2362 cut-off events. [2023-11-29 06:16:11,650 INFO L125 PetriNetUnfolderBase]: For 28252/28273 co-relation queries the response was YES. [2023-11-29 06:16:11,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26155 conditions, 2362 events. 1257/2362 cut-off events. For 28252/28273 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14145 event pairs, 27 based on Foata normal form. 9/2371 useless extension candidates. Maximal degree in co-relation 26062. Up to 584 conditions per place. [2023-11-29 06:16:11,685 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 249 selfloop transitions, 531 changer transitions 7/795 dead transitions. [2023-11-29 06:16:11,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 795 transitions, 22702 flow [2023-11-29 06:16:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:16:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:16:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 438 transitions. [2023-11-29 06:16:11,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985645933014354 [2023-11-29 06:16:11,686 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 438 transitions. [2023-11-29 06:16:11,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 438 transitions. [2023-11-29 06:16:11,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:11,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 438 transitions. [2023-11-29 06:16:11,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 23.05263157894737) internal successors, (438), 19 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:11,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:11,689 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:11,689 INFO L175 Difference]: Start difference. First operand has 354 places, 725 transitions, 19937 flow. Second operand 19 states and 438 transitions. [2023-11-29 06:16:11,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 795 transitions, 22702 flow [2023-11-29 06:16:12,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 795 transitions, 21626 flow, removed 406 selfloop flow, removed 14 redundant places. [2023-11-29 06:16:12,106 INFO L231 Difference]: Finished difference. Result has 358 places, 755 transitions, 20964 flow [2023-11-29 06:16:12,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=19025, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20964, PETRI_PLACES=358, PETRI_TRANSITIONS=755} [2023-11-29 06:16:12,107 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 323 predicate places. [2023-11-29 06:16:12,107 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 755 transitions, 20964 flow [2023-11-29 06:16:12,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.95) internal successors, (419), 20 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:12,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:12,107 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:12,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-29 06:16:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 06:16:12,308 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:12,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -235453651, now seen corresponding path program 39 times [2023-11-29 06:16:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256140248] [2023-11-29 06:16:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:12,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256140248] [2023-11-29 06:16:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256140248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243393229] [2023-11-29 06:16:12,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:16:12,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:12,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:12,396 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:12,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 06:16:12,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:16:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:12,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:16:12,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:16:12,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:16:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243393229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:16:12,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:16:12,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2023-11-29 06:16:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146952486] [2023-11-29 06:16:12,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:16:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:16:12,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:16:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:16:12,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:12,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 755 transitions, 20964 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:12,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:12,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:12,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:13,390 INFO L124 PetriNetUnfolderBase]: 1286/2362 cut-off events. [2023-11-29 06:16:13,390 INFO L125 PetriNetUnfolderBase]: For 25484/25512 co-relation queries the response was YES. [2023-11-29 06:16:13,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26745 conditions, 2362 events. 1286/2362 cut-off events. For 25484/25512 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14147 event pairs, 6 based on Foata normal form. 53/2415 useless extension candidates. Maximal degree in co-relation 26655. Up to 1831 conditions per place. [2023-11-29 06:16:13,409 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 39 selfloop transitions, 5 changer transitions 742/794 dead transitions. [2023-11-29 06:16:13,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 794 transitions, 23296 flow [2023-11-29 06:16:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:16:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:16:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2023-11-29 06:16:13,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7323232323232324 [2023-11-29 06:16:13,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2023-11-29 06:16:13,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2023-11-29 06:16:13,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:13,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2023-11-29 06:16:13,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:13,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:13,410 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:13,411 INFO L175 Difference]: Start difference. First operand has 358 places, 755 transitions, 20964 flow. Second operand 6 states and 145 transitions. [2023-11-29 06:16:13,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 794 transitions, 23296 flow [2023-11-29 06:16:13,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 794 transitions, 22775 flow, removed 81 selfloop flow, removed 10 redundant places. [2023-11-29 06:16:13,774 INFO L231 Difference]: Finished difference. Result has 351 places, 44 transitions, 761 flow [2023-11-29 06:16:13,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=20430, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=351, PETRI_TRANSITIONS=44} [2023-11-29 06:16:13,775 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 316 predicate places. [2023-11-29 06:16:13,775 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 44 transitions, 761 flow [2023-11-29 06:16:13,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:13,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:13,775 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:13,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-29 06:16:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 06:16:13,975 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:13,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1746356227, now seen corresponding path program 40 times [2023-11-29 06:16:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009656895] [2023-11-29 06:16:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009656895] [2023-11-29 06:16:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009656895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136763241] [2023-11-29 06:16:14,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:16:14,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:14,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:14,032 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:14,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 06:16:14,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:16:14,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:14,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:16:14,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:14,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:14,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136763241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:14,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:14,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-29 06:16:14,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818550615] [2023-11-29 06:16:14,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:14,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:16:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:16:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:16:14,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 44 transitions, 761 flow. Second operand has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:14,430 INFO L124 PetriNetUnfolderBase]: 46/132 cut-off events. [2023-11-29 06:16:14,430 INFO L125 PetriNetUnfolderBase]: For 3215/3215 co-relation queries the response was YES. [2023-11-29 06:16:14,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 132 events. 46/132 cut-off events. For 3215/3215 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 343 event pairs, 1 based on Foata normal form. 3/135 useless extension candidates. Maximal degree in co-relation 1127. Up to 28 conditions per place. [2023-11-29 06:16:14,432 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 34 selfloop transitions, 14 changer transitions 8/64 dead transitions. [2023-11-29 06:16:14,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 64 transitions, 988 flow [2023-11-29 06:16:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:16:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:16:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 295 transitions. [2023-11-29 06:16:14,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6876456876456877 [2023-11-29 06:16:14,433 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 295 transitions. [2023-11-29 06:16:14,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 295 transitions. [2023-11-29 06:16:14,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:14,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 295 transitions. [2023-11-29 06:16:14,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 22.692307692307693) internal successors, (295), 13 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:14,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:14,435 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:14,435 INFO L175 Difference]: Start difference. First operand has 351 places, 44 transitions, 761 flow. Second operand 13 states and 295 transitions. [2023-11-29 06:16:14,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 64 transitions, 988 flow [2023-11-29 06:16:14,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 64 transitions, 419 flow, removed 77 selfloop flow, removed 136 redundant places. [2023-11-29 06:16:14,445 INFO L231 Difference]: Finished difference. Result has 111 places, 40 transitions, 253 flow [2023-11-29 06:16:14,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=253, PETRI_PLACES=111, PETRI_TRANSITIONS=40} [2023-11-29 06:16:14,445 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 76 predicate places. [2023-11-29 06:16:14,445 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 40 transitions, 253 flow [2023-11-29 06:16:14,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.952380952380953) internal successors, (440), 21 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:14,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:14,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:14,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 06:16:14,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 06:16:14,646 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:14,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash -991993840, now seen corresponding path program 41 times [2023-11-29 06:16:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625846894] [2023-11-29 06:16:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625846894] [2023-11-29 06:16:14,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625846894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884813453] [2023-11-29 06:16:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:16:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:14,775 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 06:16:14,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:16:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:14,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:16:14,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:15,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:15,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884813453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:15,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:15,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 24 [2023-11-29 06:16:15,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285958696] [2023-11-29 06:16:15,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:15,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:16:15,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:16:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:16:15,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:15,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 40 transitions, 253 flow. Second operand has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:15,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:15,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:15,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:15,309 INFO L124 PetriNetUnfolderBase]: 53/148 cut-off events. [2023-11-29 06:16:15,309 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2023-11-29 06:16:15,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 148 events. 53/148 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 410 event pairs, 1 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 619. Up to 56 conditions per place. [2023-11-29 06:16:15,310 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 46 selfloop transitions, 17 changer transitions 5/76 dead transitions. [2023-11-29 06:16:15,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 76 transitions, 562 flow [2023-11-29 06:16:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:16:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:16:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 363 transitions. [2023-11-29 06:16:15,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-11-29 06:16:15,312 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 363 transitions. [2023-11-29 06:16:15,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 363 transitions. [2023-11-29 06:16:15,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:15,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 363 transitions. [2023-11-29 06:16:15,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 22.6875) internal successors, (363), 16 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:15,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:15,313 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:15,313 INFO L175 Difference]: Start difference. First operand has 111 places, 40 transitions, 253 flow. Second operand 16 states and 363 transitions. [2023-11-29 06:16:15,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 76 transitions, 562 flow [2023-11-29 06:16:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 76 transitions, 525 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-29 06:16:15,316 INFO L231 Difference]: Finished difference. Result has 114 places, 47 transitions, 324 flow [2023-11-29 06:16:15,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=324, PETRI_PLACES=114, PETRI_TRANSITIONS=47} [2023-11-29 06:16:15,316 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 79 predicate places. [2023-11-29 06:16:15,317 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 47 transitions, 324 flow [2023-11-29 06:16:15,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:15,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:15,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:15,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 06:16:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 06:16:15,517 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:15,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:15,518 INFO L85 PathProgramCache]: Analyzing trace with hash 348545020, now seen corresponding path program 42 times [2023-11-29 06:16:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:15,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092793263] [2023-11-29 06:16:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092793263] [2023-11-29 06:16:15,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092793263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20936652] [2023-11-29 06:16:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:16:15,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:15,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:15,632 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:15,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 06:16:15,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:16:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:15,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:16:15,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:15,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20936652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:15,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 24 [2023-11-29 06:16:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859150184] [2023-11-29 06:16:15,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:16:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:16:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:16:15,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:15,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 47 transitions, 324 flow. Second operand has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:15,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:15,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:16,137 INFO L124 PetriNetUnfolderBase]: 64/182 cut-off events. [2023-11-29 06:16:16,137 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2023-11-29 06:16:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 182 events. 64/182 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 569 event pairs, 2 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 782. Up to 106 conditions per place. [2023-11-29 06:16:16,138 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 45 selfloop transitions, 17 changer transitions 5/75 dead transitions. [2023-11-29 06:16:16,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 75 transitions, 591 flow [2023-11-29 06:16:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:16:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:16:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 355 transitions. [2023-11-29 06:16:16,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6723484848484849 [2023-11-29 06:16:16,139 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 355 transitions. [2023-11-29 06:16:16,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 355 transitions. [2023-11-29 06:16:16,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:16,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 355 transitions. [2023-11-29 06:16:16,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 22.1875) internal successors, (355), 16 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,141 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,141 INFO L175 Difference]: Start difference. First operand has 114 places, 47 transitions, 324 flow. Second operand 16 states and 355 transitions. [2023-11-29 06:16:16,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 75 transitions, 591 flow [2023-11-29 06:16:16,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 75 transitions, 547 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-11-29 06:16:16,144 INFO L231 Difference]: Finished difference. Result has 124 places, 54 transitions, 369 flow [2023-11-29 06:16:16,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=369, PETRI_PLACES=124, PETRI_TRANSITIONS=54} [2023-11-29 06:16:16,145 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 89 predicate places. [2023-11-29 06:16:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 54 transitions, 369 flow [2023-11-29 06:16:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:16,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:16,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-29 06:16:16,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-11-29 06:16:16,346 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:16,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 694955071, now seen corresponding path program 43 times [2023-11-29 06:16:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:16,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995959340] [2023-11-29 06:16:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:16,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:16,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995959340] [2023-11-29 06:16:16,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995959340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43728870] [2023-11-29 06:16:16,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:16:16,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:16,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:16,407 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:16,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 06:16:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:16,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:16:16,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:16,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43728870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:16,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2023-11-29 06:16:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327910063] [2023-11-29 06:16:16,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:16:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:16:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:16:16,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:16,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 54 transitions, 369 flow. Second operand has 26 states, 26 states have (on average 20.807692307692307) internal successors, (541), 26 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:16,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:16,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:16,898 INFO L124 PetriNetUnfolderBase]: 64/182 cut-off events. [2023-11-29 06:16:16,898 INFO L125 PetriNetUnfolderBase]: For 434/436 co-relation queries the response was YES. [2023-11-29 06:16:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 182 events. 64/182 cut-off events. For 434/436 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 577 event pairs, 0 based on Foata normal form. 4/186 useless extension candidates. Maximal degree in co-relation 794. Up to 40 conditions per place. [2023-11-29 06:16:16,899 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 43 selfloop transitions, 22 changer transitions 19/92 dead transitions. [2023-11-29 06:16:16,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 92 transitions, 721 flow [2023-11-29 06:16:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:16:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:16:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 412 transitions. [2023-11-29 06:16:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6936026936026936 [2023-11-29 06:16:16,900 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 412 transitions. [2023-11-29 06:16:16,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 412 transitions. [2023-11-29 06:16:16,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:16,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 412 transitions. [2023-11-29 06:16:16,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 22.88888888888889) internal successors, (412), 18 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,902 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,902 INFO L175 Difference]: Start difference. First operand has 124 places, 54 transitions, 369 flow. Second operand 18 states and 412 transitions. [2023-11-29 06:16:16,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 92 transitions, 721 flow [2023-11-29 06:16:16,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 92 transitions, 681 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-29 06:16:16,906 INFO L231 Difference]: Finished difference. Result has 135 places, 49 transitions, 349 flow [2023-11-29 06:16:16,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=349, PETRI_PLACES=135, PETRI_TRANSITIONS=49} [2023-11-29 06:16:16,906 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2023-11-29 06:16:16,906 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 49 transitions, 349 flow [2023-11-29 06:16:16,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 20.807692307692307) internal successors, (541), 26 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:16,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:16,906 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:16,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 06:16:17,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-29 06:16:17,107 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:17,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:17,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1838689076, now seen corresponding path program 44 times [2023-11-29 06:16:17,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:17,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347190415] [2023-11-29 06:16:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:17,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347190415] [2023-11-29 06:16:17,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347190415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876807427] [2023-11-29 06:16:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:16:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:17,173 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:17,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 06:16:17,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:16:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:17,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:16:17,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:17,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:17,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876807427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:17,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:17,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2023-11-29 06:16:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856342354] [2023-11-29 06:16:17,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:17,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:16:17,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:16:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:16:17,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:17,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 49 transitions, 349 flow. Second operand has 26 states, 26 states have (on average 20.807692307692307) internal successors, (541), 26 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:17,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:17,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:17,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:17,719 INFO L124 PetriNetUnfolderBase]: 53/151 cut-off events. [2023-11-29 06:16:17,719 INFO L125 PetriNetUnfolderBase]: For 381/381 co-relation queries the response was YES. [2023-11-29 06:16:17,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 151 events. 53/151 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 410 event pairs, 1 based on Foata normal form. 3/154 useless extension candidates. Maximal degree in co-relation 645. Up to 31 conditions per place. [2023-11-29 06:16:17,720 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 17 changer transitions 9/74 dead transitions. [2023-11-29 06:16:17,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 74 transitions, 568 flow [2023-11-29 06:16:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:16:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:16:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 361 transitions. [2023-11-29 06:16:17,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6837121212121212 [2023-11-29 06:16:17,721 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 361 transitions. [2023-11-29 06:16:17,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 361 transitions. [2023-11-29 06:16:17,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:17,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 361 transitions. [2023-11-29 06:16:17,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:17,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:17,722 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:17,722 INFO L175 Difference]: Start difference. First operand has 135 places, 49 transitions, 349 flow. Second operand 16 states and 361 transitions. [2023-11-29 06:16:17,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 74 transitions, 568 flow [2023-11-29 06:16:17,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 74 transitions, 507 flow, removed 9 selfloop flow, removed 16 redundant places. [2023-11-29 06:16:17,726 INFO L231 Difference]: Finished difference. Result has 128 places, 44 transitions, 305 flow [2023-11-29 06:16:17,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=305, PETRI_PLACES=128, PETRI_TRANSITIONS=44} [2023-11-29 06:16:17,726 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 93 predicate places. [2023-11-29 06:16:17,727 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 44 transitions, 305 flow [2023-11-29 06:16:17,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 20.807692307692307) internal successors, (541), 26 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:17,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:17,727 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:17,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 06:16:17,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 06:16:17,927 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:17,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash 417228525, now seen corresponding path program 45 times [2023-11-29 06:16:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:17,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647427996] [2023-11-29 06:16:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:18,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647427996] [2023-11-29 06:16:18,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647427996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173357241] [2023-11-29 06:16:18,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:16:18,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:18,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:18,084 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:18,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 06:16:18,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:16:18,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:18,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:16:18,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 06:16:18,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:16:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173357241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:16:18,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:16:18,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2023-11-29 06:16:18,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300797447] [2023-11-29 06:16:18,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:16:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:16:18,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:16:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:16:18,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:18,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 44 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:18,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:18,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:18,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:18,257 INFO L124 PetriNetUnfolderBase]: 45/127 cut-off events. [2023-11-29 06:16:18,257 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2023-11-29 06:16:18,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 127 events. 45/127 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 302 event pairs, 6 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 528. Up to 67 conditions per place. [2023-11-29 06:16:18,258 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 22 selfloop transitions, 1 changer transitions 21/52 dead transitions. [2023-11-29 06:16:18,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 52 transitions, 412 flow [2023-11-29 06:16:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:16:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:16:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2023-11-29 06:16:18,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2023-11-29 06:16:18,259 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 140 transitions. [2023-11-29 06:16:18,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 140 transitions. [2023-11-29 06:16:18,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:18,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 140 transitions. [2023-11-29 06:16:18,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:18,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:18,260 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:18,260 INFO L175 Difference]: Start difference. First operand has 128 places, 44 transitions, 305 flow. Second operand 6 states and 140 transitions. [2023-11-29 06:16:18,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 52 transitions, 412 flow [2023-11-29 06:16:18,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 52 transitions, 376 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-11-29 06:16:18,263 INFO L231 Difference]: Finished difference. Result has 115 places, 30 transitions, 156 flow [2023-11-29 06:16:18,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=115, PETRI_TRANSITIONS=30} [2023-11-29 06:16:18,264 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 80 predicate places. [2023-11-29 06:16:18,264 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 30 transitions, 156 flow [2023-11-29 06:16:18,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:18,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:18,264 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:18,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 06:16:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 06:16:18,464 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:18,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1382214581, now seen corresponding path program 46 times [2023-11-29 06:16:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648500259] [2023-11-29 06:16:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:18,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648500259] [2023-11-29 06:16:18,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648500259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515239892] [2023-11-29 06:16:18,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:16:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:18,604 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:18,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 06:16:18,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:16:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:18,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:16:18,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:18,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:19,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515239892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:19,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:19,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 29 [2023-11-29 06:16:19,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447328026] [2023-11-29 06:16:19,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:19,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:16:19,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:16:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:16:19,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:19,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 30 transitions, 156 flow. Second operand has 30 states, 30 states have (on average 20.866666666666667) internal successors, (626), 30 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:19,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:19,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:19,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:19,262 INFO L124 PetriNetUnfolderBase]: 31/99 cut-off events. [2023-11-29 06:16:19,262 INFO L125 PetriNetUnfolderBase]: For 278/278 co-relation queries the response was YES. [2023-11-29 06:16:19,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 99 events. 31/99 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 181 event pairs, 2 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 414. Up to 22 conditions per place. [2023-11-29 06:16:19,263 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 28 selfloop transitions, 19 changer transitions 5/60 dead transitions. [2023-11-29 06:16:19,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 60 transitions, 416 flow [2023-11-29 06:16:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:16:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:16:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 414 transitions. [2023-11-29 06:16:19,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602870813397129 [2023-11-29 06:16:19,264 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 414 transitions. [2023-11-29 06:16:19,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 414 transitions. [2023-11-29 06:16:19,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:19,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 414 transitions. [2023-11-29 06:16:19,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 21.789473684210527) internal successors, (414), 19 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:19,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:19,266 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:19,266 INFO L175 Difference]: Start difference. First operand has 115 places, 30 transitions, 156 flow. Second operand 19 states and 414 transitions. [2023-11-29 06:16:19,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 60 transitions, 416 flow [2023-11-29 06:16:19,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 60 transitions, 365 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-29 06:16:19,269 INFO L231 Difference]: Finished difference. Result has 110 places, 38 transitions, 224 flow [2023-11-29 06:16:19,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=224, PETRI_PLACES=110, PETRI_TRANSITIONS=38} [2023-11-29 06:16:19,269 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 75 predicate places. [2023-11-29 06:16:19,269 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 38 transitions, 224 flow [2023-11-29 06:16:19,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 20.866666666666667) internal successors, (626), 30 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:19,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:19,270 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:19,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 06:16:19,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:19,470 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:19,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1034104241, now seen corresponding path program 47 times [2023-11-29 06:16:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:19,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890816374] [2023-11-29 06:16:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:19,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890816374] [2023-11-29 06:16:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890816374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889741286] [2023-11-29 06:16:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:16:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:19,565 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:19,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 06:16:19,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 06:16:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:19,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:16:19,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:19,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:19,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889741286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:19,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:19,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 30 [2023-11-29 06:16:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997275291] [2023-11-29 06:16:19,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:16:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:16:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:16:19,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:19,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 38 transitions, 224 flow. Second operand has 31 states, 31 states have (on average 20.70967741935484) internal successors, (642), 31 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:19,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:19,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:19,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:20,094 INFO L124 PetriNetUnfolderBase]: 31/106 cut-off events. [2023-11-29 06:16:20,095 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-29 06:16:20,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 106 events. 31/106 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 2 based on Foata normal form. 3/109 useless extension candidates. Maximal degree in co-relation 451. Up to 26 conditions per place. [2023-11-29 06:16:20,095 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 23 selfloop transitions, 8 changer transitions 19/58 dead transitions. [2023-11-29 06:16:20,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 58 transitions, 423 flow [2023-11-29 06:16:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:16:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:16:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 330 transitions. [2023-11-29 06:16:20,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 06:16:20,096 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 330 transitions. [2023-11-29 06:16:20,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 330 transitions. [2023-11-29 06:16:20,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:20,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 330 transitions. [2023-11-29 06:16:20,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:20,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:20,097 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:20,097 INFO L175 Difference]: Start difference. First operand has 110 places, 38 transitions, 224 flow. Second operand 15 states and 330 transitions. [2023-11-29 06:16:20,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 58 transitions, 423 flow [2023-11-29 06:16:20,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 58 transitions, 371 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-29 06:16:20,099 INFO L231 Difference]: Finished difference. Result has 114 places, 32 transitions, 161 flow [2023-11-29 06:16:20,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=161, PETRI_PLACES=114, PETRI_TRANSITIONS=32} [2023-11-29 06:16:20,099 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 79 predicate places. [2023-11-29 06:16:20,099 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 32 transitions, 161 flow [2023-11-29 06:16:20,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 20.70967741935484) internal successors, (642), 31 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:20,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:20,100 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:20,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 06:16:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-29 06:16:20,300 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:20,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1657413532, now seen corresponding path program 48 times [2023-11-29 06:16:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:20,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275590878] [2023-11-29 06:16:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:20,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275590878] [2023-11-29 06:16:20,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275590878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:20,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831333138] [2023-11-29 06:16:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:16:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:20,484 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:20,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 06:16:20,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:16:20,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:20,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:16:20,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:20,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831333138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:20,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:20,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 34 [2023-11-29 06:16:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907562395] [2023-11-29 06:16:20,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 06:16:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 06:16:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 06:16:20,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:20,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 32 transitions, 161 flow. Second operand has 35 states, 35 states have (on average 20.771428571428572) internal successors, (727), 35 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:20,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:20,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:20,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:21,136 INFO L124 PetriNetUnfolderBase]: 34/108 cut-off events. [2023-11-29 06:16:21,136 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-29 06:16:21,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 108 events. 34/108 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 2 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 435. Up to 25 conditions per place. [2023-11-29 06:16:21,137 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 31 selfloop transitions, 22 changer transitions 5/66 dead transitions. [2023-11-29 06:16:21,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 66 transitions, 431 flow [2023-11-29 06:16:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:16:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:16:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 477 transitions. [2023-11-29 06:16:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6570247933884298 [2023-11-29 06:16:21,138 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 477 transitions. [2023-11-29 06:16:21,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 477 transitions. [2023-11-29 06:16:21,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:21,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 477 transitions. [2023-11-29 06:16:21,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 21.681818181818183) internal successors, (477), 22 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:21,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 33.0) internal successors, (759), 23 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:21,140 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 33.0) internal successors, (759), 23 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:21,140 INFO L175 Difference]: Start difference. First operand has 114 places, 32 transitions, 161 flow. Second operand 22 states and 477 transitions. [2023-11-29 06:16:21,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 66 transitions, 431 flow [2023-11-29 06:16:21,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 66 transitions, 408 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-29 06:16:21,141 INFO L231 Difference]: Finished difference. Result has 118 places, 41 transitions, 249 flow [2023-11-29 06:16:21,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=249, PETRI_PLACES=118, PETRI_TRANSITIONS=41} [2023-11-29 06:16:21,142 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 83 predicate places. [2023-11-29 06:16:21,142 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 41 transitions, 249 flow [2023-11-29 06:16:21,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 20.771428571428572) internal successors, (727), 35 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:21,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:21,142 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:21,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 06:16:21,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:21,343 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:21,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash 930838154, now seen corresponding path program 49 times [2023-11-29 06:16:21,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:21,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627810287] [2023-11-29 06:16:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:21,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:21,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627810287] [2023-11-29 06:16:21,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627810287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140083457] [2023-11-29 06:16:21,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:16:21,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:21,460 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:21,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 06:16:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:21,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:16:21,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:21,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:21,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140083457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:21,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:21,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 35 [2023-11-29 06:16:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372195647] [2023-11-29 06:16:21,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:21,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 06:16:21,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:21,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 06:16:21,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:16:21,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:21,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 41 transitions, 249 flow. Second operand has 36 states, 36 states have (on average 20.63888888888889) internal successors, (743), 36 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:21,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:21,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:21,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:22,076 INFO L124 PetriNetUnfolderBase]: 34/115 cut-off events. [2023-11-29 06:16:22,076 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-29 06:16:22,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 115 events. 34/115 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 240 event pairs, 2 based on Foata normal form. 3/118 useless extension candidates. Maximal degree in co-relation 497. Up to 29 conditions per place. [2023-11-29 06:16:22,077 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 9 changer transitions 21/63 dead transitions. [2023-11-29 06:16:22,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 63 transitions, 468 flow [2023-11-29 06:16:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:16:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:16:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 372 transitions. [2023-11-29 06:16:22,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631016042780749 [2023-11-29 06:16:22,078 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 372 transitions. [2023-11-29 06:16:22,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 372 transitions. [2023-11-29 06:16:22,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:22,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 372 transitions. [2023-11-29 06:16:22,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 21.88235294117647) internal successors, (372), 17 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:22,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:22,080 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:22,080 INFO L175 Difference]: Start difference. First operand has 118 places, 41 transitions, 249 flow. Second operand 17 states and 372 transitions. [2023-11-29 06:16:22,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 63 transitions, 468 flow [2023-11-29 06:16:22,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 63 transitions, 408 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-11-29 06:16:22,083 INFO L231 Difference]: Finished difference. Result has 122 places, 34 transitions, 176 flow [2023-11-29 06:16:22,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=176, PETRI_PLACES=122, PETRI_TRANSITIONS=34} [2023-11-29 06:16:22,083 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2023-11-29 06:16:22,083 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 34 transitions, 176 flow [2023-11-29 06:16:22,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 20.63888888888889) internal successors, (743), 36 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:22,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:22,084 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:22,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 06:16:22,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 06:16:22,284 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:22,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1486026417, now seen corresponding path program 50 times [2023-11-29 06:16:22,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:22,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050611770] [2023-11-29 06:16:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:22,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050611770] [2023-11-29 06:16:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050611770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313863090] [2023-11-29 06:16:22,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:16:22,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:22,483 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:22,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 06:16:22,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:16:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:22,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:16:22,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:22,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:16:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:16:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313863090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:16:22,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:16:22,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 9] total 39 [2023-11-29 06:16:22,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53973461] [2023-11-29 06:16:22,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:16:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 06:16:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 06:16:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 06:16:22,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:22,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 34 transitions, 176 flow. Second operand has 40 states, 40 states have (on average 20.7) internal successors, (828), 40 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:22,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:23,290 INFO L124 PetriNetUnfolderBase]: 37/117 cut-off events. [2023-11-29 06:16:23,290 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-11-29 06:16:23,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 117 events. 37/117 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 2 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 477. Up to 28 conditions per place. [2023-11-29 06:16:23,291 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 34 selfloop transitions, 25 changer transitions 5/72 dead transitions. [2023-11-29 06:16:23,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 72 transitions, 476 flow [2023-11-29 06:16:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:16:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:16:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 540 transitions. [2023-11-29 06:16:23,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2023-11-29 06:16:23,292 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 540 transitions. [2023-11-29 06:16:23,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 540 transitions. [2023-11-29 06:16:23,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:23,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 540 transitions. [2023-11-29 06:16:23,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 21.6) internal successors, (540), 25 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 33.0) internal successors, (858), 26 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,294 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 33.0) internal successors, (858), 26 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,294 INFO L175 Difference]: Start difference. First operand has 122 places, 34 transitions, 176 flow. Second operand 25 states and 540 transitions. [2023-11-29 06:16:23,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 72 transitions, 476 flow [2023-11-29 06:16:23,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 72 transitions, 451 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-29 06:16:23,296 INFO L231 Difference]: Finished difference. Result has 126 places, 44 transitions, 274 flow [2023-11-29 06:16:23,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=274, PETRI_PLACES=126, PETRI_TRANSITIONS=44} [2023-11-29 06:16:23,296 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 91 predicate places. [2023-11-29 06:16:23,296 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 44 transitions, 274 flow [2023-11-29 06:16:23,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 20.7) internal successors, (828), 40 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:16:23,297 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:16:23,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-29 06:16:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 06:16:23,497 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:16:23,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:16:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 765698669, now seen corresponding path program 51 times [2023-11-29 06:16:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:16:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065859201] [2023-11-29 06:16:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:16:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:16:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:16:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:16:23,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:16:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065859201] [2023-11-29 06:16:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065859201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:16:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705423075] [2023-11-29 06:16:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:16:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:16:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:16:23,612 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:16:23,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 06:16:23,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:16:23,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:16:23,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:16:23,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:16:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 06:16:23,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:16:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705423075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:16:23,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:16:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-11-29 06:16:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115293675] [2023-11-29 06:16:23,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:16:23,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:16:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:16:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:16:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:16:23,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 33 [2023-11-29 06:16:23,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 44 transitions, 274 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:16:23,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 33 [2023-11-29 06:16:23,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:16:23,790 INFO L124 PetriNetUnfolderBase]: 35/109 cut-off events. [2023-11-29 06:16:23,790 INFO L125 PetriNetUnfolderBase]: For 132/134 co-relation queries the response was YES. [2023-11-29 06:16:23,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 109 events. 35/109 cut-off events. For 132/134 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 213 event pairs, 0 based on Foata normal form. 3/112 useless extension candidates. Maximal degree in co-relation 477. Up to 49 conditions per place. [2023-11-29 06:16:23,791 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-11-29 06:16:23,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 47 transitions, 359 flow [2023-11-29 06:16:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:16:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:16:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2023-11-29 06:16:23,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2023-11-29 06:16:23,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 133 transitions. [2023-11-29 06:16:23,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 133 transitions. [2023-11-29 06:16:23,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:16:23,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 133 transitions. [2023-11-29 06:16:23,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,793 INFO L175 Difference]: Start difference. First operand has 126 places, 44 transitions, 274 flow. Second operand 6 states and 133 transitions. [2023-11-29 06:16:23,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 47 transitions, 359 flow [2023-11-29 06:16:23,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 47 transitions, 291 flow, removed 11 selfloop flow, removed 16 redundant places. [2023-11-29 06:16:23,795 INFO L231 Difference]: Finished difference. Result has 113 places, 0 transitions, 0 flow [2023-11-29 06:16:23,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=113, PETRI_TRANSITIONS=0} [2023-11-29 06:16:23,795 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2023-11-29 06:16:23,795 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 0 transitions, 0 flow [2023-11-29 06:16:23,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:16:23,797 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-11-29 06:16:23,798 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-11-29 06:16:23,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-11-29 06:16:23,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-11-29 06:16:23,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 06:16:23,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 06:16:23,999 INFO L445 BasicCegarLoop]: Path program histogram: [51, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 06:16:24,002 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 06:16:24,002 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:16:24,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:16:24 BasicIcfg [2023-11-29 06:16:24,005 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:16:24,006 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:16:24,006 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:16:24,006 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:16:24,006 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:15:05" (3/4) ... [2023-11-29 06:16:24,008 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 06:16:24,010 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-29 06:16:24,010 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-29 06:16:24,014 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 56 nodes and edges [2023-11-29 06:16:24,014 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-29 06:16:24,014 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-29 06:16:24,014 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-29 06:16:24,078 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:16:24,079 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 06:16:24,079 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:16:24,079 INFO L158 Benchmark]: Toolchain (without parser) took 79568.82ms. Allocated memory was 153.1MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 116.0MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 767.6MB. Max. memory is 16.1GB. [2023-11-29 06:16:24,079 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:16:24,080 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.59ms. Allocated memory is still 153.1MB. Free memory was 116.0MB in the beginning and 105.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 06:16:24,080 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.65ms. Allocated memory is still 153.1MB. Free memory was 105.1MB in the beginning and 103.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:16:24,080 INFO L158 Benchmark]: Boogie Preprocessor took 44.54ms. Allocated memory is still 153.1MB. Free memory was 103.4MB in the beginning and 101.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:16:24,080 INFO L158 Benchmark]: RCFGBuilder took 500.40ms. Allocated memory is still 153.1MB. Free memory was 101.3MB in the beginning and 76.9MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-11-29 06:16:24,081 INFO L158 Benchmark]: TraceAbstraction took 78692.45ms. Allocated memory was 153.1MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 76.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 723.6MB. Max. memory is 16.1GB. [2023-11-29 06:16:24,081 INFO L158 Benchmark]: Witness Printer took 72.94ms. Allocated memory is still 1.9GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:16:24,082 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.59ms. Allocated memory is still 153.1MB. Free memory was 116.0MB in the beginning and 105.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.65ms. Allocated memory is still 153.1MB. Free memory was 105.1MB in the beginning and 103.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.54ms. Allocated memory is still 153.1MB. Free memory was 103.4MB in the beginning and 101.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 500.40ms. Allocated memory is still 153.1MB. Free memory was 101.3MB in the beginning and 76.9MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 78692.45ms. Allocated memory was 153.1MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 76.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 723.6MB. Max. memory is 16.1GB. * Witness Printer took 72.94ms. Allocated memory is still 1.9GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 56]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 40 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 78.6s, OverallIterations: 60, TraceHistogramMax: 8, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.0s, AutomataDifference: 49.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3500 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3428 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 742 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10042 IncrementalHoareTripleChecker+Invalid, 10784 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 742 mSolverCounterUnsat, 21 mSDtfsCounter, 10042 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3019 GetRequests, 1864 SyntacticMatches, 35 SemanticMatches, 1120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8655 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28635occurred in iteration=44, InterpolantAutomatonStates: 772, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 2605 NumberOfCodeBlocks, 2581 NumberOfCodeBlocksAsserted, 187 NumberOfCheckSat, 3545 ConstructedInterpolants, 0 QuantifiedInterpolants, 15495 SizeOfPredicates, 13 NumberOfNonLiveVariables, 7704 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 158 InterpolantComputations, 15 PerfectInterpolantSequences, 913/2204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 06:16:24,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_549fab0b-bc04-4466-9969-3fdac418871b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE