./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.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_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/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_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/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_b583900e-0287-4b71-bcfe-6506f0fda983/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 f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:04:34,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:04:35,032 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:04:35,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:04:35,048 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:04:35,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:04:35,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:04:35,101 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:04:35,102 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:04:35,108 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:04:35,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:04:35,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:04:35,110 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:04:35,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:04:35,113 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:04:35,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:04:35,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:04:35,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:04:35,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:04:35,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:04:35,116 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:04:35,117 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:04:35,117 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:04:35,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:04:35,118 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:04:35,119 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:04:35,119 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:04:35,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:04:35,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:04:35,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:04:35,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:04:35,124 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:04:35,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:35,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:04:35,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:04:35,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:04:35,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:04:35,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:04:35,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:04:35,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:04:35,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:04:35,127 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_b583900e-0287-4b71-bcfe-6506f0fda983/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2023-11-24 22:04:35,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:04:35,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:04:35,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:04:35,504 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:04:35,504 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:04:35,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-24 22:04:38,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:04:38,977 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:04:38,978 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-24 22:04:38,997 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/data/39d87337f/80068a9a1f7b4815bce68d553bcf5563/FLAGefaeca659 [2023-11-24 22:04:39,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/data/39d87337f/80068a9a1f7b4815bce68d553bcf5563 [2023-11-24 22:04:39,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:04:39,029 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:04:39,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:39,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:04:39,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:04:39,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4023bdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39, skipping insertion in model container [2023-11-24 22:04:39,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,095 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:04:39,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:39,602 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:04:39,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:39,689 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:04:39,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39 WrapperNode [2023-11-24 22:04:39,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:39,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:39,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:04:39,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:04:39,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,733 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,765 INFO L138 Inliner]: procedures = 167, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-24 22:04:39,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:39,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:04:39,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:04:39,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:04:39,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,781 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,795 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-24 22:04:39,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,805 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,809 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:04:39,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:04:39,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:04:39,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:04:39,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:39,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:04:39,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:04:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 22:04:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 22:04:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:04:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:04:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:04:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:04:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:04:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:04:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:04:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:04:39,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:04:39,919 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:04:40,091 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:04:40,093 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:04:40,292 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:04:40,411 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:04:40,411 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 22:04:40,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:40 BoogieIcfgContainer [2023-11-24 22:04:40,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:04:40,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:04:40,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:04:40,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:04:40,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:04:39" (1/3) ... [2023-11-24 22:04:40,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8fe99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:40, skipping insertion in model container [2023-11-24 22:04:40,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (2/3) ... [2023-11-24 22:04:40,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8fe99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:40, skipping insertion in model container [2023-11-24 22:04:40,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:40" (3/3) ... [2023-11-24 22:04:40,422 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-11-24 22:04:40,444 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:04:40,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-24 22:04:40,445 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:04:40,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:04:40,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 29 transitions, 62 flow [2023-11-24 22:04:40,635 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-24 22:04:40,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:40,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 6/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 92 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-24 22:04:40,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 29 transitions, 62 flow [2023-11-24 22:04:40,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 29 transitions, 62 flow [2023-11-24 22:04:40,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:04:40,687 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;@4fa8be18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:04:40,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 22:04:40,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:04:40,706 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:04:40,707 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:40,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:40,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:04:40,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 221963, now seen corresponding path program 1 times [2023-11-24 22:04:40,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984421129] [2023-11-24 22:04:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:41,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:41,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984421129] [2023-11-24 22:04:41,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984421129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:41,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:41,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508175410] [2023-11-24 22:04:41,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:41,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:41,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:41,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:41,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 29 [2023-11-24 22:04:41,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:41,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 29 [2023-11-24 22:04:41,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:41,179 INFO L124 PetriNetUnfolderBase]: 31/87 cut-off events. [2023-11-24 22:04:41,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 87 events. 31/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 279 event pairs, 15 based on Foata normal form. 8/83 useless extension candidates. Maximal degree in co-relation 130. Up to 54 conditions per place. [2023-11-24 22:04:41,182 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 12 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-24 22:04:41,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 74 flow [2023-11-24 22:04:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-24 22:04:41,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2023-11-24 22:04:41,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-24 22:04:41,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-24 22:04:41,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:41,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-24 22:04:41,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,218 INFO L175 Difference]: Start difference. First operand has 26 places, 29 transitions, 62 flow. Second operand 3 states and 47 transitions. [2023-11-24 22:04:41,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 74 flow [2023-11-24 22:04:41,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:04:41,226 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 50 flow [2023-11-24 22:04:41,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-11-24 22:04:41,236 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-24 22:04:41,236 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 50 flow [2023-11-24 22:04:41,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:41,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:41,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:04:41,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:04:41,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash 221964, now seen corresponding path program 1 times [2023-11-24 22:04:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:41,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853495273] [2023-11-24 22:04:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:41,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:41,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:41,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853495273] [2023-11-24 22:04:41,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853495273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:41,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:41,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:41,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652484509] [2023-11-24 22:04:41,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:41,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:41,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-24 22:04:41,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:41,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-24 22:04:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:41,455 INFO L124 PetriNetUnfolderBase]: 22/65 cut-off events. [2023-11-24 22:04:41,455 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:04:41,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 65 events. 22/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 10 based on Foata normal form. 7/63 useless extension candidates. Maximal degree in co-relation 104. Up to 39 conditions per place. [2023-11-24 22:04:41,457 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 11 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-24 22:04:41,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 72 flow [2023-11-24 22:04:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-24 22:04:41,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-11-24 22:04:41,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-24 22:04:41,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-24 22:04:41,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:41,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-24 22:04:41,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,462 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 50 flow. Second operand 3 states and 46 transitions. [2023-11-24 22:04:41,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 72 flow [2023-11-24 22:04:41,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:04:41,464 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 49 flow [2023-11-24 22:04:41,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-24 22:04:41,465 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-24 22:04:41,465 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 49 flow [2023-11-24 22:04:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:41,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 22:04:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:04:41,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:04:41,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1757957947, now seen corresponding path program 1 times [2023-11-24 22:04:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:41,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126249991] [2023-11-24 22:04:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:41,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:04:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:41,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:04:41,522 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:04:41,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-24 22:04:41,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-24 22:04:41,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-24 22:04:41,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-24 22:04:41,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-24 22:04:41,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-24 22:04:41,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:04:41,527 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 22:04:41,530 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:04:41,530 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 22:04:41,569 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:04:41,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 48 transitions, 106 flow [2023-11-24 22:04:41,584 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2023-11-24 22:04:41,584 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:04:41,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 63 events. 12/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 170 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 44. Up to 3 conditions per place. [2023-11-24 22:04:41,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 48 transitions, 106 flow [2023-11-24 22:04:41,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 48 transitions, 106 flow [2023-11-24 22:04:41,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:04:41,590 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;@4fa8be18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:04:41,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 22:04:41,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:04:41,593 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:04:41,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:41,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:41,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:41,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:04:41,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash 269627, now seen corresponding path program 1 times [2023-11-24 22:04:41,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:41,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84636035] [2023-11-24 22:04:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:41,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:41,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84636035] [2023-11-24 22:04:41,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84636035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:41,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:41,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212894278] [2023-11-24 22:04:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:41,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:41,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-24 22:04:41,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:41,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-24 22:04:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:41,814 INFO L124 PetriNetUnfolderBase]: 409/762 cut-off events. [2023-11-24 22:04:41,815 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 22:04:41,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 762 events. 409/762 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3641 event pairs, 225 based on Foata normal form. 97/726 useless extension candidates. Maximal degree in co-relation 227. Up to 552 conditions per place. [2023-11-24 22:04:41,827 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-24 22:04:41,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 130 flow [2023-11-24 22:04:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-24 22:04:41,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-24 22:04:41,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-24 22:04:41,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-24 22:04:41,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:41,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-24 22:04:41,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,833 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 106 flow. Second operand 3 states and 79 transitions. [2023-11-24 22:04:41,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 130 flow [2023-11-24 22:04:41,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:04:41,836 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 88 flow [2023-11-24 22:04:41,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-24 22:04:41,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-24 22:04:41,838 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 88 flow [2023-11-24 22:04:41,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:41,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:41,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:04:41,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:04:41,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 269628, now seen corresponding path program 1 times [2023-11-24 22:04:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:41,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951258255] [2023-11-24 22:04:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951258255] [2023-11-24 22:04:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951258255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:41,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787725642] [2023-11-24 22:04:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:41,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-24 22:04:41,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:41,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:41,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-24 22:04:41,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:42,056 INFO L124 PetriNetUnfolderBase]: 301/577 cut-off events. [2023-11-24 22:04:42,056 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 22:04:42,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 577 events. 301/577 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2663 event pairs, 160 based on Foata normal form. 43/518 useless extension candidates. Maximal degree in co-relation 1000. Up to 405 conditions per place. [2023-11-24 22:04:42,064 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-24 22:04:42,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 128 flow [2023-11-24 22:04:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-24 22:04:42,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-24 22:04:42,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-24 22:04:42,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-24 22:04:42,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:42,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-24 22:04:42,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:42,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:42,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:42,072 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 88 flow. Second operand 3 states and 76 transitions. [2023-11-24 22:04:42,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 128 flow [2023-11-24 22:04:42,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:04:42,075 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 87 flow [2023-11-24 22:04:42,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-24 22:04:42,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-24 22:04:42,077 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 87 flow [2023-11-24 22:04:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:42,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:04:42,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:04:42,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -446580659, now seen corresponding path program 1 times [2023-11-24 22:04:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:42,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884656344] [2023-11-24 22:04:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:42,119 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:04:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:42,149 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:04:42,149 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:04:42,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 7 remaining) [2023-11-24 22:04:42,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-24 22:04:42,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 22:04:42,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 22:04:42,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-24 22:04:42,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-24 22:04:42,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 22:04:42,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:04:42,152 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 22:04:42,158 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-11-24 22:04:42,158 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 22:04:42,177 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-24 22:04:42,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 10:04:42 BasicIcfg [2023-11-24 22:04:42,190 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 22:04:42,191 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:04:42,191 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:04:42,191 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:04:42,192 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:40" (3/4) ... [2023-11-24 22:04:42,194 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 22:04:42,196 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:04:42,197 INFO L158 Benchmark]: Toolchain (without parser) took 3168.12ms. Allocated memory is still 182.5MB. Free memory was 133.3MB in the beginning and 133.5MB in the end (delta: -205.0kB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2023-11-24 22:04:42,197 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 125.8MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:42,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 660.24ms. Allocated memory is still 182.5MB. Free memory was 132.6MB in the beginning and 113.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-24 22:04:42,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.58ms. Allocated memory is still 182.5MB. Free memory was 113.7MB in the beginning and 111.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:04:42,199 INFO L158 Benchmark]: Boogie Preprocessor took 47.11ms. Allocated memory is still 182.5MB. Free memory was 111.5MB in the beginning and 109.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:04:42,200 INFO L158 Benchmark]: RCFGBuilder took 597.01ms. Allocated memory is still 182.5MB. Free memory was 109.5MB in the beginning and 89.8MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-24 22:04:42,200 INFO L158 Benchmark]: TraceAbstraction took 1775.70ms. Allocated memory is still 182.5MB. Free memory was 89.3MB in the beginning and 133.5MB in the end (delta: -44.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:42,201 INFO L158 Benchmark]: Witness Printer took 4.99ms. Allocated memory is still 182.5MB. Free memory is still 133.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:42,204 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 125.8MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 660.24ms. Allocated memory is still 182.5MB. Free memory was 132.6MB in the beginning and 113.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.58ms. Allocated memory is still 182.5MB. Free memory was 113.7MB in the beginning and 111.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.11ms. Allocated memory is still 182.5MB. Free memory was 111.5MB in the beginning and 109.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 597.01ms. Allocated memory is still 182.5MB. Free memory was 109.5MB in the beginning and 89.8MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 1775.70ms. Allocated memory is still 182.5MB. Free memory was 89.3MB in the beginning and 133.5MB in the end (delta: -44.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.99ms. Allocated memory is still 182.5MB. Free memory is still 133.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/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 -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2023-11-24 22:04:45,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:04:45,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:04:45,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:04:45,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:04:45,881 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:04:45,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-24 22:04:49,224 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:04:49,560 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:04:49,561 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-24 22:04:49,575 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/data/c69d64ed2/07628d225c674c06969289651c718172/FLAG18366355a [2023-11-24 22:04:49,591 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/data/c69d64ed2/07628d225c674c06969289651c718172 [2023-11-24 22:04:49,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:04:49,595 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:04:49,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:49,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:04:49,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:04:49,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:49" (1/1) ... [2023-11-24 22:04:49,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530223db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:49, skipping insertion in model container [2023-11-24 22:04:49,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:49" (1/1) ... [2023-11-24 22:04:49,669 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:04:50,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:50,221 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:04:50,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:50,418 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:04:50,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50 WrapperNode [2023-11-24 22:04:50,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:50,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:50,421 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:04:50,421 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:04:50,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,507 INFO L138 Inliner]: procedures = 170, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-11-24 22:04:50,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:50,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:04:50,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:04:50,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:04:50,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,535 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,558 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-24 22:04:50,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,577 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,580 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:04:50,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:04:50,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:04:50,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:04:50,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (1/1) ... [2023-11-24 22:04:50,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:50,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:04:50,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:04:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 22:04:50,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 22:04:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:04:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:04:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:04:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 22:04:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 22:04:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 22:04:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 22:04:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:04:50,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:04:50,685 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:04:50,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:04:50,840 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:04:51,105 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:04:51,198 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:04:51,198 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 22:04:51,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:51 BoogieIcfgContainer [2023-11-24 22:04:51,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:04:51,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:04:51,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:04:51,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:04:51,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:04:49" (1/3) ... [2023-11-24 22:04:51,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca66aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:51, skipping insertion in model container [2023-11-24 22:04:51,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:50" (2/3) ... [2023-11-24 22:04:51,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca66aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:51, skipping insertion in model container [2023-11-24 22:04:51,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:51" (3/3) ... [2023-11-24 22:04:51,208 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-11-24 22:04:51,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:04:51,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-24 22:04:51,226 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:04:51,269 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:04:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 29 transitions, 62 flow [2023-11-24 22:04:51,346 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-24 22:04:51,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:51,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 6/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 92 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-24 22:04:51,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 29 transitions, 62 flow [2023-11-24 22:04:51,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 29 transitions, 62 flow [2023-11-24 22:04:51,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:04:51,403 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;@4b38c50d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:04:51,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 22:04:51,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:04:51,411 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:04:51,411 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:51,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:51,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:51,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:04:51,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash 223949, now seen corresponding path program 1 times [2023-11-24 22:04:51,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:51,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026212587] [2023-11-24 22:04:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:51,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:51,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:04:51,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 22:04:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:51,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:51,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:51,629 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 6 treesize of output 7 [2023-11-24 22:04:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:51,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:51,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026212587] [2023-11-24 22:04:51,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026212587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:51,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:51,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323014310] [2023-11-24 22:04:51,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:51,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:51,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:51,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 29 [2023-11-24 22:04:51,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:51,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 29 [2023-11-24 22:04:51,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:51,801 INFO L124 PetriNetUnfolderBase]: 31/87 cut-off events. [2023-11-24 22:04:51,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:51,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 87 events. 31/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 279 event pairs, 15 based on Foata normal form. 8/83 useless extension candidates. Maximal degree in co-relation 130. Up to 54 conditions per place. [2023-11-24 22:04:51,805 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 12 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-24 22:04:51,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 74 flow [2023-11-24 22:04:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-24 22:04:51,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2023-11-24 22:04:51,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-24 22:04:51,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-24 22:04:51,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:51,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-24 22:04:51,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,831 INFO L175 Difference]: Start difference. First operand has 26 places, 29 transitions, 62 flow. Second operand 3 states and 47 transitions. [2023-11-24 22:04:51,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 74 flow [2023-11-24 22:04:51,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:04:51,837 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 50 flow [2023-11-24 22:04:51,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-11-24 22:04:51,843 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-24 22:04:51,843 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 50 flow [2023-11-24 22:04:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:51,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:51,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-24 22:04:52,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:52,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:04:52,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash 223950, now seen corresponding path program 1 times [2023-11-24 22:04:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:52,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785455553] [2023-11-24 22:04:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:52,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:52,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:04:52,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 22:04:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:52,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:04:52,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:52,137 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 6 treesize of output 5 [2023-11-24 22:04:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:52,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:52,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:52,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785455553] [2023-11-24 22:04:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785455553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:52,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:52,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:52,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407159427] [2023-11-24 22:04:52,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:52,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:52,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-24 22:04:52,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:52,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:52,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-24 22:04:52,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:52,247 INFO L124 PetriNetUnfolderBase]: 22/65 cut-off events. [2023-11-24 22:04:52,248 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:04:52,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 65 events. 22/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 10 based on Foata normal form. 7/63 useless extension candidates. Maximal degree in co-relation 104. Up to 39 conditions per place. [2023-11-24 22:04:52,249 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 11 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-24 22:04:52,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 72 flow [2023-11-24 22:04:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-24 22:04:52,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-11-24 22:04:52,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-24 22:04:52,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-24 22:04:52,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:52,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-24 22:04:52,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:52,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:52,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:52,266 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 50 flow. Second operand 3 states and 46 transitions. [2023-11-24 22:04:52,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 72 flow [2023-11-24 22:04:52,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:04:52,270 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 49 flow [2023-11-24 22:04:52,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-24 22:04:52,272 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-24 22:04:52,272 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 49 flow [2023-11-24 22:04:52,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:52,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:52,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 22:04:52,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:52,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:52,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:04:52,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -733130299, now seen corresponding path program 1 times [2023-11-24 22:04:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:52,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067499666] [2023-11-24 22:04:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:52,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:52,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:04:52,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 22:04:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:52,580 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:04:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:52,618 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-24 22:04:52,619 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:04:52,620 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-24 22:04:52,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-24 22:04:52,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-24 22:04:52,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-24 22:04:52,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-24 22:04:52,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-24 22:04:52,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:52,824 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 22:04:52,827 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:04:52,827 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 22:04:52,862 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:04:52,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 48 transitions, 106 flow [2023-11-24 22:04:52,877 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2023-11-24 22:04:52,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:04:52,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 63 events. 12/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 170 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 44. Up to 3 conditions per place. [2023-11-24 22:04:52,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 48 transitions, 106 flow [2023-11-24 22:04:52,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 48 transitions, 106 flow [2023-11-24 22:04:52,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:04:52,883 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;@4b38c50d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:04:52,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 22:04:52,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:04:52,886 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:04:52,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:52,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:52,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:52,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:04:52,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:52,888 INFO L85 PathProgramCache]: Analyzing trace with hash 271613, now seen corresponding path program 1 times [2023-11-24 22:04:52,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:52,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407566508] [2023-11-24 22:04:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:52,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:52,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:52,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:04:52,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 22:04:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:52,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:52,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:52,968 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 6 treesize of output 7 [2023-11-24 22:04:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:52,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:52,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:52,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407566508] [2023-11-24 22:04:52,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407566508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:52,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:52,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450772083] [2023-11-24 22:04:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:52,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:52,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-24 22:04:52,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:52,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:52,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-24 22:04:52,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:53,199 INFO L124 PetriNetUnfolderBase]: 409/762 cut-off events. [2023-11-24 22:04:53,199 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 22:04:53,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 762 events. 409/762 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3641 event pairs, 225 based on Foata normal form. 97/726 useless extension candidates. Maximal degree in co-relation 227. Up to 552 conditions per place. [2023-11-24 22:04:53,211 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-24 22:04:53,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 130 flow [2023-11-24 22:04:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-24 22:04:53,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-24 22:04:53,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-24 22:04:53,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-24 22:04:53,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:53,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-24 22:04:53,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,218 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 106 flow. Second operand 3 states and 79 transitions. [2023-11-24 22:04:53,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 130 flow [2023-11-24 22:04:53,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:04:53,221 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 88 flow [2023-11-24 22:04:53,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-24 22:04:53,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-24 22:04:53,224 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 88 flow [2023-11-24 22:04:53,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:53,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:53,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-24 22:04:53,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:53,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:04:53,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash 271614, now seen corresponding path program 1 times [2023-11-24 22:04:53,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:53,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470279898] [2023-11-24 22:04:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:53,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:53,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:04:53,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 22:04:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:53,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:04:53,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:53,516 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 6 treesize of output 5 [2023-11-24 22:04:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:53,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:53,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470279898] [2023-11-24 22:04:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470279898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:53,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:53,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:53,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242094552] [2023-11-24 22:04:53,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:53,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:53,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:53,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-24 22:04:53,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:53,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-24 22:04:53,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:53,773 INFO L124 PetriNetUnfolderBase]: 301/577 cut-off events. [2023-11-24 22:04:53,773 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 22:04:53,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 577 events. 301/577 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2663 event pairs, 160 based on Foata normal form. 43/518 useless extension candidates. Maximal degree in co-relation 1000. Up to 405 conditions per place. [2023-11-24 22:04:53,797 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-24 22:04:53,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 128 flow [2023-11-24 22:04:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-24 22:04:53,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-24 22:04:53,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-24 22:04:53,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-24 22:04:53,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:53,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-24 22:04:53,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,805 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 88 flow. Second operand 3 states and 76 transitions. [2023-11-24 22:04:53,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 128 flow [2023-11-24 22:04:53,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:04:53,809 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 87 flow [2023-11-24 22:04:53,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-24 22:04:53,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-24 22:04:53,811 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 87 flow [2023-11-24 22:04:53,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:53,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:53,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-24 22:04:54,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:54,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:04:54,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 865278349, now seen corresponding path program 1 times [2023-11-24 22:04:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:54,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725441624] [2023-11-24 22:04:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:54,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 22:04:54,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 22:04:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:54,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:04:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:04:54,190 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-24 22:04:54,190 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:04:54,191 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 7 remaining) [2023-11-24 22:04:54,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-24 22:04:54,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 22:04:54,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 22:04:54,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-24 22:04:54,192 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-24 22:04:54,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 22:04:54,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:54,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b583900e-0287-4b71-bcfe-6506f0fda983/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:54,401 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 22:04:54,406 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-11-24 22:04:54,407 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 22:04:54,435 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-24 22:04:54,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 10:04:54 BasicIcfg [2023-11-24 22:04:54,462 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 22:04:54,463 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:04:54,464 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:04:54,464 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:04:54,465 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:51" (3/4) ... [2023-11-24 22:04:54,467 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 22:04:54,468 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:04:54,469 INFO L158 Benchmark]: Toolchain (without parser) took 4873.78ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 70.9MB in the beginning and 78.2MB in the end (delta: -7.3MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2023-11-24 22:04:54,470 INFO L158 Benchmark]: CDTParser took 1.46ms. Allocated memory is still 67.1MB. Free memory is still 43.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:54,470 INFO L158 Benchmark]: CACSL2BoogieTranslator took 821.03ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 72.5MB in the end (delta: -1.9MB). Peak memory consumption was 24.0MB. Max. memory is 16.1GB. [2023-11-24 22:04:54,471 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.47ms. Allocated memory is still 96.5MB. Free memory was 72.1MB in the beginning and 70.4MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 22:04:54,471 INFO L158 Benchmark]: Boogie Preprocessor took 82.75ms. Allocated memory is still 96.5MB. Free memory was 70.4MB in the beginning and 67.9MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:54,472 INFO L158 Benchmark]: RCFGBuilder took 607.05ms. Allocated memory is still 96.5MB. Free memory was 67.9MB in the beginning and 45.8MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-24 22:04:54,472 INFO L158 Benchmark]: TraceAbstraction took 3261.51ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 45.3MB in the beginning and 78.2MB in the end (delta: -32.9MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:54,473 INFO L158 Benchmark]: Witness Printer took 5.21ms. Allocated memory is still 117.4MB. Free memory is still 78.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:54,476 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.46ms. Allocated memory is still 67.1MB. Free memory is still 43.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 821.03ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 72.5MB in the end (delta: -1.9MB). Peak memory consumption was 24.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.47ms. Allocated memory is still 96.5MB. Free memory was 72.1MB in the beginning and 70.4MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 82.75ms. Allocated memory is still 96.5MB. Free memory was 70.4MB in the beginning and 67.9MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 607.05ms. Allocated memory is still 96.5MB. Free memory was 67.9MB in the beginning and 45.8MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 3261.51ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 45.3MB in the beginning and 78.2MB in the end (delta: -32.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.21ms. Allocated memory is still 117.4MB. Free memory is still 78.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i