./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/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_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/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_9811702a-2212-43d5-8733-2867eef18cff/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 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:43:23,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:43:24,072 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:43:24,077 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:43:24,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:43:24,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:43:24,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:43:24,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:43:24,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:43:24,110 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:43:24,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:43:24,112 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:43:24,113 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:43:24,113 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:43:24,114 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:43:24,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:43:24,115 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:43:24,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:43:24,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:43:24,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:43:24,118 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:43:24,119 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:43:24,119 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:43:24,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:43:24,120 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:43:24,121 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:43:24,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:43:24,122 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:43:24,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:43:24,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:43:24,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:43:24,124 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:43:24,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:24,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:43:24,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:43:24,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:43:24,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:43:24,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:43:24,127 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:43:24,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:43:24,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:43:24,128 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_9811702a-2212-43d5-8733-2867eef18cff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 [2023-11-24 21:43:24,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:43:24,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:43:24,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:43:24,451 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:43:24,452 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:43:24,453 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-24 21:43:27,599 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:27,870 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:27,870 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-24 21:43:27,891 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/data/6504c3f2a/b3745fbfa8b445509a6f343d091199d1/FLAG11689ed0a [2023-11-24 21:43:27,917 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/data/6504c3f2a/b3745fbfa8b445509a6f343d091199d1 [2023-11-24 21:43:27,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:27,926 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:27,931 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:27,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:27,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:27,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:27" (1/1) ... [2023-11-24 21:43:27,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515d92d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:27, skipping insertion in model container [2023-11-24 21:43:27,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:27" (1/1) ... [2023-11-24 21:43:28,013 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:28,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:28,574 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:28,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:28,710 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:28,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28 WrapperNode [2023-11-24 21:43:28,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:28,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:28,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:28,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:28,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,792 INFO L138 Inliner]: procedures = 166, calls = 39, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 131 [2023-11-24 21:43:28,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:28,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:28,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:28,794 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:28,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,809 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,827 INFO L175 MemorySlicer]: Split 19 memory accesses to 3 slices as follows [2, 1, 16]. 84 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 1, 3]. [2023-11-24 21:43:28,828 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,848 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:28,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:28,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:28,853 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:28,874 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (1/1) ... [2023-11-24 21:43:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:28,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:28,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:43:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:43:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:43:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-11-24 21:43:28,980 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-11-24 21:43:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:43:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:43:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:43:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:43:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:43:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:43:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:43:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:43:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:43:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:28,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:28,983 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 21:43:29,139 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:29,141 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:29,491 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:29,681 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:29,682 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:43:29,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:29 BoogieIcfgContainer [2023-11-24 21:43:29,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:29,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:29,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:29,688 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:29,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:27" (1/3) ... [2023-11-24 21:43:29,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3964daff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:29, skipping insertion in model container [2023-11-24 21:43:29,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:28" (2/3) ... [2023-11-24 21:43:29,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3964daff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:29, skipping insertion in model container [2023-11-24 21:43:29,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:29" (3/3) ... [2023-11-24 21:43:29,691 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-24 21:43:29,709 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:29,709 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-11-24 21:43:29,709 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:43:29,773 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:43:29,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 78 transitions, 160 flow [2023-11-24 21:43:29,848 INFO L124 PetriNetUnfolderBase]: 10/77 cut-off events. [2023-11-24 21:43:29,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:29,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 10/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 223 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-11-24 21:43:29,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 78 transitions, 160 flow [2023-11-24 21:43:29,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 77 transitions, 157 flow [2023-11-24 21:43:29,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:29,877 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;@1782773, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:29,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-11-24 21:43:29,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:43:29,880 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-24 21:43:29,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:29,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:29,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:43:29,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:29,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 13828, now seen corresponding path program 1 times [2023-11-24 21:43:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:29,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356766287] [2023-11-24 21:43:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:30,297 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 21:43:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356766287] [2023-11-24 21:43:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356766287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:30,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:30,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119549251] [2023-11-24 21:43:30,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:30,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:30,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:30,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2023-11-24 21:43:30,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:30,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2023-11-24 21:43:30,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:30,718 INFO L124 PetriNetUnfolderBase]: 211/623 cut-off events. [2023-11-24 21:43:30,718 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:43:30,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 623 events. 211/623 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3823 event pairs, 143 based on Foata normal form. 52/526 useless extension candidates. Maximal degree in co-relation 987. Up to 374 conditions per place. [2023-11-24 21:43:30,732 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 29 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-24 21:43:30,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 201 flow [2023-11-24 21:43:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2023-11-24 21:43:30,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2023-11-24 21:43:30,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2023-11-24 21:43:30,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2023-11-24 21:43:30,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:30,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2023-11-24 21:43:30,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,772 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 157 flow. Second operand 3 states and 152 transitions. [2023-11-24 21:43:30,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 201 flow [2023-11-24 21:43:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:30,785 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 142 flow [2023-11-24 21:43:30,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-11-24 21:43:30,793 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-24 21:43:30,793 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 142 flow [2023-11-24 21:43:30,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:30,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:43:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:30,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:30,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash 13829, now seen corresponding path program 1 times [2023-11-24 21:43:30,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:30,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662938450] [2023-11-24 21:43:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,025 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 21:43:31,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662938450] [2023-11-24 21:43:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662938450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:31,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527488259] [2023-11-24 21:43:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:31,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2023-11-24 21:43:31,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:31,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2023-11-24 21:43:31,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:31,224 INFO L124 PetriNetUnfolderBase]: 211/622 cut-off events. [2023-11-24 21:43:31,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:31,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 622 events. 211/622 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3833 event pairs, 143 based on Foata normal form. 1/474 useless extension candidates. Maximal degree in co-relation 994. Up to 374 conditions per place. [2023-11-24 21:43:31,231 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 29 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-24 21:43:31,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 202 flow [2023-11-24 21:43:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-24 21:43:31,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2023-11-24 21:43:31,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-24 21:43:31,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-24 21:43:31,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:31,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-24 21:43:31,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,239 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 142 flow. Second operand 3 states and 146 transitions. [2023-11-24 21:43:31,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 202 flow [2023-11-24 21:43:31,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:31,242 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 140 flow [2023-11-24 21:43:31,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-11-24 21:43:31,243 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-11-24 21:43:31,243 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 140 flow [2023-11-24 21:43:31,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:31,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:31,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:31,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:31,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash 429088, now seen corresponding path program 1 times [2023-11-24 21:43:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965038197] [2023-11-24 21:43:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,304 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 21:43:31,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965038197] [2023-11-24 21:43:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965038197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:31,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:31,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144350248] [2023-11-24 21:43:31,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:31,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:31,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:31,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:43:31,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:31,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:43:31,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:31,498 INFO L124 PetriNetUnfolderBase]: 212/601 cut-off events. [2023-11-24 21:43:31,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:31,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 601 events. 212/601 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3691 event pairs, 112 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 979. Up to 305 conditions per place. [2023-11-24 21:43:31,506 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 47 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-24 21:43:31,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 270 flow [2023-11-24 21:43:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:43:31,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.688034188034188 [2023-11-24 21:43:31,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:43:31,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:43:31,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:31,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:43:31,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,517 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 140 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:43:31,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 270 flow [2023-11-24 21:43:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:31,521 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 138 flow [2023-11-24 21:43:31,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-11-24 21:43:31,523 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-11-24 21:43:31,524 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 138 flow [2023-11-24 21:43:31,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:31,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:31,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:31,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash 429089, now seen corresponding path program 1 times [2023-11-24 21:43:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529197507] [2023-11-24 21:43:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,646 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 21:43:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529197507] [2023-11-24 21:43:31,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529197507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:31,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:31,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315105293] [2023-11-24 21:43:31,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:31,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:31,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:31,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2023-11-24 21:43:31,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:31,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2023-11-24 21:43:31,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:31,843 INFO L124 PetriNetUnfolderBase]: 212/600 cut-off events. [2023-11-24 21:43:31,843 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:43:31,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 600 events. 212/600 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3682 event pairs, 112 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 989. Up to 304 conditions per place. [2023-11-24 21:43:31,849 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 46 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-24 21:43:31,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 266 flow [2023-11-24 21:43:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-24 21:43:31,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6965811965811965 [2023-11-24 21:43:31,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-24 21:43:31,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-24 21:43:31,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:31,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-24 21:43:31,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,857 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 138 flow. Second operand 3 states and 163 transitions. [2023-11-24 21:43:31,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 266 flow [2023-11-24 21:43:31,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:31,863 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 136 flow [2023-11-24 21:43:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2023-11-24 21:43:31,865 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-11-24 21:43:31,865 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 136 flow [2023-11-24 21:43:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:31,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:31,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:31,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:31,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1148584433, now seen corresponding path program 1 times [2023-11-24 21:43:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:31,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006982130] [2023-11-24 21:43:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:31,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:32,027 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 21:43:32,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006982130] [2023-11-24 21:43:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006982130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:32,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:32,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741404928] [2023-11-24 21:43:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:32,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2023-11-24 21:43:32,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:32,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2023-11-24 21:43:32,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:32,318 INFO L124 PetriNetUnfolderBase]: 212/583 cut-off events. [2023-11-24 21:43:32,319 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:43:32,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 583 events. 212/583 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3511 event pairs, 112 based on Foata normal form. 0/462 useless extension candidates. Maximal degree in co-relation 972. Up to 304 conditions per place. [2023-11-24 21:43:32,329 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 46 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-11-24 21:43:32,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 264 flow [2023-11-24 21:43:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2023-11-24 21:43:32,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2023-11-24 21:43:32,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 201 transitions. [2023-11-24 21:43:32,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 201 transitions. [2023-11-24 21:43:32,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:32,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 201 transitions. [2023-11-24 21:43:32,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,335 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 136 flow. Second operand 4 states and 201 transitions. [2023-11-24 21:43:32,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 264 flow [2023-11-24 21:43:32,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:32,338 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 134 flow [2023-11-24 21:43:32,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-11-24 21:43:32,339 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-11-24 21:43:32,340 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 134 flow [2023-11-24 21:43:32,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:32,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:32,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:32,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:32,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -16988191, now seen corresponding path program 1 times [2023-11-24 21:43:32,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:32,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216014174] [2023-11-24 21:43:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:32,430 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 21:43:32,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216014174] [2023-11-24 21:43:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216014174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:32,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454566735] [2023-11-24 21:43:32,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:32,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2023-11-24 21:43:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2023-11-24 21:43:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:32,775 INFO L124 PetriNetUnfolderBase]: 235/573 cut-off events. [2023-11-24 21:43:32,775 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:43:32,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 573 events. 235/573 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3312 event pairs, 22 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 1013. Up to 283 conditions per place. [2023-11-24 21:43:32,781 INFO L140 encePairwiseOnDemand]: 70/78 looper letters, 61 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-24 21:43:32,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 328 flow [2023-11-24 21:43:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2023-11-24 21:43:32,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2023-11-24 21:43:32,783 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 244 transitions. [2023-11-24 21:43:32,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 244 transitions. [2023-11-24 21:43:32,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:32,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 244 transitions. [2023-11-24 21:43:32,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,787 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 134 flow. Second operand 5 states and 244 transitions. [2023-11-24 21:43:32,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 328 flow [2023-11-24 21:43:32,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 95 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:32,791 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 135 flow [2023-11-24 21:43:32,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-11-24 21:43:32,792 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-11-24 21:43:32,792 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 135 flow [2023-11-24 21:43:32,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:32,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:32,793 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:32,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash -16988190, now seen corresponding path program 1 times [2023-11-24 21:43:32,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:32,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398638805] [2023-11-24 21:43:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:32,987 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 21:43:32,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398638805] [2023-11-24 21:43:32,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398638805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:32,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:32,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086039300] [2023-11-24 21:43:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:32,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2023-11-24 21:43:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:33,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2023-11-24 21:43:33,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:33,340 INFO L124 PetriNetUnfolderBase]: 234/557 cut-off events. [2023-11-24 21:43:33,340 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-24 21:43:33,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 557 events. 234/557 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3074 event pairs, 53 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 1044. Up to 283 conditions per place. [2023-11-24 21:43:33,345 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 45 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-24 21:43:33,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 261 flow [2023-11-24 21:43:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2023-11-24 21:43:33,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5820512820512821 [2023-11-24 21:43:33,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 227 transitions. [2023-11-24 21:43:33,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 227 transitions. [2023-11-24 21:43:33,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:33,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 227 transitions. [2023-11-24 21:43:33,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,351 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 135 flow. Second operand 5 states and 227 transitions. [2023-11-24 21:43:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 261 flow [2023-11-24 21:43:33,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 251 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:33,357 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 127 flow [2023-11-24 21:43:33,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-11-24 21:43:33,358 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-11-24 21:43:33,358 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 127 flow [2023-11-24 21:43:33,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:33,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:33,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:33,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:33,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash 48343569, now seen corresponding path program 1 times [2023-11-24 21:43:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:33,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064125856] [2023-11-24 21:43:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:33,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:33,464 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 21:43:33,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:33,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064125856] [2023-11-24 21:43:33,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064125856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:33,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:33,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575561584] [2023-11-24 21:43:33,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:33,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:33,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:33,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 78 [2023-11-24 21:43:33,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:33,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 78 [2023-11-24 21:43:33,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:33,812 INFO L124 PetriNetUnfolderBase]: 255/620 cut-off events. [2023-11-24 21:43:33,812 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-24 21:43:33,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 620 events. 255/620 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3494 event pairs, 74 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 1153. Up to 308 conditions per place. [2023-11-24 21:43:33,817 INFO L140 encePairwiseOnDemand]: 61/78 looper letters, 73 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2023-11-24 21:43:33,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 398 flow [2023-11-24 21:43:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 284 transitions. [2023-11-24 21:43:33,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2023-11-24 21:43:33,820 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 284 transitions. [2023-11-24 21:43:33,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 284 transitions. [2023-11-24 21:43:33,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:33,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 284 transitions. [2023-11-24 21:43:33,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,824 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,824 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 127 flow. Second operand 6 states and 284 transitions. [2023-11-24 21:43:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 398 flow [2023-11-24 21:43:33,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 105 transitions, 386 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:33,829 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 230 flow [2023-11-24 21:43:33,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2023-11-24 21:43:33,833 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-11-24 21:43:33,833 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 230 flow [2023-11-24 21:43:33,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:33,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:33,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:33,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:33,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash 48343570, now seen corresponding path program 1 times [2023-11-24 21:43:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791622943] [2023-11-24 21:43:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:34,025 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 21:43:34,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:34,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791622943] [2023-11-24 21:43:34,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791622943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:34,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:34,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349169945] [2023-11-24 21:43:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:34,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 78 [2023-11-24 21:43:34,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:34,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 78 [2023-11-24 21:43:34,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:34,349 INFO L124 PetriNetUnfolderBase]: 251/568 cut-off events. [2023-11-24 21:43:34,349 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-24 21:43:34,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1262 conditions, 568 events. 251/568 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2922 event pairs, 84 based on Foata normal form. 74/596 useless extension candidates. Maximal degree in co-relation 1244. Up to 428 conditions per place. [2023-11-24 21:43:34,355 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 46 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-11-24 21:43:34,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 344 flow [2023-11-24 21:43:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2023-11-24 21:43:34,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-11-24 21:43:34,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 205 transitions. [2023-11-24 21:43:34,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 205 transitions. [2023-11-24 21:43:34,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:34,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 205 transitions. [2023-11-24 21:43:34,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,360 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,361 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 230 flow. Second operand 5 states and 205 transitions. [2023-11-24 21:43:34,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 344 flow [2023-11-24 21:43:34,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:34,367 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 230 flow [2023-11-24 21:43:34,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-11-24 21:43:34,369 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -8 predicate places. [2023-11-24 21:43:34,369 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 230 flow [2023-11-24 21:43:34,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:34,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:34,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:43:34,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:34,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1454507843, now seen corresponding path program 1 times [2023-11-24 21:43:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:34,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316137288] [2023-11-24 21:43:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:34,522 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 21:43:34,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:34,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316137288] [2023-11-24 21:43:34,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316137288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:34,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:34,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184692238] [2023-11-24 21:43:34,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:34,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2023-11-24 21:43:34,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:34,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2023-11-24 21:43:34,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:34,962 INFO L124 PetriNetUnfolderBase]: 258/585 cut-off events. [2023-11-24 21:43:34,963 INFO L125 PetriNetUnfolderBase]: For 271/276 co-relation queries the response was YES. [2023-11-24 21:43:34,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 585 events. 258/585 cut-off events. For 271/276 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3074 event pairs, 13 based on Foata normal form. 7/548 useless extension candidates. Maximal degree in co-relation 1331. Up to 304 conditions per place. [2023-11-24 21:43:34,968 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 74 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2023-11-24 21:43:34,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 500 flow [2023-11-24 21:43:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:43:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:43:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 298 transitions. [2023-11-24 21:43:34,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2023-11-24 21:43:34,971 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 298 transitions. [2023-11-24 21:43:34,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 298 transitions. [2023-11-24 21:43:34,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:34,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 298 transitions. [2023-11-24 21:43:34,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.57142857142857) internal successors, (298), 7 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 21:43:34,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,975 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,975 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 230 flow. Second operand 7 states and 298 transitions. [2023-11-24 21:43:34,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 500 flow [2023-11-24 21:43:34,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 486 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:34,980 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 272 flow [2023-11-24 21:43:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-11-24 21:43:34,981 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-11-24 21:43:34,982 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 272 flow [2023-11-24 21:43:34,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:34,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:34,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:43:34,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:34,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1482286627, now seen corresponding path program 2 times [2023-11-24 21:43:34,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:34,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020547887] [2023-11-24 21:43:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,117 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 21:43:35,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020547887] [2023-11-24 21:43:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020547887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:35,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995924357] [2023-11-24 21:43:35,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:35,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:35,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:35,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2023-11-24 21:43:35,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:35,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2023-11-24 21:43:35,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:35,500 INFO L124 PetriNetUnfolderBase]: 252/555 cut-off events. [2023-11-24 21:43:35,501 INFO L125 PetriNetUnfolderBase]: For 467/474 co-relation queries the response was YES. [2023-11-24 21:43:35,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1334 conditions, 555 events. 252/555 cut-off events. For 467/474 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2791 event pairs, 69 based on Foata normal form. 21/532 useless extension candidates. Maximal degree in co-relation 1312. Up to 308 conditions per place. [2023-11-24 21:43:35,506 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 63 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2023-11-24 21:43:35,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 446 flow [2023-11-24 21:43:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 251 transitions. [2023-11-24 21:43:35,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363247863247863 [2023-11-24 21:43:35,509 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 251 transitions. [2023-11-24 21:43:35,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 251 transitions. [2023-11-24 21:43:35,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:35,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 251 transitions. [2023-11-24 21:43:35,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,513 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,513 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 272 flow. Second operand 6 states and 251 transitions. [2023-11-24 21:43:35,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 446 flow [2023-11-24 21:43:35,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 85 transitions, 403 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-24 21:43:35,519 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 209 flow [2023-11-24 21:43:35,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-11-24 21:43:35,519 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-11-24 21:43:35,520 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 209 flow [2023-11-24 21:43:35,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:35,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:35,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:43:35,521 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:35,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -302139274, now seen corresponding path program 1 times [2023-11-24 21:43:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360492210] [2023-11-24 21:43:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:35,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,627 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 21:43:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:35,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360492210] [2023-11-24 21:43:35,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360492210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:35,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:35,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989387922] [2023-11-24 21:43:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:35,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:35,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:35,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2023-11-24 21:43:35,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:35,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2023-11-24 21:43:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:35,999 INFO L124 PetriNetUnfolderBase]: 396/858 cut-off events. [2023-11-24 21:43:35,999 INFO L125 PetriNetUnfolderBase]: For 472/474 co-relation queries the response was YES. [2023-11-24 21:43:36,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 858 events. 396/858 cut-off events. For 472/474 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4449 event pairs, 99 based on Foata normal form. 0/755 useless extension candidates. Maximal degree in co-relation 1982. Up to 461 conditions per place. [2023-11-24 21:43:36,007 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 85 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2023-11-24 21:43:36,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 118 transitions, 609 flow [2023-11-24 21:43:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2023-11-24 21:43:36,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581196581196581 [2023-11-24 21:43:36,010 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 308 transitions. [2023-11-24 21:43:36,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 308 transitions. [2023-11-24 21:43:36,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:36,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 308 transitions. [2023-11-24 21:43:36,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,014 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 209 flow. Second operand 6 states and 308 transitions. [2023-11-24 21:43:36,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 118 transitions, 609 flow [2023-11-24 21:43:36,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 594 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:43:36,018 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 365 flow [2023-11-24 21:43:36,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-11-24 21:43:36,020 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-11-24 21:43:36,020 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 365 flow [2023-11-24 21:43:36,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:36,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:36,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:43:36,021 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:36,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -301124362, now seen corresponding path program 1 times [2023-11-24 21:43:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:36,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359183008] [2023-11-24 21:43:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:36,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:36,162 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 21:43:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359183008] [2023-11-24 21:43:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359183008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:36,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:36,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925717221] [2023-11-24 21:43:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:36,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:36,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:36,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:43:36,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:36,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:43:36,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:36,648 INFO L124 PetriNetUnfolderBase]: 604/1306 cut-off events. [2023-11-24 21:43:36,649 INFO L125 PetriNetUnfolderBase]: For 1137/1142 co-relation queries the response was YES. [2023-11-24 21:43:36,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 1306 events. 604/1306 cut-off events. For 1137/1142 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7538 event pairs, 124 based on Foata normal form. 26/1231 useless extension candidates. Maximal degree in co-relation 3652. Up to 668 conditions per place. [2023-11-24 21:43:36,662 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 103 selfloop transitions, 28 changer transitions 0/147 dead transitions. [2023-11-24 21:43:36,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 147 transitions, 936 flow [2023-11-24 21:43:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:43:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:43:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 355 transitions. [2023-11-24 21:43:36,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501831501831502 [2023-11-24 21:43:36,665 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 355 transitions. [2023-11-24 21:43:36,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 355 transitions. [2023-11-24 21:43:36,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:36,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 355 transitions. [2023-11-24 21:43:36,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.714285714285715) internal successors, (355), 7 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,669 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,669 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 365 flow. Second operand 7 states and 355 transitions. [2023-11-24 21:43:36,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 147 transitions, 936 flow [2023-11-24 21:43:36,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 147 transitions, 936 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:43:36,680 INFO L231 Difference]: Finished difference. Result has 75 places, 94 transitions, 648 flow [2023-11-24 21:43:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=75, PETRI_TRANSITIONS=94} [2023-11-24 21:43:36,681 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-11-24 21:43:36,681 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 94 transitions, 648 flow [2023-11-24 21:43:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:36,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:43:36,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:36,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash -172470577, now seen corresponding path program 1 times [2023-11-24 21:43:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:36,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871143032] [2023-11-24 21:43:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:37,443 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 21:43:37,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871143032] [2023-11-24 21:43:37,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871143032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:37,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:37,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:43:37,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559804485] [2023-11-24 21:43:37,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:37,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:43:37,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:37,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:43:37,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:43:38,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2023-11-24 21:43:38,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 94 transitions, 648 flow. Second operand has 12 states, 12 states have (on average 35.333333333333336) internal successors, (424), 12 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:38,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:38,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2023-11-24 21:43:38,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:39,369 INFO L124 PetriNetUnfolderBase]: 828/1670 cut-off events. [2023-11-24 21:43:39,370 INFO L125 PetriNetUnfolderBase]: For 2663/2665 co-relation queries the response was YES. [2023-11-24 21:43:39,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5427 conditions, 1670 events. 828/1670 cut-off events. For 2663/2665 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9272 event pairs, 157 based on Foata normal form. 1/1549 useless extension candidates. Maximal degree in co-relation 5398. Up to 814 conditions per place. [2023-11-24 21:43:39,388 INFO L140 encePairwiseOnDemand]: 58/78 looper letters, 156 selfloop transitions, 88 changer transitions 0/254 dead transitions. [2023-11-24 21:43:39,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 254 transitions, 1967 flow [2023-11-24 21:43:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:43:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-24 21:43:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 911 transitions. [2023-11-24 21:43:39,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561660561660562 [2023-11-24 21:43:39,394 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 911 transitions. [2023-11-24 21:43:39,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 911 transitions. [2023-11-24 21:43:39,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:39,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 911 transitions. [2023-11-24 21:43:39,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 43.38095238095238) internal successors, (911), 21 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:39,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:39,404 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:39,404 INFO L175 Difference]: Start difference. First operand has 75 places, 94 transitions, 648 flow. Second operand 21 states and 911 transitions. [2023-11-24 21:43:39,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 254 transitions, 1967 flow [2023-11-24 21:43:39,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 254 transitions, 1961 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:39,431 INFO L231 Difference]: Finished difference. Result has 103 places, 157 transitions, 1328 flow [2023-11-24 21:43:39,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1328, PETRI_PLACES=103, PETRI_TRANSITIONS=157} [2023-11-24 21:43:39,432 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-11-24 21:43:39,432 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 157 transitions, 1328 flow [2023-11-24 21:43:39,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 35.333333333333336) internal successors, (424), 12 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:39,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:39,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:39,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:43:39,434 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:39,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 453687815, now seen corresponding path program 2 times [2023-11-24 21:43:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323547774] [2023-11-24 21:43:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:40,076 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 21:43:40,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:40,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323547774] [2023-11-24 21:43:40,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323547774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:40,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:40,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:40,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250470949] [2023-11-24 21:43:40,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:40,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:40,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:40,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2023-11-24 21:43:40,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 157 transitions, 1328 flow. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:40,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:40,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2023-11-24 21:43:40,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:41,856 INFO L124 PetriNetUnfolderBase]: 1045/2225 cut-off events. [2023-11-24 21:43:41,856 INFO L125 PetriNetUnfolderBase]: For 6455/6459 co-relation queries the response was YES. [2023-11-24 21:43:41,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8758 conditions, 2225 events. 1045/2225 cut-off events. For 6455/6459 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 13330 event pairs, 177 based on Foata normal form. 147/2184 useless extension candidates. Maximal degree in co-relation 8718. Up to 836 conditions per place. [2023-11-24 21:43:41,883 INFO L140 encePairwiseOnDemand]: 59/78 looper letters, 197 selfloop transitions, 114 changer transitions 0/321 dead transitions. [2023-11-24 21:43:41,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 321 transitions, 2995 flow [2023-11-24 21:43:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:43:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:43:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 883 transitions. [2023-11-24 21:43:41,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958164642375169 [2023-11-24 21:43:41,888 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 883 transitions. [2023-11-24 21:43:41,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 883 transitions. [2023-11-24 21:43:41,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:41,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 883 transitions. [2023-11-24 21:43:41,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:41,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:41,896 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:41,897 INFO L175 Difference]: Start difference. First operand has 103 places, 157 transitions, 1328 flow. Second operand 19 states and 883 transitions. [2023-11-24 21:43:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 321 transitions, 2995 flow [2023-11-24 21:43:41,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 321 transitions, 2854 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:41,978 INFO L231 Difference]: Finished difference. Result has 125 places, 196 transitions, 1973 flow [2023-11-24 21:43:41,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1973, PETRI_PLACES=125, PETRI_TRANSITIONS=196} [2023-11-24 21:43:41,979 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 54 predicate places. [2023-11-24 21:43:41,979 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 196 transitions, 1973 flow [2023-11-24 21:43:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:41,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:41,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:41,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:43:41,981 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:41,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash -765678935, now seen corresponding path program 3 times [2023-11-24 21:43:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:41,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892513683] [2023-11-24 21:43:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:42,326 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 21:43:42,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:42,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892513683] [2023-11-24 21:43:42,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892513683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:42,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:42,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:42,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848536581] [2023-11-24 21:43:42,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:42,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:42,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:42,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:43:42,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 196 transitions, 1973 flow. Second operand has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:42,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:42,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:43:42,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:44,262 INFO L124 PetriNetUnfolderBase]: 1495/3241 cut-off events. [2023-11-24 21:43:44,262 INFO L125 PetriNetUnfolderBase]: For 14572/14620 co-relation queries the response was YES. [2023-11-24 21:43:44,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14388 conditions, 3241 events. 1495/3241 cut-off events. For 14572/14620 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 22588 event pairs, 274 based on Foata normal form. 26/2997 useless extension candidates. Maximal degree in co-relation 14339. Up to 1108 conditions per place. [2023-11-24 21:43:44,315 INFO L140 encePairwiseOnDemand]: 63/78 looper letters, 292 selfloop transitions, 118 changer transitions 0/437 dead transitions. [2023-11-24 21:43:44,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 437 transitions, 4909 flow [2023-11-24 21:43:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:43:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:43:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 726 transitions. [2023-11-24 21:43:44,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648351648351648 [2023-11-24 21:43:44,321 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 726 transitions. [2023-11-24 21:43:44,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 726 transitions. [2023-11-24 21:43:44,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:44,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 726 transitions. [2023-11-24 21:43:44,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 51.857142857142854) internal successors, (726), 14 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:44,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:44,328 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:44,329 INFO L175 Difference]: Start difference. First operand has 125 places, 196 transitions, 1973 flow. Second operand 14 states and 726 transitions. [2023-11-24 21:43:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 437 transitions, 4909 flow [2023-11-24 21:43:44,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 437 transitions, 4825 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-24 21:43:44,500 INFO L231 Difference]: Finished difference. Result has 141 places, 269 transitions, 3174 flow [2023-11-24 21:43:44,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3174, PETRI_PLACES=141, PETRI_TRANSITIONS=269} [2023-11-24 21:43:44,501 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 70 predicate places. [2023-11-24 21:43:44,502 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 269 transitions, 3174 flow [2023-11-24 21:43:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:44,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:44,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:44,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:43:44,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:44,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash 385786263, now seen corresponding path program 4 times [2023-11-24 21:43:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488074653] [2023-11-24 21:43:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:44,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:45,121 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 21:43:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488074653] [2023-11-24 21:43:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488074653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:45,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:45,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:45,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47928946] [2023-11-24 21:43:45,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:45,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:45,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2023-11-24 21:43:45,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 269 transitions, 3174 flow. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:45,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2023-11-24 21:43:45,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:47,577 INFO L124 PetriNetUnfolderBase]: 1855/4018 cut-off events. [2023-11-24 21:43:47,577 INFO L125 PetriNetUnfolderBase]: For 27464/27471 co-relation queries the response was YES. [2023-11-24 21:43:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19742 conditions, 4018 events. 1855/4018 cut-off events. For 27464/27471 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 26849 event pairs, 420 based on Foata normal form. 153/3848 useless extension candidates. Maximal degree in co-relation 19683. Up to 1866 conditions per place. [2023-11-24 21:43:47,624 INFO L140 encePairwiseOnDemand]: 59/78 looper letters, 259 selfloop transitions, 196 changer transitions 0/465 dead transitions. [2023-11-24 21:43:47,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 465 transitions, 5765 flow [2023-11-24 21:43:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:43:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:43:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 899 transitions. [2023-11-24 21:43:47,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.606612685560054 [2023-11-24 21:43:47,628 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 899 transitions. [2023-11-24 21:43:47,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 899 transitions. [2023-11-24 21:43:47,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:47,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 899 transitions. [2023-11-24 21:43:47,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 47.31578947368421) internal successors, (899), 19 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:47,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:47,635 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:47,635 INFO L175 Difference]: Start difference. First operand has 141 places, 269 transitions, 3174 flow. Second operand 19 states and 899 transitions. [2023-11-24 21:43:47,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 465 transitions, 5765 flow [2023-11-24 21:43:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 465 transitions, 5680 flow, removed 31 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:47,820 INFO L231 Difference]: Finished difference. Result has 165 places, 321 transitions, 4357 flow [2023-11-24 21:43:47,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4357, PETRI_PLACES=165, PETRI_TRANSITIONS=321} [2023-11-24 21:43:47,821 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 94 predicate places. [2023-11-24 21:43:47,822 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 321 transitions, 4357 flow [2023-11-24 21:43:47,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:47,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:47,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:47,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:43:47,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:47,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1158677447, now seen corresponding path program 5 times [2023-11-24 21:43:47,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:47,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176640913] [2023-11-24 21:43:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:48,152 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 21:43:48,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:48,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176640913] [2023-11-24 21:43:48,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176640913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:48,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:48,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:48,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367216192] [2023-11-24 21:43:48,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:48,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:48,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:48,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:48,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:43:48,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 321 transitions, 4357 flow. Second operand has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:48,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:43:48,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:50,675 INFO L124 PetriNetUnfolderBase]: 1908/4286 cut-off events. [2023-11-24 21:43:50,676 INFO L125 PetriNetUnfolderBase]: For 37820/37872 co-relation queries the response was YES. [2023-11-24 21:43:50,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23405 conditions, 4286 events. 1908/4286 cut-off events. For 37820/37872 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 30752 event pairs, 246 based on Foata normal form. 26/4000 useless extension candidates. Maximal degree in co-relation 23337. Up to 1969 conditions per place. [2023-11-24 21:43:50,741 INFO L140 encePairwiseOnDemand]: 63/78 looper letters, 399 selfloop transitions, 134 changer transitions 0/567 dead transitions. [2023-11-24 21:43:50,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 567 transitions, 8123 flow [2023-11-24 21:43:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:43:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:43:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 828 transitions. [2023-11-24 21:43:50,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634615384615384 [2023-11-24 21:43:50,744 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 828 transitions. [2023-11-24 21:43:50,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 828 transitions. [2023-11-24 21:43:50,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:50,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 828 transitions. [2023-11-24 21:43:50,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 51.75) internal successors, (828), 16 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,751 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,751 INFO L175 Difference]: Start difference. First operand has 165 places, 321 transitions, 4357 flow. Second operand 16 states and 828 transitions. [2023-11-24 21:43:50,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 567 transitions, 8123 flow [2023-11-24 21:43:51,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 567 transitions, 7919 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-11-24 21:43:51,040 INFO L231 Difference]: Finished difference. Result has 184 places, 350 transitions, 5288 flow [2023-11-24 21:43:51,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5288, PETRI_PLACES=184, PETRI_TRANSITIONS=350} [2023-11-24 21:43:51,041 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 113 predicate places. [2023-11-24 21:43:51,042 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 350 transitions, 5288 flow [2023-11-24 21:43:51,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:51,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:51,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:51,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:43:51,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:51,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:51,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1155971479, now seen corresponding path program 6 times [2023-11-24 21:43:51,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:51,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664431457] [2023-11-24 21:43:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:51,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:51,447 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 21:43:51,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:51,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664431457] [2023-11-24 21:43:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664431457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:51,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:51,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:51,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172674416] [2023-11-24 21:43:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:51,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:51,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:43:51,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 350 transitions, 5288 flow. Second operand has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:51,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:51,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:43:51,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:54,465 INFO L124 PetriNetUnfolderBase]: 2606/5857 cut-off events. [2023-11-24 21:43:54,466 INFO L125 PetriNetUnfolderBase]: For 63613/63709 co-relation queries the response was YES. [2023-11-24 21:43:54,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33719 conditions, 5857 events. 2606/5857 cut-off events. For 63613/63709 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 45009 event pairs, 644 based on Foata normal form. 39/5460 useless extension candidates. Maximal degree in co-relation 33640. Up to 1481 conditions per place. [2023-11-24 21:43:54,555 INFO L140 encePairwiseOnDemand]: 64/78 looper letters, 456 selfloop transitions, 205 changer transitions 0/695 dead transitions. [2023-11-24 21:43:54,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 695 transitions, 10510 flow [2023-11-24 21:43:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:43:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-24 21:43:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 875 transitions. [2023-11-24 21:43:54,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598793363499246 [2023-11-24 21:43:54,560 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 875 transitions. [2023-11-24 21:43:54,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 875 transitions. [2023-11-24 21:43:54,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:54,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 875 transitions. [2023-11-24 21:43:54,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 51.470588235294116) internal successors, (875), 17 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,567 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,568 INFO L175 Difference]: Start difference. First operand has 184 places, 350 transitions, 5288 flow. Second operand 17 states and 875 transitions. [2023-11-24 21:43:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 695 transitions, 10510 flow [2023-11-24 21:43:54,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 695 transitions, 10256 flow, removed 123 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:54,988 INFO L231 Difference]: Finished difference. Result has 205 places, 435 transitions, 6892 flow [2023-11-24 21:43:54,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6892, PETRI_PLACES=205, PETRI_TRANSITIONS=435} [2023-11-24 21:43:54,990 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 134 predicate places. [2023-11-24 21:43:54,990 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 435 transitions, 6892 flow [2023-11-24 21:43:54,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:54,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:54,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:43:54,991 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1872145407, now seen corresponding path program 1 times [2023-11-24 21:43:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514789022] [2023-11-24 21:43:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:55,150 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 21:43:55,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:55,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514789022] [2023-11-24 21:43:55,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514789022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:55,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:55,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:55,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651647650] [2023-11-24 21:43:55,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:55,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:55,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:55,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2023-11-24 21:43:55,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 435 transitions, 6892 flow. Second operand has 6 states, 6 states have (on average 40.5) internal successors, (243), 6 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:55,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2023-11-24 21:43:55,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:56,401 INFO L124 PetriNetUnfolderBase]: 1465/3246 cut-off events. [2023-11-24 21:43:56,401 INFO L125 PetriNetUnfolderBase]: For 40850/40890 co-relation queries the response was YES. [2023-11-24 21:43:56,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19218 conditions, 3246 events. 1465/3246 cut-off events. For 40850/40890 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 20998 event pairs, 651 based on Foata normal form. 22/3009 useless extension candidates. Maximal degree in co-relation 19146. Up to 2517 conditions per place. [2023-11-24 21:43:56,437 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 226 selfloop transitions, 18 changer transitions 31/296 dead transitions. [2023-11-24 21:43:56,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 296 transitions, 4614 flow [2023-11-24 21:43:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:43:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:43:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 340 transitions. [2023-11-24 21:43:56,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2023-11-24 21:43:56,439 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 340 transitions. [2023-11-24 21:43:56,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 340 transitions. [2023-11-24 21:43:56,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:56,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 340 transitions. [2023-11-24 21:43:56,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,442 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,442 INFO L175 Difference]: Start difference. First operand has 205 places, 435 transitions, 6892 flow. Second operand 7 states and 340 transitions. [2023-11-24 21:43:56,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 296 transitions, 4614 flow [2023-11-24 21:43:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 296 transitions, 3775 flow, removed 316 selfloop flow, removed 31 redundant places. [2023-11-24 21:43:56,778 INFO L231 Difference]: Finished difference. Result has 173 places, 246 transitions, 2778 flow [2023-11-24 21:43:56,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2778, PETRI_PLACES=173, PETRI_TRANSITIONS=246} [2023-11-24 21:43:56,779 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 102 predicate places. [2023-11-24 21:43:56,779 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 246 transitions, 2778 flow [2023-11-24 21:43:56,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.5) internal successors, (243), 6 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:56,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:43:56,780 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:56,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash -164590405, now seen corresponding path program 7 times [2023-11-24 21:43:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:56,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700980462] [2023-11-24 21:43:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:57,375 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 21:43:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700980462] [2023-11-24 21:43:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700980462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:57,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999589921] [2023-11-24 21:43:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:57,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:57,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2023-11-24 21:43:57,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 246 transitions, 2778 flow. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:57,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2023-11-24 21:43:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:59,082 INFO L124 PetriNetUnfolderBase]: 1723/3584 cut-off events. [2023-11-24 21:43:59,082 INFO L125 PetriNetUnfolderBase]: For 25497/25497 co-relation queries the response was YES. [2023-11-24 21:43:59,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18255 conditions, 3584 events. 1723/3584 cut-off events. For 25497/25497 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21962 event pairs, 779 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 18198. Up to 2827 conditions per place. [2023-11-24 21:43:59,120 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 230 selfloop transitions, 31 changer transitions 26/297 dead transitions. [2023-11-24 21:43:59,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 297 transitions, 3856 flow [2023-11-24 21:43:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:43:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:43:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 512 transitions. [2023-11-24 21:43:59,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2023-11-24 21:43:59,123 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 512 transitions. [2023-11-24 21:43:59,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 512 transitions. [2023-11-24 21:43:59,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:59,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 512 transitions. [2023-11-24 21:43:59,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 42.666666666666664) internal successors, (512), 12 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:59,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 78.0) internal successors, (1014), 13 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:59,128 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 78.0) internal successors, (1014), 13 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:59,128 INFO L175 Difference]: Start difference. First operand has 173 places, 246 transitions, 2778 flow. Second operand 12 states and 512 transitions. [2023-11-24 21:43:59,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 297 transitions, 3856 flow [2023-11-24 21:43:59,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 297 transitions, 3639 flow, removed 82 selfloop flow, removed 11 redundant places. [2023-11-24 21:43:59,247 INFO L231 Difference]: Finished difference. Result has 174 places, 245 transitions, 2741 flow [2023-11-24 21:43:59,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2741, PETRI_PLACES=174, PETRI_TRANSITIONS=245} [2023-11-24 21:43:59,248 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 103 predicate places. [2023-11-24 21:43:59,248 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 245 transitions, 2741 flow [2023-11-24 21:43:59,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:59,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:59,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:59,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:43:59,250 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:43:59,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1838497733, now seen corresponding path program 8 times [2023-11-24 21:43:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:59,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818852449] [2023-11-24 21:43:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:59,805 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 21:43:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818852449] [2023-11-24 21:43:59,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818852449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:59,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:59,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:43:59,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049236259] [2023-11-24 21:43:59,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:59,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:44:00,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2023-11-24 21:44:00,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 245 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 21:44:00,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:00,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2023-11-24 21:44:00,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:01,707 INFO L124 PetriNetUnfolderBase]: 1656/3465 cut-off events. [2023-11-24 21:44:01,707 INFO L125 PetriNetUnfolderBase]: For 21755/21756 co-relation queries the response was YES. [2023-11-24 21:44:01,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17251 conditions, 3465 events. 1656/3465 cut-off events. For 21755/21756 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 21234 event pairs, 801 based on Foata normal form. 16/3241 useless extension candidates. Maximal degree in co-relation 17194. Up to 2791 conditions per place. [2023-11-24 21:44:01,747 INFO L140 encePairwiseOnDemand]: 64/78 looper letters, 215 selfloop transitions, 20 changer transitions 27/272 dead transitions. [2023-11-24 21:44:01,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 272 transitions, 3454 flow [2023-11-24 21:44:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:44:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:44:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 469 transitions. [2023-11-24 21:44:01,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466200466200466 [2023-11-24 21:44:01,751 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 469 transitions. [2023-11-24 21:44:01,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 469 transitions. [2023-11-24 21:44:01,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:01,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 469 transitions. [2023-11-24 21:44:01,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 42.63636363636363) internal successors, (469), 11 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 21:44:01,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 78.0) internal successors, (936), 12 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:44:01,761 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 78.0) internal successors, (936), 12 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:44:01,761 INFO L175 Difference]: Start difference. First operand has 174 places, 245 transitions, 2741 flow. Second operand 11 states and 469 transitions. [2023-11-24 21:44:01,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 272 transitions, 3454 flow [2023-11-24 21:44:01,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 272 transitions, 3389 flow, removed 9 selfloop flow, removed 11 redundant places. [2023-11-24 21:44:01,881 INFO L231 Difference]: Finished difference. Result has 168 places, 224 transitions, 2462 flow [2023-11-24 21:44:01,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2462, PETRI_PLACES=168, PETRI_TRANSITIONS=224} [2023-11-24 21:44:01,882 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 97 predicate places. [2023-11-24 21:44:01,882 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 224 transitions, 2462 flow [2023-11-24 21:44:01,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 21:44:01,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:01,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:01,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:44:01,883 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:44:01,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1174139769, now seen corresponding path program 9 times [2023-11-24 21:44:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:01,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913682812] [2023-11-24 21:44:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:01,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:02,220 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 21:44:02,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:02,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913682812] [2023-11-24 21:44:02,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913682812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:02,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:02,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:44:02,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302033864] [2023-11-24 21:44:02,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:02,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:44:02,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:02,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:44:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:44:02,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:44:02,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 224 transitions, 2462 flow. Second operand has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:02,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:02,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:44:02,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:03,862 INFO L124 PetriNetUnfolderBase]: 1591/3412 cut-off events. [2023-11-24 21:44:03,862 INFO L125 PetriNetUnfolderBase]: For 21905/21941 co-relation queries the response was YES. [2023-11-24 21:44:03,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16615 conditions, 3412 events. 1591/3412 cut-off events. For 21905/21941 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 22366 event pairs, 719 based on Foata normal form. 18/3145 useless extension candidates. Maximal degree in co-relation 16562. Up to 2655 conditions per place. [2023-11-24 21:44:03,898 INFO L140 encePairwiseOnDemand]: 64/78 looper letters, 245 selfloop transitions, 38 changer transitions 4/302 dead transitions. [2023-11-24 21:44:03,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 302 transitions, 3760 flow [2023-11-24 21:44:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:44:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:44:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 600 transitions. [2023-11-24 21:44:03,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.591715976331361 [2023-11-24 21:44:03,901 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 600 transitions. [2023-11-24 21:44:03,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 600 transitions. [2023-11-24 21:44:03,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:03,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 600 transitions. [2023-11-24 21:44:03,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 0 states have call successors, (0), 0 states 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 21:44:03,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 21:44:03,906 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 21:44:03,906 INFO L175 Difference]: Start difference. First operand has 168 places, 224 transitions, 2462 flow. Second operand 13 states and 600 transitions. [2023-11-24 21:44:03,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 302 transitions, 3760 flow [2023-11-24 21:44:03,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 302 transitions, 3605 flow, removed 26 selfloop flow, removed 17 redundant places. [2023-11-24 21:44:04,004 INFO L231 Difference]: Finished difference. Result has 159 places, 244 transitions, 2783 flow [2023-11-24 21:44:04,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2783, PETRI_PLACES=159, PETRI_TRANSITIONS=244} [2023-11-24 21:44:04,005 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 88 predicate places. [2023-11-24 21:44:04,006 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 244 transitions, 2783 flow [2023-11-24 21:44:04,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.45454545454545) internal successors, (423), 11 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:04,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:04,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 21:44:04,007 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-11-24 21:44:04,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1230686964, now seen corresponding path program 1 times [2023-11-24 21:44:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646609056] [2023-11-24 21:44:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646609056] [2023-11-24 21:44:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646609056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389913323] [2023-11-24 21:44:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:04,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:04,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:04,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9811702a-2212-43d5-8733-2867eef18cff/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:44:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:04,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-24 21:44:04,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:04,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:44:05,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:44:05,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:44:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:05,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:05,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-24 21:44:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:05,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389913323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:05,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-11-24 21:44:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385317637] [2023-11-24 21:44:05,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:05,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-24 21:44:05,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:05,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-24 21:44:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-11-24 21:44:07,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2023-11-24 21:44:07,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 244 transitions, 2783 flow. Second operand has 28 states, 28 states have (on average 37.5) internal successors, (1050), 28 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 21:44:07,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:07,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2023-11-24 21:44:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand