./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.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_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/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_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/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_5ced5a34-3bea-4e66-b9af-2eda68fdc629/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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:44:09,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:44:09,947 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:44:09,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:44:09,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:44:09,982 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:44:09,983 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:44:09,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:44:09,984 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:44:09,985 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:44:09,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:44:09,986 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:44:09,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:44:09,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:44:09,988 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:44:09,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:44:09,989 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:44:09,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:44:09,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:44:09,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:44:09,992 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:44:09,995 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:44:09,996 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:44:09,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:44:09,997 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:44:09,997 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:44:09,998 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:44:09,998 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:44:09,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:44:09,999 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:44:09,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:44:10,000 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:44:10,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:10,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:44:10,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:44:10,001 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:44:10,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:44:10,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:44:10,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:44:10,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:44:10,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:44:10,005 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_5ced5a34-3bea-4e66-b9af-2eda68fdc629/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc [2023-11-24 21:44:10,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:44:10,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:44:10,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:44:10,308 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:44:10,308 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:44:10,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2023-11-24 21:44:13,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:44:13,882 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:44:13,883 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2023-11-24 21:44:13,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/data/67da7147b/d526ed47c1624807a19ea0c87e947dc0/FLAG8ff470c20 [2023-11-24 21:44:13,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/data/67da7147b/d526ed47c1624807a19ea0c87e947dc0 [2023-11-24 21:44:13,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:44:13,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:44:13,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:13,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:44:13,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:44:13,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:13" (1/1) ... [2023-11-24 21:44:13,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a9a49f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:13, skipping insertion in model container [2023-11-24 21:44:13,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:13" (1/1) ... [2023-11-24 21:44:14,017 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:14,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:14,634 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:44:14,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:14,817 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:44:14,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14 WrapperNode [2023-11-24 21:44:14,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:14,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:14,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:44:14,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:44:14,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,860 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,910 INFO L138 Inliner]: procedures = 271, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 99 [2023-11-24 21:44:14,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:14,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:44:14,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:44:14,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:44:14,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,965 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2023-11-24 21:44:14,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:14,990 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:15,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:15,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:15,009 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:44:15,010 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:44:15,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:44:15,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:44:15,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (1/1) ... [2023-11-24 21:44:15,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:15,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:15,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:44:15,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:44:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:44:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:44:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:44:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:44:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:44:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:44:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:44:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:44:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:44:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:44:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:44:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:44:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:44:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:44:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:44:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:44:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:44:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:44:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:44:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:44:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:44:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:44:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:44:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:44:15,124 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:44:15,316 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:44:15,318 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:44:15,582 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:44:15,827 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:44:15,827 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-24 21:44:15,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:15 BoogieIcfgContainer [2023-11-24 21:44:15,836 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:44:15,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:44:15,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:44:15,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:44:15,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:44:13" (1/3) ... [2023-11-24 21:44:15,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef318c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:15, skipping insertion in model container [2023-11-24 21:44:15,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:14" (2/3) ... [2023-11-24 21:44:15,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef318c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:15, skipping insertion in model container [2023-11-24 21:44:15,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:15" (3/3) ... [2023-11-24 21:44:15,850 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-11-24 21:44:15,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:44:15,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-24 21:44:15,869 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:44:15,920 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-24 21:44:15,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 69 transitions, 145 flow [2023-11-24 21:44:16,018 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2023-11-24 21:44:16,019 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:44:16,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 21/109 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 421 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2023-11-24 21:44:16,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 69 transitions, 145 flow [2023-11-24 21:44:16,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 69 transitions, 145 flow [2023-11-24 21:44:16,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:16,047 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;@de6d88d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:16,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:44:16,052 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:16,052 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:44:16,052 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:16,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:16,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:16,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash 374014, now seen corresponding path program 1 times [2023-11-24 21:44:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318280195] [2023-11-24 21:44:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:16,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:16,443 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 21:44:16,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318280195] [2023-11-24 21:44:16,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318280195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:16,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:16,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111755763] [2023-11-24 21:44:16,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:16,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:16,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 69 [2023-11-24 21:44:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:16,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 69 [2023-11-24 21:44:16,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:16,734 INFO L124 PetriNetUnfolderBase]: 139/450 cut-off events. [2023-11-24 21:44:16,734 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:44:16,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 450 events. 139/450 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2571 event pairs, 108 based on Foata normal form. 91/504 useless extension candidates. Maximal degree in co-relation 685. Up to 252 conditions per place. [2023-11-24 21:44:16,741 INFO L140 encePairwiseOnDemand]: 55/69 looper letters, 33 selfloop transitions, 2 changer transitions 1/65 dead transitions. [2023-11-24 21:44:16,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 209 flow [2023-11-24 21:44:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-24 21:44:16,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2023-11-24 21:44:16,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-24 21:44:16,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-24 21:44:16,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:16,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-24 21:44:16,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:16,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:16,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:16,771 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 145 flow. Second operand 3 states and 141 transitions. [2023-11-24 21:44:16,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 209 flow [2023-11-24 21:44:16,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:44:16,778 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 121 flow [2023-11-24 21:44:16,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-24 21:44:16,785 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-11-24 21:44:16,785 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 121 flow [2023-11-24 21:44:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:16,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:16,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:16,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:44:16,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:16,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash 374015, now seen corresponding path program 1 times [2023-11-24 21:44:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:16,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096818694] [2023-11-24 21:44:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:16,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:17,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:17,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096818694] [2023-11-24 21:44:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096818694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:17,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:17,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718764680] [2023-11-24 21:44:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:17,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:17,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2023-11-24 21:44:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2023-11-24 21:44:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:17,212 INFO L124 PetriNetUnfolderBase]: 132/427 cut-off events. [2023-11-24 21:44:17,213 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 21:44:17,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 427 events. 132/427 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2350 event pairs, 88 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 680. Up to 247 conditions per place. [2023-11-24 21:44:17,218 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 33 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-24 21:44:17,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 211 flow [2023-11-24 21:44:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-24 21:44:17,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2023-11-24 21:44:17,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-24 21:44:17,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-24 21:44:17,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:17,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-24 21:44:17,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,225 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 121 flow. Second operand 3 states and 133 transitions. [2023-11-24 21:44:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 211 flow [2023-11-24 21:44:17,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:17,230 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 127 flow [2023-11-24 21:44:17,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-24 21:44:17,231 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-11-24 21:44:17,231 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 127 flow [2023-11-24 21:44:17,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:17,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 21:44:17,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:44:17,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:17,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1824192231, now seen corresponding path program 1 times [2023-11-24 21:44:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418320607] [2023-11-24 21:44:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:17,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:17,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418320607] [2023-11-24 21:44:17,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418320607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:17,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53325679] [2023-11-24 21:44:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:17,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:17,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:17,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:17,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:44:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:17,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:44:17,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:17,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-24 21:44:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:17,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53325679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:17,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:17,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-24 21:44:17,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915293548] [2023-11-24 21:44:17,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:17,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:44:17,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:44:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:17,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 69 [2023-11-24 21:44:17,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 33.333333333333336) internal successors, (300), 9 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:17,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 69 [2023-11-24 21:44:17,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:18,032 INFO L124 PetriNetUnfolderBase]: 27/100 cut-off events. [2023-11-24 21:44:18,032 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-24 21:44:18,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 100 events. 27/100 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 227 event pairs, 18 based on Foata normal form. 20/119 useless extension candidates. Maximal degree in co-relation 179. Up to 57 conditions per place. [2023-11-24 21:44:18,041 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 23 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-24 21:44:18,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 128 flow [2023-11-24 21:44:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:44:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:44:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-24 21:44:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471014492753623 [2023-11-24 21:44:18,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-24 21:44:18,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-24 21:44:18,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:18,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-24 21:44:18,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:18,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:18,099 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:18,099 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 127 flow. Second operand 4 states and 151 transitions. [2023-11-24 21:44:18,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 128 flow [2023-11-24 21:44:18,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:44:18,101 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2023-11-24 21:44:18,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-24 21:44:18,102 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -29 predicate places. [2023-11-24 21:44:18,102 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2023-11-24 21:44:18,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.333333333333336) internal successors, (300), 9 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:18,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:18,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 21:44:18,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-24 21:44:18,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:18,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 715384664, now seen corresponding path program 1 times [2023-11-24 21:44:18,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378169530] [2023-11-24 21:44:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:18,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:44:18,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:44:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:44:18,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:44:18,387 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:44:18,388 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 21:44:18,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-24 21:44:18,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 21:44:18,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-11-24 21:44:18,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-24 21:44:18,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-11-24 21:44:18,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 21:44:18,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:44:18,392 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:44:18,396 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:44:18,396 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 21:44:18,430 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:44:18,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 94 transitions, 204 flow [2023-11-24 21:44:18,463 INFO L124 PetriNetUnfolderBase]: 36/186 cut-off events. [2023-11-24 21:44:18,463 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-24 21:44:18,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 186 events. 36/186 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 799 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 113. Up to 9 conditions per place. [2023-11-24 21:44:18,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 94 transitions, 204 flow [2023-11-24 21:44:18,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 94 transitions, 204 flow [2023-11-24 21:44:18,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:18,470 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;@de6d88d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:18,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:44:18,473 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:18,473 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:44:18,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:18,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:18,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:18,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:18,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash 467356, now seen corresponding path program 1 times [2023-11-24 21:44:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:18,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164606592] [2023-11-24 21:44:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:18,521 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 21:44:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:18,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164606592] [2023-11-24 21:44:18,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164606592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:18,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:18,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:18,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071679456] [2023-11-24 21:44:18,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:18,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:18,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 94 [2023-11-24 21:44:18,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 204 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 21:44:18,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:18,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 94 [2023-11-24 21:44:18,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:19,528 INFO L124 PetriNetUnfolderBase]: 3083/6112 cut-off events. [2023-11-24 21:44:19,529 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-24 21:44:19,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10945 conditions, 6112 events. 3083/6112 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 47824 event pairs, 2399 based on Foata normal form. 1572/7303 useless extension candidates. Maximal degree in co-relation 8003. Up to 4054 conditions per place. [2023-11-24 21:44:19,627 INFO L140 encePairwiseOnDemand]: 74/94 looper letters, 53 selfloop transitions, 2 changer transitions 1/93 dead transitions. [2023-11-24 21:44:19,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 314 flow [2023-11-24 21:44:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-11-24 21:44:19,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6985815602836879 [2023-11-24 21:44:19,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-11-24 21:44:19,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-11-24 21:44:19,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:19,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-11-24 21:44:19,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:19,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:19,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:19,633 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 204 flow. Second operand 3 states and 197 transitions. [2023-11-24 21:44:19,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 314 flow [2023-11-24 21:44:19,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:44:19,636 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 168 flow [2023-11-24 21:44:19,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-11-24 21:44:19,638 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2023-11-24 21:44:19,638 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 168 flow [2023-11-24 21:44:19,638 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 21:44:19,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:19,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:19,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:44:19,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:19,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash 467357, now seen corresponding path program 1 times [2023-11-24 21:44:19,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:19,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924897753] [2023-11-24 21:44:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:19,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:19,707 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 21:44:19,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:19,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924897753] [2023-11-24 21:44:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924897753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:19,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:19,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:19,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50580796] [2023-11-24 21:44:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:19,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:19,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 94 [2023-11-24 21:44:19,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:19,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:19,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 94 [2023-11-24 21:44:19,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:20,507 INFO L124 PetriNetUnfolderBase]: 2662/5493 cut-off events. [2023-11-24 21:44:20,507 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-11-24 21:44:20,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9903 conditions, 5493 events. 2662/5493 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 43400 event pairs, 2246 based on Foata normal form. 1/5097 useless extension candidates. Maximal degree in co-relation 8739. Up to 4094 conditions per place. [2023-11-24 21:44:20,557 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 45 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-24 21:44:20,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 284 flow [2023-11-24 21:44:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-24 21:44:20,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599290780141844 [2023-11-24 21:44:20,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-24 21:44:20,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-24 21:44:20,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:20,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-24 21:44:20,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:20,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:20,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:20,565 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 168 flow. Second operand 3 states and 169 transitions. [2023-11-24 21:44:20,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 284 flow [2023-11-24 21:44:20,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 85 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:20,581 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 178 flow [2023-11-24 21:44:20,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-11-24 21:44:20,585 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2023-11-24 21:44:20,585 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 178 flow [2023-11-24 21:44:20,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:20,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:20,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 21:44:20,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:44:20,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:20,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2131722382, now seen corresponding path program 1 times [2023-11-24 21:44:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:20,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862645032] [2023-11-24 21:44:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:20,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:20,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862645032] [2023-11-24 21:44:20,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862645032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:20,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496045746] [2023-11-24 21:44:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:20,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:20,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:20,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:20,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:44:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:20,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:44:20,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:20,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-24 21:44:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:20,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496045746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:21,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-24 21:44:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659167048] [2023-11-24 21:44:21,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:44:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:44:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:21,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 94 [2023-11-24 21:44:21,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 41.333333333333336) internal successors, (372), 9 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:21,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:21,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 94 [2023-11-24 21:44:21,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:21,516 INFO L124 PetriNetUnfolderBase]: 657/1295 cut-off events. [2023-11-24 21:44:21,516 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2023-11-24 21:44:21,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2554 conditions, 1295 events. 657/1295 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7579 event pairs, 96 based on Foata normal form. 220/1456 useless extension candidates. Maximal degree in co-relation 2218. Up to 840 conditions per place. [2023-11-24 21:44:21,526 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 53 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-11-24 21:44:21,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 276 flow [2023-11-24 21:44:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:44:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-24 21:44:21,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2023-11-24 21:44:21,529 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-24 21:44:21,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-24 21:44:21,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:21,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-24 21:44:21,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:21,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:21,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:21,533 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 178 flow. Second operand 5 states and 255 transitions. [2023-11-24 21:44:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 276 flow [2023-11-24 21:44:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:21,537 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 106 flow [2023-11-24 21:44:21,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-24 21:44:21,538 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -26 predicate places. [2023-11-24 21:44:21,538 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 106 flow [2023-11-24 21:44:21,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 41.333333333333336) internal successors, (372), 9 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:21,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:21,539 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-24 21:44:21,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:21,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:21,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:21,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 196147766, now seen corresponding path program 1 times [2023-11-24 21:44:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:21,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610721953] [2023-11-24 21:44:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:44:21,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:44:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:44:21,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:44:21,809 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:44:21,809 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 21:44:21,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-24 21:44:21,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 21:44:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-11-24 21:44:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-24 21:44:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-11-24 21:44:21,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 21:44:21,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:44:21,811 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:44:21,818 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:44:21,818 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 21:44:21,857 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-24 21:44:21,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 119 transitions, 265 flow [2023-11-24 21:44:21,890 INFO L124 PetriNetUnfolderBase]: 54/284 cut-off events. [2023-11-24 21:44:21,890 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-24 21:44:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 284 events. 54/284 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1295 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 197. Up to 12 conditions per place. [2023-11-24 21:44:21,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 119 transitions, 265 flow [2023-11-24 21:44:21,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 119 transitions, 265 flow [2023-11-24 21:44:21,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:21,902 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;@de6d88d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:21,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:44:21,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:21,905 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:44:21,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:21,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:21,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:21,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:21,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 585523, now seen corresponding path program 1 times [2023-11-24 21:44:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783513781] [2023-11-24 21:44:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:21,943 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 21:44:21,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:21,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783513781] [2023-11-24 21:44:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783513781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:21,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:21,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896711690] [2023-11-24 21:44:21,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:21,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 119 [2023-11-24 21:44:21,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:21,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:21,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 119 [2023-11-24 21:44:21,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:31,934 INFO L124 PetriNetUnfolderBase]: 45245/75471 cut-off events. [2023-11-24 21:44:31,935 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2023-11-24 21:44:32,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139284 conditions, 75471 events. 45245/75471 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 2637. Compared 700922 event pairs, 38052 based on Foata normal form. 22911/94834 useless extension candidates. Maximal degree in co-relation 50173. Up to 53646 conditions per place. [2023-11-24 21:44:32,581 INFO L140 encePairwiseOnDemand]: 93/119 looper letters, 73 selfloop transitions, 2 changer transitions 1/121 dead transitions. [2023-11-24 21:44:32,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 121 transitions, 421 flow [2023-11-24 21:44:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-11-24 21:44:32,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7086834733893558 [2023-11-24 21:44:32,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-11-24 21:44:32,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-11-24 21:44:32,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:32,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-11-24 21:44:32,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:32,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:32,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:32,587 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 265 flow. Second operand 3 states and 253 transitions. [2023-11-24 21:44:32,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 121 transitions, 421 flow [2023-11-24 21:44:32,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 121 transitions, 421 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:44:32,595 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 217 flow [2023-11-24 21:44:32,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2023-11-24 21:44:32,596 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2023-11-24 21:44:32,597 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 217 flow [2023-11-24 21:44:32,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:32,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:32,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:32,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:44:32,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:32,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:32,598 INFO L85 PathProgramCache]: Analyzing trace with hash 585524, now seen corresponding path program 1 times [2023-11-24 21:44:32,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:32,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330216102] [2023-11-24 21:44:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:32,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:32,702 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 21:44:32,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330216102] [2023-11-24 21:44:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330216102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:32,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814783156] [2023-11-24 21:44:32,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:32,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:32,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:32,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 119 [2023-11-24 21:44:32,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:32,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:32,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 119 [2023-11-24 21:44:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:39,489 INFO L124 PetriNetUnfolderBase]: 40330/68486 cut-off events. [2023-11-24 21:44:39,489 INFO L125 PetriNetUnfolderBase]: For 3949/3949 co-relation queries the response was YES. [2023-11-24 21:44:39,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126927 conditions, 68486 events. 40330/68486 cut-off events. For 3949/3949 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 636704 event pairs, 24594 based on Foata normal form. 1/64605 useless extension candidates. Maximal degree in co-relation 112870. Up to 55194 conditions per place. [2023-11-24 21:44:40,248 INFO L140 encePairwiseOnDemand]: 115/119 looper letters, 56 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-11-24 21:44:40,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 355 flow [2023-11-24 21:44:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-11-24 21:44:40,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-24 21:44:40,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-11-24 21:44:40,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-11-24 21:44:40,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:40,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-11-24 21:44:40,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:40,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:40,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:40,256 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 217 flow. Second operand 3 states and 204 transitions. [2023-11-24 21:44:40,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 355 flow [2023-11-24 21:44:40,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:40,713 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 227 flow [2023-11-24 21:44:40,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2023-11-24 21:44:40,716 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2023-11-24 21:44:40,716 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 227 flow [2023-11-24 21:44:40,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:40,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:40,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 21:44:40,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:44:40,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:40,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash -403372818, now seen corresponding path program 1 times [2023-11-24 21:44:40,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:40,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814247718] [2023-11-24 21:44:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:40,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814247718] [2023-11-24 21:44:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814247718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409976648] [2023-11-24 21:44:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:40,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:40,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:44:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:40,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:44:40,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:41,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-24 21:44:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:41,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409976648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:41,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:41,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-24 21:44:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883859183] [2023-11-24 21:44:41,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:41,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:44:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:44:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:44:41,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 119 [2023-11-24 21:44:41,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:41,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:41,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 119 [2023-11-24 21:44:41,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:48,778 INFO L124 PetriNetUnfolderBase]: 41250/78738 cut-off events. [2023-11-24 21:44:48,778 INFO L125 PetriNetUnfolderBase]: For 5118/5118 co-relation queries the response was YES. [2023-11-24 21:44:48,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134847 conditions, 78738 events. 41250/78738 cut-off events. For 5118/5118 co-relation queries the response was YES. Maximal size of possible extension queue 2299. Compared 834518 event pairs, 2691 based on Foata normal form. 1120/74913 useless extension candidates. Maximal degree in co-relation 13516. Up to 38087 conditions per place. [2023-11-24 21:44:49,256 INFO L140 encePairwiseOnDemand]: 115/119 looper letters, 131 selfloop transitions, 6 changer transitions 0/182 dead transitions. [2023-11-24 21:44:49,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 182 transitions, 679 flow [2023-11-24 21:44:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:44:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2023-11-24 21:44:49,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592436974789916 [2023-11-24 21:44:49,261 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 423 transitions. [2023-11-24 21:44:49,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 423 transitions. [2023-11-24 21:44:49,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:49,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 423 transitions. [2023-11-24 21:44:49,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.5) internal successors, (423), 6 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 21:44:49,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 119.0) internal successors, (833), 7 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,266 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 119.0) internal successors, (833), 7 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,267 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 227 flow. Second operand 6 states and 423 transitions. [2023-11-24 21:44:49,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 182 transitions, 679 flow [2023-11-24 21:44:49,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 182 transitions, 677 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:49,273 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 241 flow [2023-11-24 21:44:49,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2023-11-24 21:44:49,274 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 2 predicate places. [2023-11-24 21:44:49,274 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 241 flow [2023-11-24 21:44:49,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:49,275 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-24 21:44:49,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ced5a34-3bea-4e66-b9af-2eda68fdc629/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:49,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:49,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1358798013, now seen corresponding path program 1 times [2023-11-24 21:44:49,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:49,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829698129] [2023-11-24 21:44:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:44:49,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:44:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:44:49,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:44:49,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:44:49,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 21:44:49,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-24 21:44:49,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 21:44:49,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-11-24 21:44:49,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-24 21:44:49,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-11-24 21:44:49,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 21:44:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:44:49,532 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:44:49,533 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:44:49,533 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-24 21:44:49,563 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:44:49,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 144 transitions, 328 flow [2023-11-24 21:44:49,821 INFO L124 PetriNetUnfolderBase]: 80/426 cut-off events. [2023-11-24 21:44:49,821 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-24 21:44:49,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 426 events. 80/426 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2103 event pairs, 6 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 308. Up to 32 conditions per place. [2023-11-24 21:44:49,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 144 transitions, 328 flow [2023-11-24 21:44:49,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 144 transitions, 328 flow [2023-11-24 21:44:49,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:49,830 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;@de6d88d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:49,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:44:49,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:49,832 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:44:49,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:49,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:49,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:49,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-11-24 21:44:49,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash 728515, now seen corresponding path program 1 times [2023-11-24 21:44:49,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:49,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515268879] [2023-11-24 21:44:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:49,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515268879] [2023-11-24 21:44:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515268879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:49,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:49,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:49,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656045815] [2023-11-24 21:44:49,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:49,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:49,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:49,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-11-24 21:44:49,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 328 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:49,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-11-24 21:44:49,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand