./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/clever.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_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:44:43,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:44:43,666 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:44:43,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:44:43,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:44:43,699 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:44:43,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:44:43,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:44:43,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:44:43,707 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:44:43,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:44:43,709 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:44:43,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:44:43,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:44:43,712 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:44:43,713 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:44:43,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:44:43,714 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:44:43,714 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:44:43,714 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:44:43,715 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:44:43,716 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:44:43,716 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:44:43,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:44:43,717 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:44:43,717 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:44:43,718 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:44:43,718 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:44:43,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:44:43,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:44:43,721 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:44:43,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:44:43,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:43,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:44:43,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:44:43,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:44:43,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:44:43,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:44:43,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:44:43,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:44:43,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:44:43,724 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_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2023-11-24 21:44:44,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:44:44,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:44:44,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:44:44,116 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:44:44,117 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:44:44,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/clever.wvr.c [2023-11-24 21:44:47,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:44:47,340 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:44:47,352 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/sv-benchmarks/c/weaver/clever.wvr.c [2023-11-24 21:44:47,361 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/data/d3d31f0f0/8daa2cb3b45d40e192084f911d90530c/FLAG0461d1259 [2023-11-24 21:44:47,396 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/data/d3d31f0f0/8daa2cb3b45d40e192084f911d90530c [2023-11-24 21:44:47,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:44:47,437 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:44:47,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:47,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:44:47,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:44:47,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4989581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47, skipping insertion in model container [2023-11-24 21:44:47,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,498 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:47,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:47,743 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:44:47,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:47,809 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:44:47,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47 WrapperNode [2023-11-24 21:44:47,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:47,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:47,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:44:47,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:44:47,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,858 INFO L138 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2023-11-24 21:44:47,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:47,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:44:47,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:44:47,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:44:47,872 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,875 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,899 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 21:44:47,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,908 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,917 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:44:47,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:44:47,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:44:47,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:44:47,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (1/1) ... [2023-11-24 21:44:47,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:47,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:47,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:44:48,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:44:48,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:44:48,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:44:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:44:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:44:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:44:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:44:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:44:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:44:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:44:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:44:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:44:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:44:48,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:44:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:44:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:44:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:44:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:44:48,037 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:44:48,203 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:44:48,205 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:44:48,522 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:44:48,866 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:44:48,867 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:44:48,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:48 BoogieIcfgContainer [2023-11-24 21:44:48,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:44:48,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:44:48,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:44:48,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:44:48,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:44:47" (1/3) ... [2023-11-24 21:44:48,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f112a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:48, skipping insertion in model container [2023-11-24 21:44:48,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:47" (2/3) ... [2023-11-24 21:44:48,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f112a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:48, skipping insertion in model container [2023-11-24 21:44:48,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:48" (3/3) ... [2023-11-24 21:44:48,878 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-11-24 21:44:48,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:44:48,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-24 21:44:48,899 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:44:48,942 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:44:48,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2023-11-24 21:44:49,009 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-11-24 21:44:49,009 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:44:49,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2023-11-24 21:44:49,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2023-11-24 21:44:49,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2023-11-24 21:44:49,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:49,044 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;@6b107f9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:49,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-24 21:44:49,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:49,049 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:44:49,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:49,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:49,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:44:49,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:49,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash 11151, now seen corresponding path program 1 times [2023-11-24 21:44:49,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:49,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270340167] [2023-11-24 21:44:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:49,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:49,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270340167] [2023-11-24 21:44:49,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270340167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:49,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:49,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996124254] [2023-11-24 21:44:49,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:49,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:49,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2023-11-24 21:44:49,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2023-11-24 21:44:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:49,760 INFO L124 PetriNetUnfolderBase]: 95/177 cut-off events. [2023-11-24 21:44:49,760 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 21:44:49,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 177 events. 95/177 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 542 event pairs, 41 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 289. Up to 142 conditions per place. [2023-11-24 21:44:49,765 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 15 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-24 21:44:49,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 100 flow [2023-11-24 21:44:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-24 21:44:49,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-24 21:44:49,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-24 21:44:49,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-24 21:44:49,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:49,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-24 21:44:49,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:49,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:49,799 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 64 transitions. [2023-11-24 21:44:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 100 flow [2023-11-24 21:44:49,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:44:49,806 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 62 flow [2023-11-24 21:44:49,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-24 21:44:49,813 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2023-11-24 21:44:49,813 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 62 flow [2023-11-24 21:44:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:49,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:44:49,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:44:49,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:49,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash 11152, now seen corresponding path program 1 times [2023-11-24 21:44:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348133569] [2023-11-24 21:44:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:49,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348133569] [2023-11-24 21:44:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348133569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:49,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:49,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757711348] [2023-11-24 21:44:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:50,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-24 21:44:50,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:50,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-24 21:44:50,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:50,075 INFO L124 PetriNetUnfolderBase]: 61/126 cut-off events. [2023-11-24 21:44:50,075 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:44:50,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 126 events. 61/126 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 350 event pairs, 24 based on Foata normal form. 13/88 useless extension candidates. Maximal degree in co-relation 224. Up to 95 conditions per place. [2023-11-24 21:44:50,078 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-24 21:44:50,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 86 flow [2023-11-24 21:44:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-24 21:44:50,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2023-11-24 21:44:50,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-24 21:44:50,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-24 21:44:50,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:50,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-24 21:44:50,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-24 21:44:50,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,084 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 62 flow. Second operand 3 states and 67 transitions. [2023-11-24 21:44:50,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 86 flow [2023-11-24 21:44:50,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:50,086 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 59 flow [2023-11-24 21:44:50,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=57, 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=59, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-11-24 21:44:50,088 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-24 21:44:50,088 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 59 flow [2023-11-24 21:44:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:50,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:50,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:44:50,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:50,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash 332495519, now seen corresponding path program 1 times [2023-11-24 21:44:50,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:50,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074140284] [2023-11-24 21:44:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:50,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074140284] [2023-11-24 21:44:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074140284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:50,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591300973] [2023-11-24 21:44:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:50,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2023-11-24 21:44:50,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:50,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2023-11-24 21:44:50,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:50,245 INFO L124 PetriNetUnfolderBase]: 71/133 cut-off events. [2023-11-24 21:44:50,246 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:44:50,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 133 events. 71/133 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 370 event pairs, 29 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 248. Up to 112 conditions per place. [2023-11-24 21:44:50,248 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 15 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-24 21:44:50,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 87 flow [2023-11-24 21:44:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-24 21:44:50,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-24 21:44:50,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-24 21:44:50,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-24 21:44:50,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:50,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-24 21:44:50,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,253 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 59 flow. Second operand 3 states and 63 transitions. [2023-11-24 21:44:50,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 87 flow [2023-11-24 21:44:50,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:50,255 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 56 flow [2023-11-24 21:44:50,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=54, 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=56, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-24 21:44:50,257 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -8 predicate places. [2023-11-24 21:44:50,257 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 56 flow [2023-11-24 21:44:50,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:50,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:50,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:44:50,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:50,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash 332495520, now seen corresponding path program 1 times [2023-11-24 21:44:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353003574] [2023-11-24 21:44:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:50,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353003574] [2023-11-24 21:44:50,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353003574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:50,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:50,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:50,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938500775] [2023-11-24 21:44:50,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:50,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:50,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:50,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-24 21:44:50,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:50,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-24 21:44:50,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:50,446 INFO L124 PetriNetUnfolderBase]: 61/116 cut-off events. [2023-11-24 21:44:50,447 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:44:50,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 116 events. 61/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 308 event pairs, 24 based on Foata normal form. 7/82 useless extension candidates. Maximal degree in co-relation 214. Up to 95 conditions per place. [2023-11-24 21:44:50,449 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 13 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-24 21:44:50,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 80 flow [2023-11-24 21:44:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-24 21:44:50,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2023-11-24 21:44:50,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-24 21:44:50,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-24 21:44:50,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:50,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-24 21:44:50,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-24 21:44:50,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,455 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 56 flow. Second operand 3 states and 67 transitions. [2023-11-24 21:44:50,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 80 flow [2023-11-24 21:44:50,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:50,457 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 53 flow [2023-11-24 21:44:50,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=51, 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=53, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-24 21:44:50,458 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -9 predicate places. [2023-11-24 21:44:50,458 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 53 flow [2023-11-24 21:44:50,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:50,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:50,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:44:50,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:50,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash 828415284, now seen corresponding path program 1 times [2023-11-24 21:44:50,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859955298] [2023-11-24 21:44:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859955298] [2023-11-24 21:44:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859955298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:50,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:44:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966292571] [2023-11-24 21:44:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:50,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:50,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 53 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) [2023-11-24 21:44:50,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:50,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:50,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:50,864 INFO L124 PetriNetUnfolderBase]: 106/189 cut-off events. [2023-11-24 21:44:50,864 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-24 21:44:50,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 189 events. 106/189 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 613 event pairs, 19 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 361. Up to 110 conditions per place. [2023-11-24 21:44:50,871 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 21 selfloop transitions, 3 changer transitions 1/33 dead transitions. [2023-11-24 21:44:50,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 128 flow [2023-11-24 21:44:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-24 21:44:50,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7904761904761904 [2023-11-24 21:44:50,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-24 21:44:50,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-24 21:44:50,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:50,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-24 21:44:50,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2023-11-24 21:44:50,879 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 53 flow. Second operand 3 states and 83 transitions. [2023-11-24 21:44:50,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 128 flow [2023-11-24 21:44:50,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:50,881 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 71 flow [2023-11-24 21:44:50,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-11-24 21:44:50,884 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-24 21:44:50,885 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 71 flow [2023-11-24 21:44:50,885 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) [2023-11-24 21:44:50,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:50,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:50,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:44:50,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:50,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:50,888 INFO L85 PathProgramCache]: Analyzing trace with hash -401151936, now seen corresponding path program 1 times [2023-11-24 21:44:50,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:50,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224127114] [2023-11-24 21:44:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:51,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224127114] [2023-11-24 21:44:51,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224127114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:51,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:51,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408953398] [2023-11-24 21:44:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:51,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:51,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:51,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 71 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) [2023-11-24 21:44:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:51,160 INFO L124 PetriNetUnfolderBase]: 145/264 cut-off events. [2023-11-24 21:44:51,160 INFO L125 PetriNetUnfolderBase]: For 56/62 co-relation queries the response was YES. [2023-11-24 21:44:51,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 264 events. 145/264 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 954 event pairs, 12 based on Foata normal form. 9/243 useless extension candidates. Maximal degree in co-relation 594. Up to 96 conditions per place. [2023-11-24 21:44:51,166 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 37 selfloop transitions, 7 changer transitions 2/54 dead transitions. [2023-11-24 21:44:51,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 54 transitions, 250 flow [2023-11-24 21:44:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2023-11-24 21:44:51,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7771428571428571 [2023-11-24 21:44:51,170 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 136 transitions. [2023-11-24 21:44:51,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 136 transitions. [2023-11-24 21:44:51,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:51,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 136 transitions. [2023-11-24 21:44:51,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,176 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 71 flow. Second operand 5 states and 136 transitions. [2023-11-24 21:44:51,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 54 transitions, 250 flow [2023-11-24 21:44:51,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:51,181 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 119 flow [2023-11-24 21:44:51,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-24 21:44:51,184 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-24 21:44:51,184 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 119 flow [2023-11-24 21:44:51,185 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) [2023-11-24 21:44:51,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:51,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:51,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:44:51,185 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:51,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash -293513818, now seen corresponding path program 2 times [2023-11-24 21:44:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:51,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452675587] [2023-11-24 21:44:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:51,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:51,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452675587] [2023-11-24 21:44:51,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452675587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:51,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:51,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:51,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979785237] [2023-11-24 21:44:51,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:51,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:51,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 119 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) [2023-11-24 21:44:51,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:51,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:51,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:51,411 INFO L124 PetriNetUnfolderBase]: 146/259 cut-off events. [2023-11-24 21:44:51,411 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-24 21:44:51,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 259 events. 146/259 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 884 event pairs, 14 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 757. Up to 103 conditions per place. [2023-11-24 21:44:51,415 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 31 selfloop transitions, 11 changer transitions 5/55 dead transitions. [2023-11-24 21:44:51,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 313 flow [2023-11-24 21:44:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2023-11-24 21:44:51,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7542857142857143 [2023-11-24 21:44:51,418 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2023-11-24 21:44:51,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2023-11-24 21:44:51,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:51,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2023-11-24 21:44:51,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 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) [2023-11-24 21:44:51,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,425 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 119 flow. Second operand 5 states and 132 transitions. [2023-11-24 21:44:51,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 313 flow [2023-11-24 21:44:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:44:51,431 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 184 flow [2023-11-24 21:44:51,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-11-24 21:44:51,434 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-11-24 21:44:51,434 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 184 flow [2023-11-24 21:44:51,434 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) [2023-11-24 21:44:51,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:51,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:44:51,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:51,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1357748550, now seen corresponding path program 1 times [2023-11-24 21:44:51,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:51,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747326773] [2023-11-24 21:44:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:51,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:51,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747326773] [2023-11-24 21:44:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747326773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190243054] [2023-11-24 21:44:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:51,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:51,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:51,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:44:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:51,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:44:51,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:51,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190243054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:51,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:51,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-24 21:44:51,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724534327] [2023-11-24 21:44:51,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:51,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:44:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:44:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:44:51,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:51,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:51,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:51,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:52,018 INFO L124 PetriNetUnfolderBase]: 127/237 cut-off events. [2023-11-24 21:44:52,018 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2023-11-24 21:44:52,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 237 events. 127/237 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 2 based on Foata normal form. 18/252 useless extension candidates. Maximal degree in co-relation 839. Up to 91 conditions per place. [2023-11-24 21:44:52,022 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 9 changer transitions 3/61 dead transitions. [2023-11-24 21:44:52,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 423 flow [2023-11-24 21:44:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2023-11-24 21:44:52,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7714285714285715 [2023-11-24 21:44:52,024 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2023-11-24 21:44:52,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2023-11-24 21:44:52,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:52,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2023-11-24 21:44:52,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:52,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:52,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:52,026 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 184 flow. Second operand 5 states and 135 transitions. [2023-11-24 21:44:52,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 423 flow [2023-11-24 21:44:52,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 417 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-24 21:44:52,035 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 256 flow [2023-11-24 21:44:52,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-24 21:44:52,038 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-11-24 21:44:52,038 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 256 flow [2023-11-24 21:44:52,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:52,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:52,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:52,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:44:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:44:52,244 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:52,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash -595033951, now seen corresponding path program 1 times [2023-11-24 21:44:52,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:52,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749377662] [2023-11-24 21:44:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749377662] [2023-11-24 21:44:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749377662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:52,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742842386] [2023-11-24 21:44:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:52,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:52,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:52,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:44:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:52,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:44:52,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:53,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742842386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:53,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:53,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-24 21:44:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559565734] [2023-11-24 21:44:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:44:53,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:44:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:44:53,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:53,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 13 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:53,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:53,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:53,718 INFO L124 PetriNetUnfolderBase]: 249/463 cut-off events. [2023-11-24 21:44:53,718 INFO L125 PetriNetUnfolderBase]: For 784/785 co-relation queries the response was YES. [2023-11-24 21:44:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1829 conditions, 463 events. 249/463 cut-off events. For 784/785 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1884 event pairs, 10 based on Foata normal form. 14/474 useless extension candidates. Maximal degree in co-relation 1805. Up to 176 conditions per place. [2023-11-24 21:44:53,725 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 62 selfloop transitions, 19 changer transitions 21/110 dead transitions. [2023-11-24 21:44:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 110 transitions, 905 flow [2023-11-24 21:44:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:44:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:44:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2023-11-24 21:44:53,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2023-11-24 21:44:53,728 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 245 transitions. [2023-11-24 21:44:53,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 245 transitions. [2023-11-24 21:44:53,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:53,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 245 transitions. [2023-11-24 21:44:53,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:53,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:53,731 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:53,732 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 256 flow. Second operand 9 states and 245 transitions. [2023-11-24 21:44:53,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 110 transitions, 905 flow [2023-11-24 21:44:53,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 110 transitions, 895 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:53,740 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 442 flow [2023-11-24 21:44:53,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=442, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-24 21:44:53,742 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-11-24 21:44:53,742 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 442 flow [2023-11-24 21:44:53,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.76923076923077) internal successors, (283), 13 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:53,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:53,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:53,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:53,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:53,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:53,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:53,950 INFO L85 PathProgramCache]: Analyzing trace with hash 672409142, now seen corresponding path program 2 times [2023-11-24 21:44:53,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949334289] [2023-11-24 21:44:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:54,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:54,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949334289] [2023-11-24 21:44:54,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949334289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:54,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619870714] [2023-11-24 21:44:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:54,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:54,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:54,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 442 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:54,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:54,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:54,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:54,136 INFO L124 PetriNetUnfolderBase]: 192/357 cut-off events. [2023-11-24 21:44:54,136 INFO L125 PetriNetUnfolderBase]: For 1072/1079 co-relation queries the response was YES. [2023-11-24 21:44:54,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1585 conditions, 357 events. 192/357 cut-off events. For 1072/1079 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1299 event pairs, 25 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 1555. Up to 152 conditions per place. [2023-11-24 21:44:54,142 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 53 selfloop transitions, 12 changer transitions 2/75 dead transitions. [2023-11-24 21:44:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 717 flow [2023-11-24 21:44:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2023-11-24 21:44:54,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7371428571428571 [2023-11-24 21:44:54,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 129 transitions. [2023-11-24 21:44:54,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 129 transitions. [2023-11-24 21:44:54,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:54,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 129 transitions. [2023-11-24 21:44:54,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.8) internal successors, (129), 5 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) [2023-11-24 21:44:54,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:54,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:54,146 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 442 flow. Second operand 5 states and 129 transitions. [2023-11-24 21:44:54,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 717 flow [2023-11-24 21:44:54,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 660 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-11-24 21:44:54,155 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 478 flow [2023-11-24 21:44:54,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-24 21:44:54,156 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2023-11-24 21:44:54,156 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 478 flow [2023-11-24 21:44:54,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:54,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:54,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:54,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:44:54,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:54,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:54,158 INFO L85 PathProgramCache]: Analyzing trace with hash 947768309, now seen corresponding path program 2 times [2023-11-24 21:44:54,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:54,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082161427] [2023-11-24 21:44:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:54,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082161427] [2023-11-24 21:44:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082161427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700416467] [2023-11-24 21:44:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:44:54,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:54,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:54,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:44:54,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:44:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:54,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:44:54,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:55,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:55,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700416467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:55,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:55,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-24 21:44:55,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665953106] [2023-11-24 21:44:55,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:55,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:44:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:44:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:44:55,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:55,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 478 flow. Second operand has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:55,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:55,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:55,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:56,438 INFO L124 PetriNetUnfolderBase]: 624/1155 cut-off events. [2023-11-24 21:44:56,438 INFO L125 PetriNetUnfolderBase]: For 4237/4246 co-relation queries the response was YES. [2023-11-24 21:44:56,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5109 conditions, 1155 events. 624/1155 cut-off events. For 4237/4246 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5999 event pairs, 44 based on Foata normal form. 12/1165 useless extension candidates. Maximal degree in co-relation 5077. Up to 300 conditions per place. [2023-11-24 21:44:56,455 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 134 selfloop transitions, 86 changer transitions 11/239 dead transitions. [2023-11-24 21:44:56,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 239 transitions, 2378 flow [2023-11-24 21:44:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:44:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-24 21:44:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 461 transitions. [2023-11-24 21:44:56,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7747899159663866 [2023-11-24 21:44:56,458 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 461 transitions. [2023-11-24 21:44:56,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 461 transitions. [2023-11-24 21:44:56,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:56,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 461 transitions. [2023-11-24 21:44:56,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 27.11764705882353) internal successors, (461), 17 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) [2023-11-24 21:44:56,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,463 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,463 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 478 flow. Second operand 17 states and 461 transitions. [2023-11-24 21:44:56,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 239 transitions, 2378 flow [2023-11-24 21:44:56,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 239 transitions, 2275 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:56,488 INFO L231 Difference]: Finished difference. Result has 89 places, 140 transitions, 1577 flow [2023-11-24 21:44:56,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1577, PETRI_PLACES=89, PETRI_TRANSITIONS=140} [2023-11-24 21:44:56,489 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2023-11-24 21:44:56,489 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 140 transitions, 1577 flow [2023-11-24 21:44:56,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:56,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:56,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:56,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:44:56,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:56,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash -125429439, now seen corresponding path program 3 times [2023-11-24 21:44:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:56,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592655225] [2023-11-24 21:44:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:57,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:57,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592655225] [2023-11-24 21:44:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592655225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:57,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951359948] [2023-11-24 21:44:57,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:44:57,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:57,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:57,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:44:57,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:44:57,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:57,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:44:57,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:57,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951359948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:57,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:57,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-24 21:44:57,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004758145] [2023-11-24 21:44:57,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:44:57,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:44:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:44:57,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:44:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 140 transitions, 1577 flow. Second operand has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:57,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:57,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:44:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:58,936 INFO L124 PetriNetUnfolderBase]: 1342/2507 cut-off events. [2023-11-24 21:44:58,936 INFO L125 PetriNetUnfolderBase]: For 11702/11718 co-relation queries the response was YES. [2023-11-24 21:44:58,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12650 conditions, 2507 events. 1342/2507 cut-off events. For 11702/11718 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15548 event pairs, 119 based on Foata normal form. 7/2511 useless extension candidates. Maximal degree in co-relation 12606. Up to 611 conditions per place. [2023-11-24 21:44:58,975 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 183 selfloop transitions, 151 changer transitions 11/353 dead transitions. [2023-11-24 21:44:58,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 353 transitions, 4475 flow [2023-11-24 21:44:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:44:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:44:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2023-11-24 21:44:58,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7740259740259741 [2023-11-24 21:44:58,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 298 transitions. [2023-11-24 21:44:58,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 298 transitions. [2023-11-24 21:44:58,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:58,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 298 transitions. [2023-11-24 21:44:58,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 27.09090909090909) internal successors, (298), 11 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) [2023-11-24 21:44:58,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:58,983 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:58,983 INFO L175 Difference]: Start difference. First operand has 89 places, 140 transitions, 1577 flow. Second operand 11 states and 298 transitions. [2023-11-24 21:44:58,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 353 transitions, 4475 flow [2023-11-24 21:44:59,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 353 transitions, 4167 flow, removed 151 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:59,053 INFO L231 Difference]: Finished difference. Result has 102 places, 246 transitions, 3271 flow [2023-11-24 21:44:59,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3271, PETRI_PLACES=102, PETRI_TRANSITIONS=246} [2023-11-24 21:44:59,055 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2023-11-24 21:44:59,055 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 246 transitions, 3271 flow [2023-11-24 21:44:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:59,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:59,055 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, 1, 1] [2023-11-24 21:44:59,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:59,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:59,262 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:44:59,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1107044307, now seen corresponding path program 1 times [2023-11-24 21:44:59,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:59,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449039612] [2023-11-24 21:44:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449039612] [2023-11-24 21:44:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449039612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161633639] [2023-11-24 21:44:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:59,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:59,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:59,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:45:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:00,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:45:00,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:00,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:01,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161633639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:01,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:01,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-24 21:45:01,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302123412] [2023-11-24 21:45:01,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:45:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:45:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:45:01,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:45:01,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 246 transitions, 3271 flow. Second operand has 19 states, 19 states have (on average 21.157894736842106) internal successors, (402), 19 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:01,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:01,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:45:01,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:05,285 INFO L124 PetriNetUnfolderBase]: 2497/4597 cut-off events. [2023-11-24 21:45:05,286 INFO L125 PetriNetUnfolderBase]: For 28874/28903 co-relation queries the response was YES. [2023-11-24 21:45:05,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25580 conditions, 4597 events. 2497/4597 cut-off events. For 28874/28903 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30534 event pairs, 205 based on Foata normal form. 32/4627 useless extension candidates. Maximal degree in co-relation 25530. Up to 1578 conditions per place. [2023-11-24 21:45:05,365 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 263 selfloop transitions, 396 changer transitions 4/671 dead transitions. [2023-11-24 21:45:05,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 671 transitions, 9522 flow [2023-11-24 21:45:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 21:45:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-24 21:45:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 777 transitions. [2023-11-24 21:45:05,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.74 [2023-11-24 21:45:05,370 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 777 transitions. [2023-11-24 21:45:05,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 777 transitions. [2023-11-24 21:45:05,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:05,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 777 transitions. [2023-11-24 21:45:05,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 25.9) internal successors, (777), 30 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:05,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 35.0) internal successors, (1085), 31 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:05,378 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 35.0) internal successors, (1085), 31 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:05,378 INFO L175 Difference]: Start difference. First operand has 102 places, 246 transitions, 3271 flow. Second operand 30 states and 777 transitions. [2023-11-24 21:45:05,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 671 transitions, 9522 flow [2023-11-24 21:45:05,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 671 transitions, 9368 flow, removed 65 selfloop flow, removed 6 redundant places. [2023-11-24 21:45:05,622 INFO L231 Difference]: Finished difference. Result has 133 places, 536 transitions, 8664 flow [2023-11-24 21:45:05,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8664, PETRI_PLACES=133, PETRI_TRANSITIONS=536} [2023-11-24 21:45:05,623 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 97 predicate places. [2023-11-24 21:45:05,623 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 536 transitions, 8664 flow [2023-11-24 21:45:05,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.157894736842106) internal successors, (402), 19 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:05,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:05,624 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, 1, 1] [2023-11-24 21:45:05,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:05,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:45:05,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:45:05,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1312610183, now seen corresponding path program 2 times [2023-11-24 21:45:05,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:05,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096521079] [2023-11-24 21:45:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:05,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096521079] [2023-11-24 21:45:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096521079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753955558] [2023-11-24 21:45:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:45:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:06,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:06,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:45:06,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:45:06,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:06,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:45:06,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:06,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:45:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753955558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:07,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:07,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-11-24 21:45:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514592876] [2023-11-24 21:45:07,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:07,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:45:07,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:45:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:45:07,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:45:07,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 536 transitions, 8664 flow. Second operand has 15 states, 15 states have (on average 21.4) internal successors, (321), 15 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:07,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:07,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:45:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:10,209 INFO L124 PetriNetUnfolderBase]: 3438/6431 cut-off events. [2023-11-24 21:45:10,209 INFO L125 PetriNetUnfolderBase]: For 49611/49641 co-relation queries the response was YES. [2023-11-24 21:45:10,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39117 conditions, 6431 events. 3438/6431 cut-off events. For 49611/49641 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 46727 event pairs, 316 based on Foata normal form. 7/6436 useless extension candidates. Maximal degree in co-relation 39061. Up to 4084 conditions per place. [2023-11-24 21:45:10,320 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 614 selfloop transitions, 227 changer transitions 6/855 dead transitions. [2023-11-24 21:45:10,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 855 transitions, 14762 flow [2023-11-24 21:45:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 21:45:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-24 21:45:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 494 transitions. [2023-11-24 21:45:10,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7841269841269841 [2023-11-24 21:45:10,326 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 494 transitions. [2023-11-24 21:45:10,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 494 transitions. [2023-11-24 21:45:10,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:10,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 494 transitions. [2023-11-24 21:45:10,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 27.444444444444443) internal successors, (494), 18 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:10,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:10,334 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:10,334 INFO L175 Difference]: Start difference. First operand has 133 places, 536 transitions, 8664 flow. Second operand 18 states and 494 transitions. [2023-11-24 21:45:10,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 855 transitions, 14762 flow [2023-11-24 21:45:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 855 transitions, 13374 flow, removed 680 selfloop flow, removed 5 redundant places. [2023-11-24 21:45:10,908 INFO L231 Difference]: Finished difference. Result has 155 places, 715 transitions, 11497 flow [2023-11-24 21:45:10,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7730, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11497, PETRI_PLACES=155, PETRI_TRANSITIONS=715} [2023-11-24 21:45:10,910 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 119 predicate places. [2023-11-24 21:45:10,910 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 715 transitions, 11497 flow [2023-11-24 21:45:10,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.4) internal successors, (321), 15 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:10,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:10,911 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, 1, 1] [2023-11-24 21:45:10,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:11,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:45:11,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:45:11,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 854645344, now seen corresponding path program 3 times [2023-11-24 21:45:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:11,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185881206] [2023-11-24 21:45:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185881206] [2023-11-24 21:45:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185881206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959987211] [2023-11-24 21:45:11,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:45:11,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:11,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:11,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:11,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:45:11,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:45:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:11,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:45:11,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:11,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:11,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959987211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:11,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:11,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-24 21:45:11,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352046470] [2023-11-24 21:45:11,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:11,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:45:11,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:45:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:45:11,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:45:11,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 715 transitions, 11497 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) [2023-11-24 21:45:11,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:11,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:45:11,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:14,551 INFO L124 PetriNetUnfolderBase]: 4826/9072 cut-off events. [2023-11-24 21:45:14,552 INFO L125 PetriNetUnfolderBase]: For 84231/84399 co-relation queries the response was YES. [2023-11-24 21:45:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55756 conditions, 9072 events. 4826/9072 cut-off events. For 84231/84399 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72045 event pairs, 56 based on Foata normal form. 179/9239 useless extension candidates. Maximal degree in co-relation 55691. Up to 2700 conditions per place. [2023-11-24 21:45:14,698 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 953 selfloop transitions, 355 changer transitions 6/1322 dead transitions. [2023-11-24 21:45:14,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1322 transitions, 22791 flow [2023-11-24 21:45:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:45:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:45:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 310 transitions. [2023-11-24 21:45:14,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2023-11-24 21:45:14,702 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 310 transitions. [2023-11-24 21:45:14,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 310 transitions. [2023-11-24 21:45:14,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:14,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 310 transitions. [2023-11-24 21:45:14,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:14,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:14,710 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:14,710 INFO L175 Difference]: Start difference. First operand has 155 places, 715 transitions, 11497 flow. Second operand 12 states and 310 transitions. [2023-11-24 21:45:14,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1322 transitions, 22791 flow [2023-11-24 21:45:15,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1322 transitions, 22251 flow, removed 264 selfloop flow, removed 3 redundant places. [2023-11-24 21:45:15,554 INFO L231 Difference]: Finished difference. Result has 172 places, 930 transitions, 16553 flow [2023-11-24 21:45:15,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11151, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16553, PETRI_PLACES=172, PETRI_TRANSITIONS=930} [2023-11-24 21:45:15,556 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 136 predicate places. [2023-11-24 21:45:15,556 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 930 transitions, 16553 flow [2023-11-24 21:45:15,556 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) [2023-11-24 21:45:15,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:15,556 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, 1, 1] [2023-11-24 21:45:15,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:15,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:45:15,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:45:15,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -141523368, now seen corresponding path program 4 times [2023-11-24 21:45:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:15,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353182477] [2023-11-24 21:45:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:15,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:15,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:15,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353182477] [2023-11-24 21:45:15,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353182477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736027251] [2023-11-24 21:45:15,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:45:15,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:15,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:15,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:15,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:45:15,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:45:15,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:15,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:45:15,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:16,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736027251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:16,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-24 21:45:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016004853] [2023-11-24 21:45:16,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:45:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:45:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:45:16,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:45:16,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 930 transitions, 16553 flow. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 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) [2023-11-24 21:45:16,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:16,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:45:16,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:20,485 INFO L124 PetriNetUnfolderBase]: 5387/10755 cut-off events. [2023-11-24 21:45:20,485 INFO L125 PetriNetUnfolderBase]: For 121576/121634 co-relation queries the response was YES. [2023-11-24 21:45:20,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71220 conditions, 10755 events. 5387/10755 cut-off events. For 121576/121634 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 92166 event pairs, 431 based on Foata normal form. 43/10796 useless extension candidates. Maximal degree in co-relation 71145. Up to 3881 conditions per place. [2023-11-24 21:45:20,741 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 683 selfloop transitions, 696 changer transitions 0/1387 dead transitions. [2023-11-24 21:45:20,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1387 transitions, 26534 flow [2023-11-24 21:45:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:45:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:45:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 358 transitions. [2023-11-24 21:45:20,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7306122448979592 [2023-11-24 21:45:20,743 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 358 transitions. [2023-11-24 21:45:20,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 358 transitions. [2023-11-24 21:45:20,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:20,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 358 transitions. [2023-11-24 21:45:20,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:20,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 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) [2023-11-24 21:45:20,746 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 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) [2023-11-24 21:45:20,746 INFO L175 Difference]: Start difference. First operand has 172 places, 930 transitions, 16553 flow. Second operand 14 states and 358 transitions. [2023-11-24 21:45:20,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1387 transitions, 26534 flow [2023-11-24 21:45:22,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1387 transitions, 25879 flow, removed 313 selfloop flow, removed 2 redundant places. [2023-11-24 21:45:22,412 INFO L231 Difference]: Finished difference. Result has 189 places, 1120 transitions, 21895 flow [2023-11-24 21:45:22,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=15936, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21895, PETRI_PLACES=189, PETRI_TRANSITIONS=1120} [2023-11-24 21:45:22,414 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 153 predicate places. [2023-11-24 21:45:22,414 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 1120 transitions, 21895 flow [2023-11-24 21:45:22,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 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) [2023-11-24 21:45:22,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:22,414 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, 1, 1] [2023-11-24 21:45:22,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:45:22,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:45:22,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1479665437, now seen corresponding path program 5 times [2023-11-24 21:45:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185864513] [2023-11-24 21:45:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:23,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185864513] [2023-11-24 21:45:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185864513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:23,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226277118] [2023-11-24 21:45:23,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:45:23,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:23,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:23,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:23,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:45:23,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-24 21:45:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:23,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:45:23,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:23,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:24,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226277118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:24,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:24,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-11-24 21:45:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742147109] [2023-11-24 21:45:24,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:45:24,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:45:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:45:24,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:45:24,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 1120 transitions, 21895 flow. Second operand has 15 states, 15 states have (on average 21.4) internal successors, (321), 15 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:24,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:24,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:45:24,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:31,146 INFO L124 PetriNetUnfolderBase]: 6581/13231 cut-off events. [2023-11-24 21:45:31,146 INFO L125 PetriNetUnfolderBase]: For 181422/181456 co-relation queries the response was YES. [2023-11-24 21:45:31,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93642 conditions, 13231 events. 6581/13231 cut-off events. For 181422/181456 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 117514 event pairs, 546 based on Foata normal form. 28/13257 useless extension candidates. Maximal degree in co-relation 93561. Up to 5838 conditions per place. [2023-11-24 21:45:31,360 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 562 selfloop transitions, 972 changer transitions 15/1557 dead transitions. [2023-11-24 21:45:31,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1557 transitions, 33203 flow [2023-11-24 21:45:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 21:45:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-24 21:45:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 527 transitions. [2023-11-24 21:45:31,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7528571428571429 [2023-11-24 21:45:31,363 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 527 transitions. [2023-11-24 21:45:31,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 527 transitions. [2023-11-24 21:45:31,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:31,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 527 transitions. [2023-11-24 21:45:31,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 26.35) internal successors, (527), 20 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:31,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:31,368 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:31,368 INFO L175 Difference]: Start difference. First operand has 189 places, 1120 transitions, 21895 flow. Second operand 20 states and 527 transitions. [2023-11-24 21:45:31,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1557 transitions, 33203 flow [2023-11-24 21:45:34,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 1557 transitions, 32764 flow, removed 207 selfloop flow, removed 3 redundant places. [2023-11-24 21:45:34,575 INFO L231 Difference]: Finished difference. Result has 218 places, 1441 transitions, 32748 flow [2023-11-24 21:45:34,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21554, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=32748, PETRI_PLACES=218, PETRI_TRANSITIONS=1441} [2023-11-24 21:45:34,576 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 182 predicate places. [2023-11-24 21:45:34,576 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 1441 transitions, 32748 flow [2023-11-24 21:45:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.4) internal successors, (321), 15 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:34,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:34,577 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, 1, 1] [2023-11-24 21:45:34,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:34,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:34,778 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:45:34,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1072878478, now seen corresponding path program 6 times [2023-11-24 21:45:34,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364043402] [2023-11-24 21:45:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:34,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:34,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364043402] [2023-11-24 21:45:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364043402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679984971] [2023-11-24 21:45:34,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:45:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:34,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:34,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ec920a-7863-4f87-b9c5-f00407a1e4ff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:45:34,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:45:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:34,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:45:34,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:35,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:35,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679984971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:35,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:35,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-24 21:45:35,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025745145] [2023-11-24 21:45:35,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:45:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:45:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:45:35,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2023-11-24 21:45:35,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1441 transitions, 32748 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) [2023-11-24 21:45:35,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:35,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2023-11-24 21:45:35,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand