./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu --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 e59f443204e7aefe0ca3d3f3de602e655d8cad2a85fca6022b51e9f5ca070bcf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:09,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:09,531 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:03:09,539 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:09,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:09,583 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:09,584 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:09,585 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:09,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:09,595 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:09,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:09,597 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:09,598 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:09,600 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:09,601 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:09,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:09,602 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:09,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:09,603 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:03:09,604 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:03:09,605 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:03:09,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:09,606 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:03:09,607 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:03:09,607 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:09,608 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:09,609 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:09,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:09,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:09,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:09,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:09,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:09,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:09,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:09,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:09,615 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:09,615 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:09,615 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:09,616 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_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59f443204e7aefe0ca3d3f3de602e655d8cad2a85fca6022b51e9f5ca070bcf [2023-11-19 08:03:09,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:09,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:10,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:10,029 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:10,030 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:10,032 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i [2023-11-19 08:03:13,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:13,417 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:13,417 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i [2023-11-19 08:03:13,438 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/data/0492e7f5b/a40b73f7839747b79ec85190887e48ff/FLAG4cb2a9474 [2023-11-19 08:03:13,472 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/data/0492e7f5b/a40b73f7839747b79ec85190887e48ff [2023-11-19 08:03:13,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:13,476 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:13,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:13,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:13,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:13,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:13" (1/1) ... [2023-11-19 08:03:13,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd01cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:13, skipping insertion in model container [2023-11-19 08:03:13,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:13" (1/1) ... [2023-11-19 08:03:13,570 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:13,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:14,037 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:14,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:14,192 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:14,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14 WrapperNode [2023-11-19 08:03:14,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:14,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:14,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:14,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:14,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,262 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-19 08:03:14,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:14,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:14,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:14,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:14,279 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,312 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:14,313 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:14,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:14,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:14,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (1/1) ... [2023-11-19 08:03:14,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:14,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:14,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:14,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 08:03:14,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 08:03:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:14,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:14,412 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:14,642 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:14,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:14,913 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:14,923 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:14,923 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:03:14,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:14 BoogieIcfgContainer [2023-11-19 08:03:14,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:14,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:14,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:14,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:14,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:13" (1/3) ... [2023-11-19 08:03:14,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71da19b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:14, skipping insertion in model container [2023-11-19 08:03:14,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:14" (2/3) ... [2023-11-19 08:03:14,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71da19b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:14, skipping insertion in model container [2023-11-19 08:03:14,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:14" (3/3) ... [2023-11-19 08:03:14,937 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym-pthread.i [2023-11-19 08:03:14,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:14,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 08:03:14,960 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:03:15,034 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:03:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 96 transitions, 196 flow [2023-11-19 08:03:15,157 INFO L124 PetriNetUnfolderBase]: 8/112 cut-off events. [2023-11-19 08:03:15,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:15,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 112 events. 8/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-19 08:03:15,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 96 transitions, 196 flow [2023-11-19 08:03:15,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 96 transitions, 196 flow [2023-11-19 08:03:15,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:15,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 96 transitions, 196 flow [2023-11-19 08:03:15,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 96 transitions, 196 flow [2023-11-19 08:03:15,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 96 transitions, 196 flow [2023-11-19 08:03:15,223 INFO L124 PetriNetUnfolderBase]: 8/112 cut-off events. [2023-11-19 08:03:15,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:15,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 112 events. 8/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-19 08:03:15,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 1900 [2023-11-19 08:03:19,347 INFO L134 LiptonReduction]: Checked pairs total: 1948 [2023-11-19 08:03:19,348 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-11-19 08:03:19,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:19,371 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;@6c7f3533, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:19,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-19 08:03:19,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:03:19,375 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 08:03:19,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:19,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:19,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:19,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:03:19,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 13177, now seen corresponding path program 1 times [2023-11-19 08:03:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:19,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835068370] [2023-11-19 08:03:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:19,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835068370] [2023-11-19 08:03:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835068370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:19,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:19,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41974259] [2023-11-19 08:03:19,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:19,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:19,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:19,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:19,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 203 [2023-11-19 08:03:19,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 203 [2023-11-19 08:03:19,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:19,871 INFO L124 PetriNetUnfolderBase]: 16/40 cut-off events. [2023-11-19 08:03:19,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 40 events. 16/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 94 event pairs, 12 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 70. Up to 39 conditions per place. [2023-11-19 08:03:19,873 INFO L140 encePairwiseOnDemand]: 198/203 looper letters, 9 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-11-19 08:03:19,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 11 transitions, 46 flow [2023-11-19 08:03:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-11-19 08:03:19,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220032840722496 [2023-11-19 08:03:19,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-11-19 08:03:19,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-11-19 08:03:19,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:19,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-11-19 08:03:19,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:19,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:19,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:19,926 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 34 flow. Second operand 3 states and 257 transitions. [2023-11-19 08:03:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 11 transitions, 46 flow [2023-11-19 08:03:19,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:03:19,931 INFO L231 Difference]: Finished difference. Result has 15 places, 11 transitions, 28 flow [2023-11-19 08:03:19,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=15, PETRI_TRANSITIONS=11} [2023-11-19 08:03:19,938 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -2 predicate places. [2023-11-19 08:03:19,939 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 11 transitions, 28 flow [2023-11-19 08:03:19,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:19,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:03:19,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:03:19,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash 13179, now seen corresponding path program 1 times [2023-11-19 08:03:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:19,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513650572] [2023-11-19 08:03:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513650572] [2023-11-19 08:03:20,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513650572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:20,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:20,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074995081] [2023-11-19 08:03:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:20,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:20,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:20,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 203 [2023-11-19 08:03:20,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 11 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:20,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 203 [2023-11-19 08:03:20,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:20,223 INFO L124 PetriNetUnfolderBase]: 11/29 cut-off events. [2023-11-19 08:03:20,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:20,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 29 events. 11/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 57 event pairs, 8 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 57. Up to 28 conditions per place. [2023-11-19 08:03:20,226 INFO L140 encePairwiseOnDemand]: 201/203 looper letters, 8 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-11-19 08:03:20,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 44 flow [2023-11-19 08:03:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-19 08:03:20,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2023-11-19 08:03:20,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-19 08:03:20,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-19 08:03:20,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:20,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-19 08:03:20,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,240 INFO L175 Difference]: Start difference. First operand has 15 places, 11 transitions, 28 flow. Second operand 3 states and 259 transitions. [2023-11-19 08:03:20,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 44 flow [2023-11-19 08:03:20,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:20,241 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 27 flow [2023-11-19 08:03:20,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=25, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2023-11-19 08:03:20,243 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -2 predicate places. [2023-11-19 08:03:20,244 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 27 flow [2023-11-19 08:03:20,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:20,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:20,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:03:20,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:03:20,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:20,253 INFO L85 PathProgramCache]: Analyzing trace with hash 392864184, now seen corresponding path program 1 times [2023-11-19 08:03:20,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:20,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190234558] [2023-11-19 08:03:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190234558] [2023-11-19 08:03:20,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190234558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:20,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339336425] [2023-11-19 08:03:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:20,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:20,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:20,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 203 [2023-11-19 08:03:20,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 10 transitions, 27 flow. Second operand has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:20,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 203 [2023-11-19 08:03:20,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:20,828 INFO L124 PetriNetUnfolderBase]: 15/39 cut-off events. [2023-11-19 08:03:20,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:20,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 39 events. 15/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 88 event pairs, 8 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 77. Up to 28 conditions per place. [2023-11-19 08:03:20,830 INFO L140 encePairwiseOnDemand]: 198/203 looper letters, 10 selfloop transitions, 3 changer transitions 0/14 dead transitions. [2023-11-19 08:03:20,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 14 transitions, 61 flow [2023-11-19 08:03:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:03:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2023-11-19 08:03:20,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-11-19 08:03:20,834 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 319 transitions. [2023-11-19 08:03:20,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 319 transitions. [2023-11-19 08:03:20,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:20,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 319 transitions. [2023-11-19 08:03:20,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,843 INFO L175 Difference]: Start difference. First operand has 15 places, 10 transitions, 27 flow. Second operand 4 states and 319 transitions. [2023-11-19 08:03:20,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 14 transitions, 61 flow [2023-11-19 08:03:20,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 14 transitions, 60 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:20,845 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 42 flow [2023-11-19 08:03:20,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2023-11-19 08:03:20,847 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-11-19 08:03:20,852 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 42 flow [2023-11-19 08:03:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:20,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:20,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:20,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:03:20,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:03:20,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash 392864183, now seen corresponding path program 1 times [2023-11-19 08:03:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:20,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149675192] [2023-11-19 08:03:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:21,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149675192] [2023-11-19 08:03:21,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149675192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:21,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:21,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125787487] [2023-11-19 08:03:21,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:21,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:21,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 203 [2023-11-19 08:03:21,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:21,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:21,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 203 [2023-11-19 08:03:21,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:21,164 INFO L124 PetriNetUnfolderBase]: 11/30 cut-off events. [2023-11-19 08:03:21,164 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-19 08:03:21,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 30 events. 11/30 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 56 event pairs, 8 based on Foata normal form. 6/30 useless extension candidates. Maximal degree in co-relation 76. Up to 28 conditions per place. [2023-11-19 08:03:21,165 INFO L140 encePairwiseOnDemand]: 201/203 looper letters, 8 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-11-19 08:03:21,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 58 flow [2023-11-19 08:03:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-19 08:03:21,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2023-11-19 08:03:21,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-19 08:03:21,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-19 08:03:21,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:21,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-19 08:03:21,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:21,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:21,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:21,173 INFO L175 Difference]: Start difference. First operand has 18 places, 11 transitions, 42 flow. Second operand 3 states and 243 transitions. [2023-11-19 08:03:21,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 58 flow [2023-11-19 08:03:21,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 10 transitions, 52 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:21,175 INFO L231 Difference]: Finished difference. Result has 17 places, 10 transitions, 36 flow [2023-11-19 08:03:21,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=17, PETRI_TRANSITIONS=10} [2023-11-19 08:03:21,176 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2023-11-19 08:03:21,176 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 10 transitions, 36 flow [2023-11-19 08:03:21,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:21,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:21,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:03:21,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:03:21,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-19 08:03:21,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash -706177349, now seen corresponding path program 1 times [2023-11-19 08:03:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317617799] [2023-11-19 08:03:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:03:21,194 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:03:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:03:21,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:03:21,225 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:03:21,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-19 08:03:21,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-19 08:03:21,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-19 08:03:21,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-11-19 08:03:21,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-19 08:03:21,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-19 08:03:21,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-19 08:03:21,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-11-19 08:03:21,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-19 08:03:21,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-19 08:03:21,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:03:21,233 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 08:03:21,237 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:03:21,237 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:03:21,273 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:03:21,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 147 transitions, 304 flow [2023-11-19 08:03:21,321 INFO L124 PetriNetUnfolderBase]: 15/181 cut-off events. [2023-11-19 08:03:21,321 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:21,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 379 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-11-19 08:03:21,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 147 transitions, 304 flow [2023-11-19 08:03:21,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 147 transitions, 304 flow [2023-11-19 08:03:21,327 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:21,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 147 transitions, 304 flow [2023-11-19 08:03:21,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 147 transitions, 304 flow [2023-11-19 08:03:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 147 transitions, 304 flow [2023-11-19 08:03:21,355 INFO L124 PetriNetUnfolderBase]: 15/181 cut-off events. [2023-11-19 08:03:21,355 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:21,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 379 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-11-19 08:03:21,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 8900 [2023-11-19 08:03:24,873 INFO L134 LiptonReduction]: Checked pairs total: 13406 [2023-11-19 08:03:24,874 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-19 08:03:24,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:24,878 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;@6c7f3533, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:24,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-19 08:03:24,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:03:24,880 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:03:24,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:24,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:24,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:24,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:24,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash 24276, now seen corresponding path program 1 times [2023-11-19 08:03:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:24,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314867893] [2023-11-19 08:03:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:24,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:24,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:24,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314867893] [2023-11-19 08:03:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314867893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:24,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:24,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:24,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679358907] [2023-11-19 08:03:24,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:24,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:03:24,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:03:24,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:03:24,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 297 [2023-11-19 08:03:24,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 134.0) internal successors, (268), 2 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:24,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:24,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 297 [2023-11-19 08:03:24,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:25,087 INFO L124 PetriNetUnfolderBase]: 649/1164 cut-off events. [2023-11-19 08:03:25,087 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-19 08:03:25,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165 conditions, 1164 events. 649/1164 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7150 event pairs, 525 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 778. Up to 966 conditions per place. [2023-11-19 08:03:25,099 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 24 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2023-11-19 08:03:25,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 124 flow [2023-11-19 08:03:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:03:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:03:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 292 transitions. [2023-11-19 08:03:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49158249158249157 [2023-11-19 08:03:25,102 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 292 transitions. [2023-11-19 08:03:25,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 292 transitions. [2023-11-19 08:03:25,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:25,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 292 transitions. [2023-11-19 08:03:25,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.0) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,107 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,107 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 80 flow. Second operand 2 states and 292 transitions. [2023-11-19 08:03:25,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 124 flow [2023-11-19 08:03:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:03:25,109 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 76 flow [2023-11-19 08:03:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-11-19 08:03:25,111 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-19 08:03:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 76 flow [2023-11-19 08:03:25,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 134.0) internal successors, (268), 2 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:25,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:25,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:03:25,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:25,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash 24288, now seen corresponding path program 1 times [2023-11-19 08:03:25,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:25,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556809534] [2023-11-19 08:03:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:25,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:25,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556809534] [2023-11-19 08:03:25,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556809534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:25,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:25,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:25,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909435615] [2023-11-19 08:03:25,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:25,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:25,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:25,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:25,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 297 [2023-11-19 08:03:25,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:25,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 297 [2023-11-19 08:03:25,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:25,323 INFO L124 PetriNetUnfolderBase]: 467/859 cut-off events. [2023-11-19 08:03:25,323 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-19 08:03:25,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 859 events. 467/859 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4974 event pairs, 374 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 1595. Up to 704 conditions per place. [2023-11-19 08:03:25,333 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 22 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-19 08:03:25,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 120 flow [2023-11-19 08:03:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-11-19 08:03:25,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511784511784512 [2023-11-19 08:03:25,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-11-19 08:03:25,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-11-19 08:03:25,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:25,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-11-19 08:03:25,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,344 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 76 flow. Second operand 3 states and 402 transitions. [2023-11-19 08:03:25,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 120 flow [2023-11-19 08:03:25,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:03:25,351 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 76 flow [2023-11-19 08:03:25,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-19 08:03:25,353 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-11-19 08:03:25,357 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 76 flow [2023-11-19 08:03:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:25,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:25,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:03:25,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:25,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash 24289, now seen corresponding path program 1 times [2023-11-19 08:03:25,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291097088] [2023-11-19 08:03:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:25,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291097088] [2023-11-19 08:03:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291097088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334662512] [2023-11-19 08:03:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:25,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:25,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 297 [2023-11-19 08:03:25,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:25,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 297 [2023-11-19 08:03:25,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:25,588 INFO L124 PetriNetUnfolderBase]: 285/554 cut-off events. [2023-11-19 08:03:25,589 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-19 08:03:25,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 554 events. 285/554 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2915 event pairs, 223 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 1030. Up to 443 conditions per place. [2023-11-19 08:03:25,595 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-19 08:03:25,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 118 flow [2023-11-19 08:03:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-11-19 08:03:25,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2023-11-19 08:03:25,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-11-19 08:03:25,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-11-19 08:03:25,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:25,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-11-19 08:03:25,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,606 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 407 transitions. [2023-11-19 08:03:25,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 118 flow [2023-11-19 08:03:25,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:25,608 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 75 flow [2023-11-19 08:03:25,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 08:03:25,609 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-11-19 08:03:25,609 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 75 flow [2023-11-19 08:03:25,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:25,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:25,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:03:25,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:25,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash 724115642, now seen corresponding path program 1 times [2023-11-19 08:03:25,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:25,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754991889] [2023-11-19 08:03:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:25,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:25,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754991889] [2023-11-19 08:03:25,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754991889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:25,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:25,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:25,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264648044] [2023-11-19 08:03:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:25,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:25,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:25,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-11-19 08:03:25,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:25,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-11-19 08:03:25,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:25,891 INFO L124 PetriNetUnfolderBase]: 230/454 cut-off events. [2023-11-19 08:03:25,891 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-19 08:03:25,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 454 events. 230/454 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2249 event pairs, 174 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 839. Up to 354 conditions per place. [2023-11-19 08:03:25,896 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 19 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-19 08:03:25,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 111 flow [2023-11-19 08:03:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-19 08:03:25,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-11-19 08:03:25,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-19 08:03:25,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-19 08:03:25,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:25,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-19 08:03:25,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,905 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 75 flow. Second operand 3 states and 385 transitions. [2023-11-19 08:03:25,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 111 flow [2023-11-19 08:03:25,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:25,907 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 72 flow [2023-11-19 08:03:25,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-19 08:03:25,908 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-19 08:03:25,908 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 72 flow [2023-11-19 08:03:25,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:25,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:03:25,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:25,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:25,910 INFO L85 PathProgramCache]: Analyzing trace with hash 724115643, now seen corresponding path program 1 times [2023-11-19 08:03:25,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:25,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835902803] [2023-11-19 08:03:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:25,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:26,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835902803] [2023-11-19 08:03:26,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835902803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:26,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:26,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594164045] [2023-11-19 08:03:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:26,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-11-19 08:03:26,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:26,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:26,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-11-19 08:03:26,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:26,360 INFO L124 PetriNetUnfolderBase]: 382/676 cut-off events. [2023-11-19 08:03:26,360 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-19 08:03:26,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 676 events. 382/676 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3532 event pairs, 174 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 1314. Up to 354 conditions per place. [2023-11-19 08:03:26,366 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 32 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-11-19 08:03:26,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 177 flow [2023-11-19 08:03:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:03:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-11-19 08:03:26,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385521885521885 [2023-11-19 08:03:26,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-11-19 08:03:26,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-11-19 08:03:26,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:26,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-11-19 08:03:26,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:26,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:26,376 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:26,376 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 72 flow. Second operand 4 states and 521 transitions. [2023-11-19 08:03:26,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 177 flow [2023-11-19 08:03:26,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:26,379 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 87 flow [2023-11-19 08:03:26,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-11-19 08:03:26,380 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-19 08:03:26,380 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 87 flow [2023-11-19 08:03:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:26,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:26,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:03:26,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:26,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1193557324, now seen corresponding path program 1 times [2023-11-19 08:03:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:26,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733420231] [2023-11-19 08:03:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:26,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:03:26,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733420231] [2023-11-19 08:03:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733420231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676359592] [2023-11-19 08:03:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:26,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:26,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:26,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:26,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:03:26,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:26,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:26,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676359592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:26,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:26,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-19 08:03:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126775453] [2023-11-19 08:03:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:27,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 297 [2023-11-19 08:03:27,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:27,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 297 [2023-11-19 08:03:27,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:27,235 INFO L124 PetriNetUnfolderBase]: 624/1188 cut-off events. [2023-11-19 08:03:27,235 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2023-11-19 08:03:27,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2308 conditions, 1188 events. 624/1188 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6739 event pairs, 300 based on Foata normal form. 0/903 useless extension candidates. Maximal degree in co-relation 2301. Up to 618 conditions per place. [2023-11-19 08:03:27,247 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 33 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-19 08:03:27,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 205 flow [2023-11-19 08:03:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:03:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-11-19 08:03:27,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-19 08:03:27,251 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-11-19 08:03:27,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-11-19 08:03:27,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:27,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-11-19 08:03:27,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,258 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,258 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 87 flow. Second operand 4 states and 540 transitions. [2023-11-19 08:03:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 205 flow [2023-11-19 08:03:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:27,260 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 104 flow [2023-11-19 08:03:27,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-11-19 08:03:27,261 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-19 08:03:27,262 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 104 flow [2023-11-19 08:03:27,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:27,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:27,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:03:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:03:27,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:27,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1023362555, now seen corresponding path program 1 times [2023-11-19 08:03:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:27,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79926573] [2023-11-19 08:03:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:27,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:27,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:27,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79926573] [2023-11-19 08:03:27,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79926573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:27,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:27,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162812087] [2023-11-19 08:03:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:27,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:27,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:27,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 297 [2023-11-19 08:03:27,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:27,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 297 [2023-11-19 08:03:27,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:27,761 INFO L124 PetriNetUnfolderBase]: 833/1469 cut-off events. [2023-11-19 08:03:27,761 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-11-19 08:03:27,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1469 events. 833/1469 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8209 event pairs, 356 based on Foata normal form. 48/1327 useless extension candidates. Maximal degree in co-relation 3285. Up to 825 conditions per place. [2023-11-19 08:03:27,775 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 36 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2023-11-19 08:03:27,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 254 flow [2023-11-19 08:03:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-11-19 08:03:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45342312008978675 [2023-11-19 08:03:27,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-11-19 08:03:27,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-11-19 08:03:27,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:27,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-11-19 08:03:27,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,784 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 104 flow. Second operand 3 states and 404 transitions. [2023-11-19 08:03:27,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 254 flow [2023-11-19 08:03:27,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:27,788 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 155 flow [2023-11-19 08:03:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-19 08:03:27,790 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-11-19 08:03:27,790 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 155 flow [2023-11-19 08:03:27,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:27,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:27,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:03:27,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:27,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:27,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1659470028, now seen corresponding path program 1 times [2023-11-19 08:03:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:27,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413078205] [2023-11-19 08:03:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:28,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413078205] [2023-11-19 08:03:28,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413078205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207944811] [2023-11-19 08:03:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:28,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:28,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:28,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:28,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:03:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:28,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:03:28,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:28,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:28,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:28,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207944811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:28,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:28,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-19 08:03:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32796252] [2023-11-19 08:03:28,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:28,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:03:28,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:03:28,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:03:29,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 297 [2023-11-19 08:03:29,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 155 flow. Second operand has 13 states, 13 states have (on average 120.07692307692308) internal successors, (1561), 13 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:29,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 297 [2023-11-19 08:03:29,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:29,848 INFO L124 PetriNetUnfolderBase]: 1242/2071 cut-off events. [2023-11-19 08:03:29,848 INFO L125 PetriNetUnfolderBase]: For 1429/1477 co-relation queries the response was YES. [2023-11-19 08:03:29,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5481 conditions, 2071 events. 1242/2071 cut-off events. For 1429/1477 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11602 event pairs, 201 based on Foata normal form. 50/1971 useless extension candidates. Maximal degree in co-relation 5472. Up to 533 conditions per place. [2023-11-19 08:03:29,873 INFO L140 encePairwiseOnDemand]: 291/297 looper letters, 64 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2023-11-19 08:03:29,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 492 flow [2023-11-19 08:03:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:03:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:03:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 769 transitions. [2023-11-19 08:03:29,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43153759820426485 [2023-11-19 08:03:29,878 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 769 transitions. [2023-11-19 08:03:29,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 769 transitions. [2023-11-19 08:03:29,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:29,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 769 transitions. [2023-11-19 08:03:29,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.16666666666666) internal successors, (769), 6 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,886 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 155 flow. Second operand 6 states and 769 transitions. [2023-11-19 08:03:29,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 85 transitions, 492 flow [2023-11-19 08:03:29,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 85 transitions, 468 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:29,895 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 212 flow [2023-11-19 08:03:29,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-19 08:03:29,896 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2023-11-19 08:03:29,896 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 212 flow [2023-11-19 08:03:29,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.07692307692308) internal successors, (1561), 13 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:29,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:03:29,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:30,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:03:30,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-19 08:03:30,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash 243656970, now seen corresponding path program 1 times [2023-11-19 08:03:30,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:30,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407197790] [2023-11-19 08:03:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:03:30,131 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:03:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:03:30,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:03:30,148 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:03:30,152 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-19 08:03:30,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-19 08:03:30,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-19 08:03:30,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-19 08:03:30,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-19 08:03:30,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-19 08:03:30,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-11-19 08:03:30,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-19 08:03:30,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-19 08:03:30,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-11-19 08:03:30,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-19 08:03:30,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-19 08:03:30,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-19 08:03:30,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:03:30,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:30,156 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:03:30,156 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:03:30,208 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:03:30,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 198 transitions, 414 flow [2023-11-19 08:03:30,259 INFO L124 PetriNetUnfolderBase]: 22/250 cut-off events. [2023-11-19 08:03:30,259 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:03:30,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 250 events. 22/250 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 185. Up to 8 conditions per place. [2023-11-19 08:03:30,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 198 transitions, 414 flow [2023-11-19 08:03:30,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 198 transitions, 414 flow [2023-11-19 08:03:30,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:30,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 198 transitions, 414 flow [2023-11-19 08:03:30,266 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 198 transitions, 414 flow [2023-11-19 08:03:30,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 198 transitions, 414 flow [2023-11-19 08:03:30,307 INFO L124 PetriNetUnfolderBase]: 22/250 cut-off events. [2023-11-19 08:03:30,308 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:03:30,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 250 events. 22/250 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 185. Up to 8 conditions per place. [2023-11-19 08:03:30,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 21000 [2023-11-19 08:03:34,329 INFO L134 LiptonReduction]: Checked pairs total: 32160 [2023-11-19 08:03:34,329 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-11-19 08:03:34,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:34,332 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;@6c7f3533, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:34,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-19 08:03:34,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:03:34,337 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:03:34,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:34,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:34,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:34,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:34,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:34,338 INFO L85 PathProgramCache]: Analyzing trace with hash 38880, now seen corresponding path program 1 times [2023-11-19 08:03:34,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:34,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186103138] [2023-11-19 08:03:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:34,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:34,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:34,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186103138] [2023-11-19 08:03:34,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186103138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:34,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:34,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:34,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714149834] [2023-11-19 08:03:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:34,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:03:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:34,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:03:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:03:34,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 405 [2023-11-19 08:03:34,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:34,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:34,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 405 [2023-11-19 08:03:34,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:36,395 INFO L124 PetriNetUnfolderBase]: 12329/17487 cut-off events. [2023-11-19 08:03:36,396 INFO L125 PetriNetUnfolderBase]: For 817/817 co-relation queries the response was YES. [2023-11-19 08:03:36,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34209 conditions, 17487 events. 12329/17487 cut-off events. For 817/817 co-relation queries the response was YES. Maximal size of possible extension queue 1437. Compared 115611 event pairs, 10557 based on Foata normal form. 0/8697 useless extension candidates. Maximal degree in co-relation 2532. Up to 16286 conditions per place. [2023-11-19 08:03:36,553 INFO L140 encePairwiseOnDemand]: 403/405 looper letters, 37 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-11-19 08:03:36,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 184 flow [2023-11-19 08:03:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:03:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:03:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 395 transitions. [2023-11-19 08:03:36,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2023-11-19 08:03:36,556 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 395 transitions. [2023-11-19 08:03:36,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 395 transitions. [2023-11-19 08:03:36,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:36,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 395 transitions. [2023-11-19 08:03:36,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:36,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 405.0) internal successors, (1215), 3 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:36,561 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 405.0) internal successors, (1215), 3 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:36,561 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 114 flow. Second operand 2 states and 395 transitions. [2023-11-19 08:03:36,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 184 flow [2023-11-19 08:03:36,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 182 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:03:36,565 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 108 flow [2023-11-19 08:03:36,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=108, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-19 08:03:36,567 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-11-19 08:03:36,567 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 108 flow [2023-11-19 08:03:36,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:36,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:36,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:03:36,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:36,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 38901, now seen corresponding path program 1 times [2023-11-19 08:03:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246648118] [2023-11-19 08:03:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:36,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:36,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246648118] [2023-11-19 08:03:36,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246648118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:36,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:36,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:36,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173987901] [2023-11-19 08:03:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:36,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:36,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:36,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:36,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 405 [2023-11-19 08:03:36,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:36,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:36,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 405 [2023-11-19 08:03:36,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:38,363 INFO L124 PetriNetUnfolderBase]: 8997/12922 cut-off events. [2023-11-19 08:03:38,363 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-11-19 08:03:38,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25224 conditions, 12922 events. 8997/12922 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 82897 event pairs, 7668 based on Foata normal form. 0/6859 useless extension candidates. Maximal degree in co-relation 25218. Up to 11964 conditions per place. [2023-11-19 08:03:38,467 INFO L140 encePairwiseOnDemand]: 403/405 looper letters, 35 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-19 08:03:38,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 178 flow [2023-11-19 08:03:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-11-19 08:03:38,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45267489711934156 [2023-11-19 08:03:38,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-11-19 08:03:38,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-11-19 08:03:38,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:38,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-11-19 08:03:38,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:38,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:38,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:38,478 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 108 flow. Second operand 3 states and 550 transitions. [2023-11-19 08:03:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 178 flow [2023-11-19 08:03:38,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:03:38,481 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 108 flow [2023-11-19 08:03:38,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-19 08:03:38,483 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-11-19 08:03:38,483 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 108 flow [2023-11-19 08:03:38,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:38,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:38,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:03:38,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:03:38,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:38,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 38902, now seen corresponding path program 1 times [2023-11-19 08:03:38,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:38,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583384749] [2023-11-19 08:03:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:38,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583384749] [2023-11-19 08:03:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583384749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:38,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404378861] [2023-11-19 08:03:38,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:38,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:38,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 405 [2023-11-19 08:03:38,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:38,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:38,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 405 [2023-11-19 08:03:38,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:39,581 INFO L124 PetriNetUnfolderBase]: 5665/8357 cut-off events. [2023-11-19 08:03:39,581 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-11-19 08:03:39,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16340 conditions, 8357 events. 5665/8357 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 51102 event pairs, 4779 based on Foata normal form. 0/5021 useless extension candidates. Maximal degree in co-relation 16333. Up to 7643 conditions per place. [2023-11-19 08:03:39,647 INFO L140 encePairwiseOnDemand]: 403/405 looper letters, 34 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-19 08:03:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 176 flow [2023-11-19 08:03:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-11-19 08:03:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2023-11-19 08:03:39,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-11-19 08:03:39,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-11-19 08:03:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:39,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-11-19 08:03:39,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:39,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:39,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:39,657 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 108 flow. Second operand 3 states and 555 transitions. [2023-11-19 08:03:39,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 176 flow [2023-11-19 08:03:39,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:39,663 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 107 flow [2023-11-19 08:03:39,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-11-19 08:03:39,664 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-11-19 08:03:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 107 flow [2023-11-19 08:03:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:39,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:39,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:39,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 08:03:39,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:39,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1159848491, now seen corresponding path program 1 times [2023-11-19 08:03:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:39,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13456361] [2023-11-19 08:03:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:39,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13456361] [2023-11-19 08:03:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13456361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:39,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008757550] [2023-11-19 08:03:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:39,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 405 [2023-11-19 08:03:39,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:39,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:39,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 405 [2023-11-19 08:03:39,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:40,654 INFO L124 PetriNetUnfolderBase]: 4190/6208 cut-off events. [2023-11-19 08:03:40,654 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2023-11-19 08:03:40,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12117 conditions, 6208 events. 4190/6208 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36243 event pairs, 3464 based on Foata normal form. 0/4008 useless extension candidates. Maximal degree in co-relation 12110. Up to 5628 conditions per place. [2023-11-19 08:03:40,714 INFO L140 encePairwiseOnDemand]: 401/405 looper letters, 31 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-19 08:03:40,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 165 flow [2023-11-19 08:03:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-11-19 08:03:40,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337448559670782 [2023-11-19 08:03:40,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-11-19 08:03:40,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-11-19 08:03:40,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:40,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-11-19 08:03:40,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,726 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 107 flow. Second operand 3 states and 527 transitions. [2023-11-19 08:03:40,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 165 flow [2023-11-19 08:03:40,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:40,729 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 102 flow [2023-11-19 08:03:40,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-19 08:03:40,730 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-19 08:03:40,730 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 102 flow [2023-11-19 08:03:40,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:40,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:40,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 08:03:40,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:40,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1159848492, now seen corresponding path program 1 times [2023-11-19 08:03:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:40,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322231618] [2023-11-19 08:03:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:40,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322231618] [2023-11-19 08:03:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322231618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:40,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456980445] [2023-11-19 08:03:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:40,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:40,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:40,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:41,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 405 [2023-11-19 08:03:41,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:41,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:41,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 405 [2023-11-19 08:03:41,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:42,065 INFO L124 PetriNetUnfolderBase]: 7048/10278 cut-off events. [2023-11-19 08:03:42,065 INFO L125 PetriNetUnfolderBase]: For 534/534 co-relation queries the response was YES. [2023-11-19 08:03:42,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20118 conditions, 10278 events. 7048/10278 cut-off events. For 534/534 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 63828 event pairs, 3352 based on Foata normal form. 0/6824 useless extension candidates. Maximal degree in co-relation 20111. Up to 5628 conditions per place. [2023-11-19 08:03:42,157 INFO L140 encePairwiseOnDemand]: 400/405 looper letters, 56 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-19 08:03:42,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 284 flow [2023-11-19 08:03:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:03:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 725 transitions. [2023-11-19 08:03:42,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44753086419753085 [2023-11-19 08:03:42,161 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 725 transitions. [2023-11-19 08:03:42,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 725 transitions. [2023-11-19 08:03:42,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:42,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 725 transitions. [2023-11-19 08:03:42,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:42,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:42,170 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:42,170 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 102 flow. Second operand 4 states and 725 transitions. [2023-11-19 08:03:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 284 flow [2023-11-19 08:03:42,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 68 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:42,174 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 117 flow [2023-11-19 08:03:42,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-19 08:03:42,175 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-11-19 08:03:42,176 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 117 flow [2023-11-19 08:03:42,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:42,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:42,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 08:03:42,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:42,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1822823955, now seen corresponding path program 1 times [2023-11-19 08:03:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887539079] [2023-11-19 08:03:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:03:42,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887539079] [2023-11-19 08:03:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887539079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168240305] [2023-11-19 08:03:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:42,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:42,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:42,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:03:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:42,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:03:42,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:42,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:42,613 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168240305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:42,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-19 08:03:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124553031] [2023-11-19 08:03:42,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:42,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 405 [2023-11-19 08:03:42,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:42,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:42,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 405 [2023-11-19 08:03:42,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:44,232 INFO L124 PetriNetUnfolderBase]: 12114/17549 cut-off events. [2023-11-19 08:03:44,232 INFO L125 PetriNetUnfolderBase]: For 2651/2651 co-relation queries the response was YES. [2023-11-19 08:03:44,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35983 conditions, 17549 events. 12114/17549 cut-off events. For 2651/2651 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 113964 event pairs, 5894 based on Foata normal form. 0/12634 useless extension candidates. Maximal degree in co-relation 35975. Up to 9678 conditions per place. [2023-11-19 08:03:44,380 INFO L140 encePairwiseOnDemand]: 400/405 looper letters, 57 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-19 08:03:44,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 312 flow [2023-11-19 08:03:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:03:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-11-19 08:03:44,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2023-11-19 08:03:44,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-11-19 08:03:44,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-11-19 08:03:44,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:44,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-11-19 08:03:44,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:44,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:44,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:44,394 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 117 flow. Second operand 4 states and 744 transitions. [2023-11-19 08:03:44,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 312 flow [2023-11-19 08:03:44,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:44,398 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 134 flow [2023-11-19 08:03:44,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-11-19 08:03:44,399 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-19 08:03:44,399 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 134 flow [2023-11-19 08:03:44,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:44,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:44,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:44,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:44,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:44,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1102379067, now seen corresponding path program 1 times [2023-11-19 08:03:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:44,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499555906] [2023-11-19 08:03:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:44,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:44,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499555906] [2023-11-19 08:03:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499555906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:44,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:44,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030304228] [2023-11-19 08:03:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:44,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:44,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 405 [2023-11-19 08:03:44,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:44,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:44,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 405 [2023-11-19 08:03:44,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:47,131 INFO L124 PetriNetUnfolderBase]: 17040/24140 cut-off events. [2023-11-19 08:03:47,131 INFO L125 PetriNetUnfolderBase]: For 5305/5305 co-relation queries the response was YES. [2023-11-19 08:03:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53663 conditions, 24140 events. 17040/24140 cut-off events. For 5305/5305 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 155355 event pairs, 8637 based on Foata normal form. 604/19804 useless extension candidates. Maximal degree in co-relation 53654. Up to 16168 conditions per place. [2023-11-19 08:03:47,332 INFO L140 encePairwiseOnDemand]: 397/405 looper letters, 61 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2023-11-19 08:03:47,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 367 flow [2023-11-19 08:03:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-11-19 08:03:47,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46255144032921813 [2023-11-19 08:03:47,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-11-19 08:03:47,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-11-19 08:03:47,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:47,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-11-19 08:03:47,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,344 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 134 flow. Second operand 3 states and 562 transitions. [2023-11-19 08:03:47,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 367 flow [2023-11-19 08:03:47,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:47,350 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 193 flow [2023-11-19 08:03:47,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-19 08:03:47,351 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-11-19 08:03:47,351 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 193 flow [2023-11-19 08:03:47,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:47,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:47,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-19 08:03:47,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:47,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash -185985168, now seen corresponding path program 1 times [2023-11-19 08:03:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:47,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105190541] [2023-11-19 08:03:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105190541] [2023-11-19 08:03:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105190541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573325428] [2023-11-19 08:03:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:47,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:47,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:03:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:47,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:03:47,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:47,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:48,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573325428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:48,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:48,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-19 08:03:48,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323087088] [2023-11-19 08:03:48,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:03:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:03:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:03:48,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 405 [2023-11-19 08:03:48,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 165.07692307692307) internal successors, (2146), 13 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:48,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 405 [2023-11-19 08:03:48,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:52,570 INFO L124 PetriNetUnfolderBase]: 24072/33987 cut-off events. [2023-11-19 08:03:52,570 INFO L125 PetriNetUnfolderBase]: For 18547/18757 co-relation queries the response was YES. [2023-11-19 08:03:52,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85384 conditions, 33987 events. 24072/33987 cut-off events. For 18547/18757 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 225169 event pairs, 4336 based on Foata normal form. 560/29157 useless extension candidates. Maximal degree in co-relation 85374. Up to 9168 conditions per place. [2023-11-19 08:03:52,878 INFO L140 encePairwiseOnDemand]: 399/405 looper letters, 112 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2023-11-19 08:03:52,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 134 transitions, 713 flow [2023-11-19 08:03:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:03:52,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:03:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-11-19 08:03:52,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473251028806584 [2023-11-19 08:03:52,885 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-11-19 08:03:52,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-11-19 08:03:52,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:52,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-11-19 08:03:52,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:52,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:52,898 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:52,901 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 193 flow. Second operand 6 states and 1087 transitions. [2023-11-19 08:03:52,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 134 transitions, 713 flow [2023-11-19 08:03:53,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 134 transitions, 687 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:03:53,104 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 248 flow [2023-11-19 08:03:53,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-11-19 08:03:53,105 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-11-19 08:03:53,105 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 248 flow [2023-11-19 08:03:53,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.07692307692307) internal successors, (2146), 13 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:53,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:53,107 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:53,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:53,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:53,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-19 08:03:53,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1854603978, now seen corresponding path program 1 times [2023-11-19 08:03:53,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:53,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729207424] [2023-11-19 08:03:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:53,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:03:53,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729207424] [2023-11-19 08:03:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729207424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056402554] [2023-11-19 08:03:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:53,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:53,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:53,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:53,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697b88dd-3764-4703-8f87-61f409ed966c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:03:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:53,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:03:53,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:03:53,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:03:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 08:03:53,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056402554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:53,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-19 08:03:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582542476] [2023-11-19 08:03:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:53,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:53,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 405 [2023-11-19 08:03:53,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:53,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:53,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 405 [2023-11-19 08:03:53,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand