./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/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_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/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_ea7d335a-2a4f-439e-a277-47721619cfc8/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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:06,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:06,442 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:50:06,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:06,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:06,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:06,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:06,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:06,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:06,503 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:06,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:06,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:06,506 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:06,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:06,508 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:06,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:06,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:06,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:06,511 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:50:06,511 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:50:06,512 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:50:06,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:06,513 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:50:06,514 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:50:06,514 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:06,515 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:06,516 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:06,516 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:06,517 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:06,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:06,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:06,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:06,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:06,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:06,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:06,520 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:06,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:06,521 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:06,521 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_ea7d335a-2a4f-439e-a277-47721619cfc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2023-11-19 07:50:06,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:06,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:06,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:06,938 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:06,939 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:06,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-19 07:50:10,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:10,374 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:10,377 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-19 07:50:10,403 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/data/5ff7c997b/8f723fe83bbb4b86a1004404210a32a1/FLAGe1ebf4959 [2023-11-19 07:50:10,424 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/data/5ff7c997b/8f723fe83bbb4b86a1004404210a32a1 [2023-11-19 07:50:10,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:10,436 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:10,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:10,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:10,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:10,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0f89f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:10, skipping insertion in model container [2023-11-19 07:50:10,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:10" (1/1) ... [2023-11-19 07:50:10,511 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:10,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:10,993 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:11,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:11,112 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:11,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11 WrapperNode [2023-11-19 07:50:11,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:11,115 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:11,115 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:11,115 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:11,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,165 INFO L138 Inliner]: procedures = 169, calls = 15, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 49 [2023-11-19 07:50:11,165 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:11,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:11,166 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:11,166 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:11,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,186 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,205 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:11,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:11,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:11,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:11,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (1/1) ... [2023-11-19 07:50:11,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:11,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:11,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7d335a-2a4f-439e-a277-47721619cfc8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:11,294 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:50:11,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:50:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:11,299 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 07:50:11,498 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:11,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:11,727 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:11,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:11,816 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:50:11,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:11 BoogieIcfgContainer [2023-11-19 07:50:11,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:11,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:11,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:11,833 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:11,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:10" (1/3) ... [2023-11-19 07:50:11,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae21452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:11, skipping insertion in model container [2023-11-19 07:50:11,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:11" (2/3) ... [2023-11-19 07:50:11,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae21452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:11, skipping insertion in model container [2023-11-19 07:50:11,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:11" (3/3) ... [2023-11-19 07:50:11,837 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-11-19 07:50:11,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:11,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 07:50:11,862 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:50:11,908 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:11,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 49 transitions, 102 flow [2023-11-19 07:50:11,989 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2023-11-19 07:50:11,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:11,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 4/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 35. Up to 4 conditions per place. [2023-11-19 07:50:11,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 49 transitions, 102 flow [2023-11-19 07:50:11,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 49 transitions, 102 flow [2023-11-19 07:50:12,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:12,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 49 transitions, 102 flow [2023-11-19 07:50:12,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 49 transitions, 102 flow [2023-11-19 07:50:12,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 49 transitions, 102 flow [2023-11-19 07:50:12,039 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2023-11-19 07:50:12,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:12,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 4/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 35. Up to 4 conditions per place. [2023-11-19 07:50:12,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 646 [2023-11-19 07:50:13,574 INFO L134 LiptonReduction]: Checked pairs total: 577 [2023-11-19 07:50:13,575 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-11-19 07:50:13,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:13,599 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;@b9fe8cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:13,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:50:13,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:13,602 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:13,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:13,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:13,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:13,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:50:13,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash 8303, now seen corresponding path program 1 times [2023-11-19 07:50:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476132762] [2023-11-19 07:50:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:13,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:13,880 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 07:50:13,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:13,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476132762] [2023-11-19 07:50:13,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476132762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:13,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:13,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405622857] [2023-11-19 07:50:13,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:13,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:13,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 102 [2023-11-19 07:50:13,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 26 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 07:50:13,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:13,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 102 [2023-11-19 07:50:13,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:14,003 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-19 07:50:14,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:14,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-11-19 07:50:14,006 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-11-19 07:50:14,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 30 flow [2023-11-19 07:50:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-19 07:50:14,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3660130718954248 [2023-11-19 07:50:14,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-19 07:50:14,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-19 07:50:14,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:14,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-19 07:50:14,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 07:50:14,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:50:14,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:50:14,047 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 26 flow. Second operand 3 states and 112 transitions. [2023-11-19 07:50:14,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 30 flow [2023-11-19 07:50:14,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:14,079 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 20 flow [2023-11-19 07:50:14,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-11-19 07:50:14,088 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-11-19 07:50:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 20 flow [2023-11-19 07:50:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 07:50:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:14,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:14,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:50:14,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 8305, now seen corresponding path program 1 times [2023-11-19 07:50:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315500248] [2023-11-19 07:50:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:14,287 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 07:50:14,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:14,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315500248] [2023-11-19 07:50:14,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315500248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:14,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099561771] [2023-11-19 07:50:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:14,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:14,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:14,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 102 [2023-11-19 07:50:14,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:50:14,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:14,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 102 [2023-11-19 07:50:14,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:14,335 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 07:50:14,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:14,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 21. Up to 10 conditions per place. [2023-11-19 07:50:14,336 INFO L140 encePairwiseOnDemand]: 100/102 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-11-19 07:50:14,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 28 flow [2023-11-19 07:50:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-19 07:50:14,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2023-11-19 07:50:14,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-19 07:50:14,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-19 07:50:14,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:14,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-19 07:50:14,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:14,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:50:14,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:50:14,342 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 20 flow. Second operand 3 states and 114 transitions. [2023-11-19 07:50:14,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 28 flow [2023-11-19 07:50:14,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:14,343 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 19 flow [2023-11-19 07:50:14,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=19, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-11-19 07:50:14,344 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-11-19 07:50:14,344 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 19 flow [2023-11-19 07:50:14,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:50:14,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:14,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:50:14,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:14,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:50:14,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -915460612, now seen corresponding path program 1 times [2023-11-19 07:50:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641771899] [2023-11-19 07:50:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:14,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:14,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:14,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:14,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:14,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:50:14,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-19 07:50:14,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-19 07:50:14,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-19 07:50:14,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-19 07:50:14,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-19 07:50:14,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:14,397 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:50:14,400 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:14,400 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:50:14,414 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:14,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 67 transitions, 144 flow [2023-11-19 07:50:14,435 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-11-19 07:50:14,435 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:14,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 101 events. 7/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 253 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2023-11-19 07:50:14,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 67 transitions, 144 flow [2023-11-19 07:50:14,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 67 transitions, 144 flow [2023-11-19 07:50:14,438 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:14,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 67 transitions, 144 flow [2023-11-19 07:50:14,438 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 67 transitions, 144 flow [2023-11-19 07:50:14,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 67 transitions, 144 flow [2023-11-19 07:50:14,455 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-11-19 07:50:14,455 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 101 events. 7/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 253 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2023-11-19 07:50:14,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904 [2023-11-19 07:50:15,654 INFO L134 LiptonReduction]: Checked pairs total: 5802 [2023-11-19 07:50:15,655 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-19 07:50:15,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:15,659 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;@b9fe8cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:15,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:50:15,660 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:15,660 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:15,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:15,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:15,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:15,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:50:15,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash 13164, now seen corresponding path program 1 times [2023-11-19 07:50:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:15,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003528520] [2023-11-19 07:50:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:15,724 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 07:50:15,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003528520] [2023-11-19 07:50:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003528520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:15,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:15,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:15,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237005198] [2023-11-19 07:50:15,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:15,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:15,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:15,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 131 [2023-11-19 07:50:15,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:15,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 131 [2023-11-19 07:50:15,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:15,812 INFO L124 PetriNetUnfolderBase]: 83/217 cut-off events. [2023-11-19 07:50:15,813 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:50:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 217 events. 83/217 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1186 event pairs, 83 based on Foata normal form. 42/214 useless extension candidates. Maximal degree in co-relation 118. Up to 158 conditions per place. [2023-11-19 07:50:15,821 INFO L140 encePairwiseOnDemand]: 123/131 looper letters, 11 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-19 07:50:15,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 76 flow [2023-11-19 07:50:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-19 07:50:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41475826972010177 [2023-11-19 07:50:15,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-19 07:50:15,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-19 07:50:15,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:15,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-19 07:50:15,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 07:50:15,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 07:50:15,835 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 72 flow. Second operand 3 states and 163 transitions. [2023-11-19 07:50:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 76 flow [2023-11-19 07:50:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:15,837 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 54 flow [2023-11-19 07:50:15,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-11-19 07:50:15,841 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2023-11-19 07:50:15,841 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 54 flow [2023-11-19 07:50:15,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:15,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:15,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:50:15,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 13165, now seen corresponding path program 1 times [2023-11-19 07:50:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:15,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225700056] [2023-11-19 07:50:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:15,892 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 07:50:15,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:15,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225700056] [2023-11-19 07:50:15,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225700056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:15,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:15,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198932379] [2023-11-19 07:50:15,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:15,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 131 [2023-11-19 07:50:15,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:15,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:15,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 131 [2023-11-19 07:50:15,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:15,980 INFO L124 PetriNetUnfolderBase]: 49/143 cut-off events. [2023-11-19 07:50:15,981 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:50:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 143 events. 49/143 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 697 event pairs, 49 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 254. Up to 99 conditions per place. [2023-11-19 07:50:15,985 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 10 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-19 07:50:15,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 74 flow [2023-11-19 07:50:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-19 07:50:15,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816793893129771 [2023-11-19 07:50:15,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-19 07:50:15,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-19 07:50:15,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:15,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-19 07:50:16,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 07:50:16,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 07:50:16,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 07:50:16,002 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 54 flow. Second operand 3 states and 150 transitions. [2023-11-19 07:50:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 74 flow [2023-11-19 07:50:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:16,004 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 53 flow [2023-11-19 07:50:16,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-19 07:50:16,007 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2023-11-19 07:50:16,007 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 53 flow [2023-11-19 07:50:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:16,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:16,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:16,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:16,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:50:16,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash -722804012, now seen corresponding path program 1 times [2023-11-19 07:50:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:16,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130596495] [2023-11-19 07:50:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:16,057 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 07:50:16,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:16,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130596495] [2023-11-19 07:50:16,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130596495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:16,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:16,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458739617] [2023-11-19 07:50:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:16,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 131 [2023-11-19 07:50:16,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 07:50:16,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:16,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 131 [2023-11-19 07:50:16,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:16,131 INFO L124 PetriNetUnfolderBase]: 81/203 cut-off events. [2023-11-19 07:50:16,132 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:50:16,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 203 events. 81/203 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 996 event pairs, 49 based on Foata normal form. 28/223 useless extension candidates. Maximal degree in co-relation 387. Up to 119 conditions per place. [2023-11-19 07:50:16,134 INFO L140 encePairwiseOnDemand]: 123/131 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-11-19 07:50:16,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 128 flow [2023-11-19 07:50:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-11-19 07:50:16,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-11-19 07:50:16,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-11-19 07:50:16,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-11-19 07:50:16,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:16,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-11-19 07:50:16,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 07:50:16,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 07:50:16,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 07:50:16,139 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 53 flow. Second operand 3 states and 166 transitions. [2023-11-19 07:50:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 128 flow [2023-11-19 07:50:16,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:16,141 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 94 flow [2023-11-19 07:50:16,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-19 07:50:16,142 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-11-19 07:50:16,142 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 94 flow [2023-11-19 07:50:16,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 07:50:16,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:16,143 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:50:16,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:50:16,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:50:16,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash 693709351, now seen corresponding path program 1 times [2023-11-19 07:50:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:16,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134388269] [2023-11-19 07:50:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:16,160 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:16,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:16,175 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:16,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:50:16,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-19 07:50:16,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:50:16,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:50:16,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-19 07:50:16,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:50:16,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:50:16,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:50:16,177 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:50:16,178 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:16,178 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:50:16,194 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:16,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 188 flow [2023-11-19 07:50:16,213 INFO L124 PetriNetUnfolderBase]: 10/137 cut-off events. [2023-11-19 07:50:16,213 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:50:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 10/137 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 372 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2023-11-19 07:50:16,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 85 transitions, 188 flow [2023-11-19 07:50:16,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 188 flow [2023-11-19 07:50:16,216 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:16,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 85 transitions, 188 flow [2023-11-19 07:50:16,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 85 transitions, 188 flow [2023-11-19 07:50:16,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 188 flow [2023-11-19 07:50:16,232 INFO L124 PetriNetUnfolderBase]: 10/137 cut-off events. [2023-11-19 07:50:16,232 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:50:16,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 10/137 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 372 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2023-11-19 07:50:16,237 INFO L119 LiptonReduction]: Number of co-enabled transitions 3774 [2023-11-19 07:50:17,703 INFO L134 LiptonReduction]: Checked pairs total: 10284 [2023-11-19 07:50:17,704 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-11-19 07:50:17,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:17,712 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;@b9fe8cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:17,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:50:17,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:17,714 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:17,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:17,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:17,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:50:17,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash 18922, now seen corresponding path program 1 times [2023-11-19 07:50:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:17,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487728589] [2023-11-19 07:50:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:17,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:17,794 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 07:50:17,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:17,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487728589] [2023-11-19 07:50:17,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487728589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:17,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:17,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519869373] [2023-11-19 07:50:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:17,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 164 [2023-11-19 07:50:17,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:17,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:17,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 164 [2023-11-19 07:50:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:17,981 INFO L124 PetriNetUnfolderBase]: 450/952 cut-off events. [2023-11-19 07:50:17,981 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-11-19 07:50:17,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 952 events. 450/952 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6582 event pairs, 450 based on Foata normal form. 171/1002 useless extension candidates. Maximal degree in co-relation 336. Up to 705 conditions per place. [2023-11-19 07:50:17,993 INFO L140 encePairwiseOnDemand]: 156/164 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-19 07:50:17,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 102 flow [2023-11-19 07:50:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-11-19 07:50:17,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2023-11-19 07:50:17,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-11-19 07:50:17,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-11-19 07:50:17,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:17,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-11-19 07:50:17,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 07:50:18,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,001 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 94 flow. Second operand 3 states and 202 transitions. [2023-11-19 07:50:18,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 102 flow [2023-11-19 07:50:18,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 100 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:18,003 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 72 flow [2023-11-19 07:50:18,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-11-19 07:50:18,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2023-11-19 07:50:18,004 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 72 flow [2023-11-19 07:50:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:50:18,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:50:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 18923, now seen corresponding path program 1 times [2023-11-19 07:50:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671845920] [2023-11-19 07:50:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,034 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 07:50:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671845920] [2023-11-19 07:50:18,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671845920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:18,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:18,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314512876] [2023-11-19 07:50:18,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:18,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:18,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 164 [2023-11-19 07:50:18,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 07:50:18,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:18,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 164 [2023-11-19 07:50:18,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:18,157 INFO L124 PetriNetUnfolderBase]: 279/633 cut-off events. [2023-11-19 07:50:18,157 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-19 07:50:18,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 633 events. 279/633 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4094 event pairs, 279 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 1142. Up to 449 conditions per place. [2023-11-19 07:50:18,164 INFO L140 encePairwiseOnDemand]: 162/164 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-19 07:50:18,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 98 flow [2023-11-19 07:50:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-19 07:50:18,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2023-11-19 07:50:18,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-19 07:50:18,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-19 07:50:18,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:18,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-19 07:50:18,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:18,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,170 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 72 flow. Second operand 3 states and 189 transitions. [2023-11-19 07:50:18,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 98 flow [2023-11-19 07:50:18,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:18,172 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 71 flow [2023-11-19 07:50:18,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-11-19 07:50:18,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2023-11-19 07:50:18,174 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 71 flow [2023-11-19 07:50:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 07:50:18,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:18,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:50:18,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:50:18,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1074262529, now seen corresponding path program 1 times [2023-11-19 07:50:18,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313321637] [2023-11-19 07:50:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,227 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 07:50:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313321637] [2023-11-19 07:50:18,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313321637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:18,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:18,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:18,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041230905] [2023-11-19 07:50:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:18,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 164 [2023-11-19 07:50:18,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 07:50:18,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:18,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 164 [2023-11-19 07:50:18,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:18,474 INFO L124 PetriNetUnfolderBase]: 966/1762 cut-off events. [2023-11-19 07:50:18,474 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-11-19 07:50:18,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3442 conditions, 1762 events. 966/1762 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11580 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 3432. Up to 993 conditions per place. [2023-11-19 07:50:18,492 INFO L140 encePairwiseOnDemand]: 154/164 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-11-19 07:50:18,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 181 flow [2023-11-19 07:50:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-11-19 07:50:18,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2023-11-19 07:50:18,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-11-19 07:50:18,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-11-19 07:50:18,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:18,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-11-19 07:50:18,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 07:50:18,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,498 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 71 flow. Second operand 3 states and 203 transitions. [2023-11-19 07:50:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 181 flow [2023-11-19 07:50:18,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:18,501 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 128 flow [2023-11-19 07:50:18,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-19 07:50:18,502 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-11-19 07:50:18,502 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 128 flow [2023-11-19 07:50:18,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 07:50:18,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:50:18,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:50:18,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1112557700, now seen corresponding path program 1 times [2023-11-19 07:50:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116549911] [2023-11-19 07:50:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116549911] [2023-11-19 07:50:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116549911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514431868] [2023-11-19 07:50:18,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:18,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:18,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 164 [2023-11-19 07:50:18,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 07:50:18,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:18,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 164 [2023-11-19 07:50:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:18,605 INFO L124 PetriNetUnfolderBase]: 49/233 cut-off events. [2023-11-19 07:50:18,605 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-19 07:50:18,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 233 events. 49/233 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1147 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 515. Up to 58 conditions per place. [2023-11-19 07:50:18,608 INFO L140 encePairwiseOnDemand]: 158/164 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-11-19 07:50:18,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 136 flow [2023-11-19 07:50:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2023-11-19 07:50:18,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2023-11-19 07:50:18,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2023-11-19 07:50:18,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2023-11-19 07:50:18,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:18,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2023-11-19 07:50:18,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 07:50:18,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:18,612 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 128 flow. Second operand 3 states and 209 transitions. [2023-11-19 07:50:18,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 136 flow [2023-11-19 07:50:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:18,618 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 76 flow [2023-11-19 07:50:18,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-11-19 07:50:18,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-11-19 07:50:18,620 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 76 flow [2023-11-19 07:50:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 07:50:18,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:18,620 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:50:18,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:50:18,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:50:18,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1491704423, now seen corresponding path program 1 times [2023-11-19 07:50:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508881106] [2023-11-19 07:50:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:18,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:18,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:18,668 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:18,668 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-19 07:50:18,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-19 07:50:18,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-19 07:50:18,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-19 07:50:18,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-19 07:50:18,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-19 07:50:18,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-19 07:50:18,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-19 07:50:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:50:18,670 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 07:50:18,670 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:18,670 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:50:18,705 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:18,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 103 transitions, 234 flow [2023-11-19 07:50:18,736 INFO L124 PetriNetUnfolderBase]: 13/173 cut-off events. [2023-11-19 07:50:18,736 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:50:18,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 173 events. 13/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 145. Up to 10 conditions per place. [2023-11-19 07:50:18,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 103 transitions, 234 flow [2023-11-19 07:50:18,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 234 flow [2023-11-19 07:50:18,740 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:18,740 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 103 transitions, 234 flow [2023-11-19 07:50:18,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 103 transitions, 234 flow [2023-11-19 07:50:18,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 103 transitions, 234 flow [2023-11-19 07:50:18,760 INFO L124 PetriNetUnfolderBase]: 13/173 cut-off events. [2023-11-19 07:50:18,760 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:50:18,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 173 events. 13/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 145. Up to 10 conditions per place. [2023-11-19 07:50:18,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 6256 [2023-11-19 07:50:20,185 INFO L134 LiptonReduction]: Checked pairs total: 18970 [2023-11-19 07:50:20,185 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-11-19 07:50:20,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:20,187 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;@b9fe8cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:20,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 07:50:20,189 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:20,189 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:20,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:20,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:20,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:20,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:50:20,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash 25867, now seen corresponding path program 1 times [2023-11-19 07:50:20,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:20,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300684699] [2023-11-19 07:50:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:20,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:20,199 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 07:50:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300684699] [2023-11-19 07:50:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300684699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:20,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155468818] [2023-11-19 07:50:20,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:20,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-11-19 07:50:20,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 134 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 07:50:20,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:20,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-11-19 07:50:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:21,211 INFO L124 PetriNetUnfolderBase]: 4429/7607 cut-off events. [2023-11-19 07:50:21,211 INFO L125 PetriNetUnfolderBase]: For 1310/1310 co-relation queries the response was YES. [2023-11-19 07:50:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14204 conditions, 7607 events. 4429/7607 cut-off events. For 1310/1310 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 62671 event pairs, 4429 based on Foata normal form. 1796/8077 useless extension candidates. Maximal degree in co-relation 2915. Up to 6114 conditions per place. [2023-11-19 07:50:21,289 INFO L140 encePairwiseOnDemand]: 187/197 looper letters, 21 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2023-11-19 07:50:21,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 142 flow [2023-11-19 07:50:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:50:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 185 transitions. [2023-11-19 07:50:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46954314720812185 [2023-11-19 07:50:21,291 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 185 transitions. [2023-11-19 07:50:21,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 185 transitions. [2023-11-19 07:50:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:21,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 185 transitions. [2023-11-19 07:50:21,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.5) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 07:50:21,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 07:50:21,294 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 07:50:21,294 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 134 flow. Second operand 2 states and 185 transitions. [2023-11-19 07:50:21,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 142 flow [2023-11-19 07:50:21,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 36 transitions, 136 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:21,298 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 94 flow [2023-11-19 07:50:21,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-19 07:50:21,299 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-11-19 07:50:21,299 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 94 flow [2023-11-19 07:50:21,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 07:50:21,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:21,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:50:21,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:50:21,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash 25866, now seen corresponding path program 1 times [2023-11-19 07:50:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622744439] [2023-11-19 07:50:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:21,324 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 07:50:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:21,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622744439] [2023-11-19 07:50:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622744439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:21,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:21,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718648137] [2023-11-19 07:50:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:21,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:21,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 197 [2023-11-19 07:50:21,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 07:50:21,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:21,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 197 [2023-11-19 07:50:21,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:22,112 INFO L124 PetriNetUnfolderBase]: 3242/5696 cut-off events. [2023-11-19 07:50:22,113 INFO L125 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2023-11-19 07:50:22,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10510 conditions, 5696 events. 3242/5696 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45891 event pairs, 3242 based on Foata normal form. 0/4871 useless extension candidates. Maximal degree in co-relation 10503. Up to 4505 conditions per place. [2023-11-19 07:50:22,176 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 19 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-19 07:50:22,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 35 transitions, 132 flow [2023-11-19 07:50:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-11-19 07:50:22,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39086294416243655 [2023-11-19 07:50:22,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-11-19 07:50:22,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-11-19 07:50:22,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:22,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-11-19 07:50:22,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 07:50:22,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:22,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:22,184 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 94 flow. Second operand 3 states and 231 transitions. [2023-11-19 07:50:22,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 35 transitions, 132 flow [2023-11-19 07:50:22,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:22,187 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 94 flow [2023-11-19 07:50:22,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-11-19 07:50:22,189 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-11-19 07:50:22,189 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 94 flow [2023-11-19 07:50:22,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 07:50:22,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:22,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:22,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:50:22,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:50:22,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash 25864, now seen corresponding path program 1 times [2023-11-19 07:50:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468734975] [2023-11-19 07:50:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:22,240 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 07:50:22,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:22,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468734975] [2023-11-19 07:50:22,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468734975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:22,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:22,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:22,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636874178] [2023-11-19 07:50:22,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:22,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:22,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:22,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 197 [2023-11-19 07:50:22,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 07:50:22,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:22,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 197 [2023-11-19 07:50:22,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:22,805 INFO L124 PetriNetUnfolderBase]: 2055/3785 cut-off events. [2023-11-19 07:50:22,805 INFO L125 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2023-11-19 07:50:22,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 3785 events. 2055/3785 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29597 event pairs, 2055 based on Foata normal form. 0/3461 useless extension candidates. Maximal degree in co-relation 6985. Up to 2897 conditions per place. [2023-11-19 07:50:22,841 INFO L140 encePairwiseOnDemand]: 195/197 looper letters, 18 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-19 07:50:22,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 34 transitions, 130 flow [2023-11-19 07:50:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-11-19 07:50:22,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3993231810490694 [2023-11-19 07:50:22,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-11-19 07:50:22,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-11-19 07:50:22,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:22,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-11-19 07:50:22,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 07:50:22,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:22,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:22,847 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 94 flow. Second operand 3 states and 236 transitions. [2023-11-19 07:50:22,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 34 transitions, 130 flow [2023-11-19 07:50:22,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:22,852 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 93 flow [2023-11-19 07:50:22,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-19 07:50:22,854 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-11-19 07:50:22,855 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 93 flow [2023-11-19 07:50:22,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 07:50:22,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:22,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:50:22,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:50:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1884326765, now seen corresponding path program 1 times [2023-11-19 07:50:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:22,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365800111] [2023-11-19 07:50:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:22,896 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 07:50:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365800111] [2023-11-19 07:50:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365800111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:22,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237062605] [2023-11-19 07:50:22,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:22,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 197 [2023-11-19 07:50:22,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 07:50:22,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:22,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 197 [2023-11-19 07:50:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:24,887 INFO L124 PetriNetUnfolderBase]: 10739/16921 cut-off events. [2023-11-19 07:50:24,888 INFO L125 PetriNetUnfolderBase]: For 1988/1988 co-relation queries the response was YES. [2023-11-19 07:50:24,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33224 conditions, 16921 events. 10739/16921 cut-off events. For 1988/1988 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 130770 event pairs, 5845 based on Foata normal form. 2210/18629 useless extension candidates. Maximal degree in co-relation 33216. Up to 9089 conditions per place. [2023-11-19 07:50:25,030 INFO L140 encePairwiseOnDemand]: 183/197 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-11-19 07:50:25,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 242 flow [2023-11-19 07:50:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-19 07:50:25,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128595600676819 [2023-11-19 07:50:25,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-19 07:50:25,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-19 07:50:25,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:25,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-19 07:50:25,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:25,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:25,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:25,036 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 93 flow. Second operand 3 states and 244 transitions. [2023-11-19 07:50:25,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 242 flow [2023-11-19 07:50:25,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:25,044 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 170 flow [2023-11-19 07:50:25,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-19 07:50:25,046 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2023-11-19 07:50:25,046 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 170 flow [2023-11-19 07:50:25,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 07:50:25,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:25,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:50:25,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:50:25,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 965008109, now seen corresponding path program 1 times [2023-11-19 07:50:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:25,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788897693] [2023-11-19 07:50:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:25,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:25,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788897693] [2023-11-19 07:50:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788897693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:25,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:25,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:25,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840195345] [2023-11-19 07:50:25,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:25,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:25,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:25,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-11-19 07:50:25,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 07:50:25,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:25,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-11-19 07:50:25,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:25,299 INFO L124 PetriNetUnfolderBase]: 149/641 cut-off events. [2023-11-19 07:50:25,299 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-11-19 07:50:25,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1450 conditions, 641 events. 149/641 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4249 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 1441. Up to 164 conditions per place. [2023-11-19 07:50:25,303 INFO L140 encePairwiseOnDemand]: 189/197 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-11-19 07:50:25,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 177 flow [2023-11-19 07:50:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-19 07:50:25,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230118443316413 [2023-11-19 07:50:25,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-19 07:50:25,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-19 07:50:25,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:25,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-19 07:50:25,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 07:50:25,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:25,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 07:50:25,311 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 170 flow. Second operand 3 states and 250 transitions. [2023-11-19 07:50:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 177 flow [2023-11-19 07:50:25,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 141 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:25,316 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 98 flow [2023-11-19 07:50:25,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-11-19 07:50:25,317 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-11-19 07:50:25,317 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 98 flow [2023-11-19 07:50:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 07:50:25,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:25,318 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:25,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:50:25,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:50:25,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1322116618, now seen corresponding path program 1 times [2023-11-19 07:50:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:25,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163040793] [2023-11-19 07:50:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:25,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:25,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:25,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:25,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:25,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-19 07:50:25,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-19 07:50:25,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-19 07:50:25,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-19 07:50:25,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-19 07:50:25,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-19 07:50:25,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-19 07:50:25,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-19 07:50:25,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-19 07:50:25,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:50:25,356 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-19 07:50:25,357 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:25,357 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 07:50:25,390 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 121 transitions, 282 flow [2023-11-19 07:50:25,436 INFO L124 PetriNetUnfolderBase]: 16/209 cut-off events. [2023-11-19 07:50:25,436 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:50:25,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 209 events. 16/209 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 609 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 186. Up to 12 conditions per place. [2023-11-19 07:50:25,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 121 transitions, 282 flow [2023-11-19 07:50:25,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 121 transitions, 282 flow [2023-11-19 07:50:25,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:25,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 121 transitions, 282 flow [2023-11-19 07:50:25,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 121 transitions, 282 flow [2023-11-19 07:50:25,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 121 transitions, 282 flow [2023-11-19 07:50:25,462 INFO L124 PetriNetUnfolderBase]: 16/209 cut-off events. [2023-11-19 07:50:25,463 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:50:25,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 209 events. 16/209 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 609 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 186. Up to 12 conditions per place. [2023-11-19 07:50:25,474 INFO L119 LiptonReduction]: Number of co-enabled transitions 9350 [2023-11-19 07:50:27,115 INFO L134 LiptonReduction]: Checked pairs total: 28819 [2023-11-19 07:50:27,115 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-19 07:50:27,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:27,117 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;@b9fe8cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:27,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-19 07:50:27,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:27,119 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:27,119 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:27,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:27,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:27,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 07:50:27,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash 33778, now seen corresponding path program 1 times [2023-11-19 07:50:27,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:27,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577188638] [2023-11-19 07:50:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:27,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:27,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:27,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577188638] [2023-11-19 07:50:27,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577188638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:27,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:27,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928253134] [2023-11-19 07:50:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:27,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:27,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 232 [2023-11-19 07:50:27,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 07:50:27,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:27,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 232 [2023-11-19 07:50:27,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:30,529 INFO L124 PetriNetUnfolderBase]: 16130/25000 cut-off events. [2023-11-19 07:50:30,529 INFO L125 PetriNetUnfolderBase]: For 6750/6750 co-relation queries the response was YES. [2023-11-19 07:50:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47934 conditions, 25000 events. 16130/25000 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 206130 event pairs, 16130 based on Foata normal form. 6315/28330 useless extension candidates. Maximal degree in co-relation 10156. Up to 20993 conditions per place. [2023-11-19 07:50:30,873 INFO L140 encePairwiseOnDemand]: 219/232 looper letters, 23 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-19 07:50:30,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 172 flow [2023-11-19 07:50:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-11-19 07:50:30,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-19 07:50:30,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-11-19 07:50:30,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-11-19 07:50:30,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:30,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-11-19 07:50:30,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 07:50:30,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:30,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:30,884 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 164 flow. Second operand 3 states and 288 transitions. [2023-11-19 07:50:30,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 172 flow [2023-11-19 07:50:30,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 160 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:30,890 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 114 flow [2023-11-19 07:50:30,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-11-19 07:50:30,890 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2023-11-19 07:50:30,891 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 114 flow [2023-11-19 07:50:30,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 07:50:30,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:30,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:30,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:50:30,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 07:50:30,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash 33779, now seen corresponding path program 1 times [2023-11-19 07:50:30,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:30,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607337786] [2023-11-19 07:50:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:30,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:30,912 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 07:50:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:30,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607337786] [2023-11-19 07:50:30,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607337786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:30,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140536787] [2023-11-19 07:50:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:30,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:30,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:30,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 232 [2023-11-19 07:50:30,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 07:50:30,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:30,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 232 [2023-11-19 07:50:30,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:32,773 INFO L124 PetriNetUnfolderBase]: 10327/16553 cut-off events. [2023-11-19 07:50:32,773 INFO L125 PetriNetUnfolderBase]: For 3410/3410 co-relation queries the response was YES. [2023-11-19 07:50:32,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31153 conditions, 16553 events. 10327/16553 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 134413 event pairs, 10327 based on Foata normal form. 0/15445 useless extension candidates. Maximal degree in co-relation 31142. Up to 13569 conditions per place. [2023-11-19 07:50:32,920 INFO L140 encePairwiseOnDemand]: 230/232 looper letters, 22 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-19 07:50:32,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 41 transitions, 158 flow [2023-11-19 07:50:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-19 07:50:32,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2023-11-19 07:50:32,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-19 07:50:32,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-19 07:50:32,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:32,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-19 07:50:32,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 07:50:32,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:32,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:32,928 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 114 flow. Second operand 3 states and 270 transitions. [2023-11-19 07:50:32,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 41 transitions, 158 flow [2023-11-19 07:50:32,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:32,934 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 113 flow [2023-11-19 07:50:32,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=113, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-11-19 07:50:32,935 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2023-11-19 07:50:32,935 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 113 flow [2023-11-19 07:50:32,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 07:50:32,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:32,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:32,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 07:50:32,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 07:50:32,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1597843408, now seen corresponding path program 1 times [2023-11-19 07:50:32,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:32,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064797256] [2023-11-19 07:50:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:32,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:32,963 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 07:50:32,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:32,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064797256] [2023-11-19 07:50:32,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064797256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:32,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:32,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729368109] [2023-11-19 07:50:32,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:32,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:32,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 232 [2023-11-19 07:50:32,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 07:50:32,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:32,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 232 [2023-11-19 07:50:32,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:46,702 INFO L124 PetriNetUnfolderBase]: 93853/134307 cut-off events. [2023-11-19 07:50:46,702 INFO L125 PetriNetUnfolderBase]: For 16236/16236 co-relation queries the response was YES. [2023-11-19 07:50:47,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264556 conditions, 134307 events. 93853/134307 cut-off events. For 16236/16236 co-relation queries the response was YES. Maximal size of possible extension queue 7005. Compared 1102980 event pairs, 50283 based on Foata normal form. 16658/147680 useless extension candidates. Maximal degree in co-relation 264544. Up to 69809 conditions per place. [2023-11-19 07:50:47,655 INFO L140 encePairwiseOnDemand]: 215/232 looper letters, 47 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-11-19 07:50:47,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 299 flow [2023-11-19 07:50:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-19 07:50:47,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40660919540229884 [2023-11-19 07:50:47,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-19 07:50:47,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-19 07:50:47,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:47,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-19 07:50:47,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:47,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:47,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:47,660 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 113 flow. Second operand 3 states and 283 transitions. [2023-11-19 07:50:47,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 299 flow [2023-11-19 07:50:47,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:50:47,988 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 208 flow [2023-11-19 07:50:47,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-19 07:50:47,991 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -6 predicate places. [2023-11-19 07:50:47,992 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 208 flow [2023-11-19 07:50:47,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 07:50:47,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:47,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:47,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-19 07:50:47,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 07:50:47,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash -855452916, now seen corresponding path program 1 times [2023-11-19 07:50:47,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690882022] [2023-11-19 07:50:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:48,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690882022] [2023-11-19 07:50:48,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690882022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:48,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:48,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:48,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848575327] [2023-11-19 07:50:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:48,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:48,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 232 [2023-11-19 07:50:48,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 07:50:48,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:48,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 232 [2023-11-19 07:50:48,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:48,236 INFO L124 PetriNetUnfolderBase]: 405/1641 cut-off events. [2023-11-19 07:50:48,236 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2023-11-19 07:50:48,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 1641 events. 405/1641 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13532 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 3699. Up to 436 conditions per place. [2023-11-19 07:50:48,242 INFO L140 encePairwiseOnDemand]: 222/232 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-11-19 07:50:48,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 218 flow [2023-11-19 07:50:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-11-19 07:50:48,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2023-11-19 07:50:48,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-11-19 07:50:48,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-11-19 07:50:48,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:48,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-11-19 07:50:48,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 07:50:48,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:48,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 07:50:48,247 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 208 flow. Second operand 3 states and 291 transitions. [2023-11-19 07:50:48,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 218 flow [2023-11-19 07:50:48,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 174 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:48,255 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 120 flow [2023-11-19 07:50:48,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-11-19 07:50:48,256 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-11-19 07:50:48,256 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 120 flow [2023-11-19 07:50:48,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 07:50:48,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:48,257 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:48,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-19 07:50:48,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 07:50:48,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:48,258 INFO L85 PathProgramCache]: Analyzing trace with hash 427092245, now seen corresponding path program 1 times [2023-11-19 07:50:48,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:48,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862821721] [2023-11-19 07:50:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:48,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:48,288 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:48,289 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:48,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-19 07:50:48,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-19 07:50:48,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-19 07:50:48,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-19 07:50:48,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-11-19 07:50:48,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-19 07:50:48,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-19 07:50:48,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-19 07:50:48,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-19 07:50:48,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-19 07:50:48,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-19 07:50:48,291 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 07:50:48,292 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:48,292 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-19 07:50:48,317 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:48,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 139 transitions, 332 flow [2023-11-19 07:50:48,346 INFO L124 PetriNetUnfolderBase]: 19/245 cut-off events. [2023-11-19 07:50:48,346 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:50:48,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 245 events. 19/245 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 724 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 228. Up to 14 conditions per place. [2023-11-19 07:50:48,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 139 transitions, 332 flow [2023-11-19 07:50:48,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 139 transitions, 332 flow [2023-11-19 07:50:48,350 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:48,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 139 transitions, 332 flow [2023-11-19 07:50:48,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 139 transitions, 332 flow [2023-11-19 07:50:48,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 139 transitions, 332 flow [2023-11-19 07:50:48,369 INFO L124 PetriNetUnfolderBase]: 19/245 cut-off events. [2023-11-19 07:50:48,369 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:50:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 245 events. 19/245 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 724 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 228. Up to 14 conditions per place. [2023-11-19 07:50:48,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 13056 [2023-11-19 07:50:50,214 INFO L134 LiptonReduction]: Checked pairs total: 41599 [2023-11-19 07:50:50,214 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-11-19 07:50:50,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:50,217 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;@b9fe8cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:50,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-19 07:50:50,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:50,218 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:50:50,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:50,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:50,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:50:50,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-19 07:50:50,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 42898, now seen corresponding path program 1 times [2023-11-19 07:50:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:50,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648228962] [2023-11-19 07:50:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,257 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 07:50:50,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:50,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648228962] [2023-11-19 07:50:50,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648228962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:50,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:50,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:50,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495465906] [2023-11-19 07:50:50,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:50,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:50,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:50,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 266 [2023-11-19 07:50:50,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 07:50:50,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:50,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 266 [2023-11-19 07:50:50,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand