./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/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_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:39,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:39,471 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:39,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:39,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:39,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:39,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:39,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:39,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:39,507 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:39,508 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:39,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:39,509 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:39,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:39,511 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:39,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:39,512 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:39,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:39,513 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:39,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:39,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:39,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:39,517 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:39,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:39,518 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:39,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:39,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:39,520 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:39,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:39,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:39,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:39,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:39,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:39,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:39,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:39,523 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:39,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:39,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:39,524 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:39,525 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_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2023-11-19 07:55:39,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:39,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:39,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:39,866 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:39,866 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:39,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2023-11-19 07:55:43,012 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:43,319 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:43,320 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2023-11-19 07:55:43,337 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/data/3bbcea129/620c6b07af934809ad9121c3f960d640/FLAG51f0f6af5 [2023-11-19 07:55:43,353 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/data/3bbcea129/620c6b07af934809ad9121c3f960d640 [2023-11-19 07:55:43,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:43,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:43,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:43,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:43,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:43,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:43" (1/1) ... [2023-11-19 07:55:43,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29505598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:43, skipping insertion in model container [2023-11-19 07:55:43,374 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:43" (1/1) ... [2023-11-19 07:55:43,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:43,700 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:55:43,925 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2023-11-19 07:55:43,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:43,953 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:43,981 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:55:44,015 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2023-11-19 07:55:44,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:44,069 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:44,070 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:44,070 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:44,078 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:44,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44 WrapperNode [2023-11-19 07:55:44,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:44,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:44,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:44,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:44,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,150 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2023-11-19 07:55:44,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:44,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:44,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:44,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:44,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,169 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,169 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:44,205 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:44,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:44,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:44,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (1/1) ... [2023-11-19 07:55:44,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f0b1b5-7ff8-4f40-880b-9e61ec3c0d86/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:55:44,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:55:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:55:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:55:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:55:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:55:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:55:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:44,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:44,286 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 07:55:44,489 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:44,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:44,659 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:44,702 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:44,702 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:55:44,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:44 BoogieIcfgContainer [2023-11-19 07:55:44,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:44,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:44,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:44,714 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:44,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:43" (1/3) ... [2023-11-19 07:55:44,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c08bcc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:44, skipping insertion in model container [2023-11-19 07:55:44,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:44" (2/3) ... [2023-11-19 07:55:44,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c08bcc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:44, skipping insertion in model container [2023-11-19 07:55:44,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:44" (3/3) ... [2023-11-19 07:55:44,720 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-11-19 07:55:44,729 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:55:44,741 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:44,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:44,742 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:55:44,804 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:55:44,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 34 transitions, 72 flow [2023-11-19 07:55:44,900 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-19 07:55:44,900 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:44,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-11-19 07:55:44,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 34 transitions, 72 flow [2023-11-19 07:55:44,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 34 transitions, 72 flow [2023-11-19 07:55:44,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:44,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 34 transitions, 72 flow [2023-11-19 07:55:44,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 34 transitions, 72 flow [2023-11-19 07:55:44,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 34 transitions, 72 flow [2023-11-19 07:55:45,037 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-19 07:55:45,037 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:45,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-11-19 07:55:45,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-19 07:55:46,111 INFO L134 LiptonReduction]: Checked pairs total: 185 [2023-11-19 07:55:46,111 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-11-19 07:55:46,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:46,134 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:46,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:55:46,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:46,140 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:55:46,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:46,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:46,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:55:46,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:46,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash 4948577, now seen corresponding path program 1 times [2023-11-19 07:55:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568096029] [2023-11-19 07:55:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:46,484 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 07:55:46,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568096029] [2023-11-19 07:55:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568096029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:46,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:46,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258832023] [2023-11-19 07:55:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:46,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 63 [2023-11-19 07:55:46,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 07:55:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 63 [2023-11-19 07:55:46,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:46,563 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 07:55:46,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 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, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2023-11-19 07:55:46,565 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-11-19 07:55:46,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-19 07:55:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-19 07:55:46,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-11-19 07:55:46,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-19 07:55:46,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-19 07:55:46,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:46,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-19 07:55:46,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 07:55:46,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 07:55:46,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 07:55:46,593 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 3 states and 88 transitions. [2023-11-19 07:55:46,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-19 07:55:46,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:46,598 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 20 flow [2023-11-19 07:55:46,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2023-11-19 07:55:46,604 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2023-11-19 07:55:46,604 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 20 flow [2023-11-19 07:55:46,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 07:55:46,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:46,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:55:46,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:46,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:46,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash 460625873, now seen corresponding path program 1 times [2023-11-19 07:55:46,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:46,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082416083] [2023-11-19 07:55:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:46,651 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:46,652 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:46,653 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 07:55:46,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 07:55:46,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 07:55:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:46,656 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:55:46,659 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:46,659 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:55:46,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:55:46,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 96 flow [2023-11-19 07:55:46,686 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-19 07:55:46,686 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:55:46,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2023-11-19 07:55:46,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 96 flow [2023-11-19 07:55:46,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 43 transitions, 96 flow [2023-11-19 07:55:46,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:46,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 43 transitions, 96 flow [2023-11-19 07:55:46,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 43 transitions, 96 flow [2023-11-19 07:55:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 96 flow [2023-11-19 07:55:46,701 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-19 07:55:46,702 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:55:46,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2023-11-19 07:55:46,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 592 [2023-11-19 07:55:47,566 INFO L134 LiptonReduction]: Checked pairs total: 1038 [2023-11-19 07:55:47,566 INFO L136 LiptonReduction]: Total number of compositions: 31 [2023-11-19 07:55:47,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:47,570 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:47,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:55:47,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:47,573 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:55:47,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:47,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:47,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:55:47,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:55:47,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash 7475695, now seen corresponding path program 1 times [2023-11-19 07:55:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:47,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071059651] [2023-11-19 07:55:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:47,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:47,682 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 07:55:47,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:47,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071059651] [2023-11-19 07:55:47,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071059651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:47,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:47,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:47,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773753475] [2023-11-19 07:55:47,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:47,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 74 [2023-11-19 07:55:47,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 07:55:47,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:47,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 74 [2023-11-19 07:55:47,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:47,742 INFO L124 PetriNetUnfolderBase]: 34/88 cut-off events. [2023-11-19 07:55:47,742 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-19 07:55:47,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 88 events. 34/88 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 309 event pairs, 11 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 87. Up to 54 conditions per place. [2023-11-19 07:55:47,744 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 14 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-19 07:55:47,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 93 flow [2023-11-19 07:55:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-19 07:55:47,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509009009009009 [2023-11-19 07:55:47,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-19 07:55:47,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-19 07:55:47,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:47,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-19 07:55:47,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 07:55:47,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 07:55:47,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 07:55:47,751 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 46 flow. Second operand 3 states and 113 transitions. [2023-11-19 07:55:47,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 93 flow [2023-11-19 07:55:47,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:47,753 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 63 flow [2023-11-19 07:55:47,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-11-19 07:55:47,754 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2023-11-19 07:55:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 63 flow [2023-11-19 07:55:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 07:55:47,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:47,755 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:55:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:55:47,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:55:47,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1951262863, now seen corresponding path program 1 times [2023-11-19 07:55:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480439665] [2023-11-19 07:55:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:47,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:47,787 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:47,788 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:47,788 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:55:47,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:55:47,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:55:47,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:55:47,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:55:47,794 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:55:47,795 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:47,795 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:55:47,813 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:55:47,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 52 transitions, 122 flow [2023-11-19 07:55:47,840 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-19 07:55:47,841 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:55:47,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 128 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2023-11-19 07:55:47,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 52 transitions, 122 flow [2023-11-19 07:55:47,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 52 transitions, 122 flow [2023-11-19 07:55:47,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:47,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 52 transitions, 122 flow [2023-11-19 07:55:47,844 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 52 transitions, 122 flow [2023-11-19 07:55:47,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 52 transitions, 122 flow [2023-11-19 07:55:47,859 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-19 07:55:47,859 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:55:47,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 128 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2023-11-19 07:55:47,862 INFO L119 LiptonReduction]: Number of co-enabled transitions 1104 [2023-11-19 07:55:48,811 INFO L134 LiptonReduction]: Checked pairs total: 2103 [2023-11-19 07:55:48,812 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-11-19 07:55:48,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:48,815 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:48,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:55:48,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:48,818 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:55:48,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:48,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:48,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:55:48,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:55:48,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash 10521138, now seen corresponding path program 1 times [2023-11-19 07:55:48,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:48,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634430046] [2023-11-19 07:55:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:48,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:48,913 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 07:55:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634430046] [2023-11-19 07:55:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634430046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:48,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:48,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:48,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302721] [2023-11-19 07:55:48,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:48,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:48,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2023-11-19 07:55:48,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 07:55:48,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:48,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2023-11-19 07:55:48,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:49,072 INFO L124 PetriNetUnfolderBase]: 240/432 cut-off events. [2023-11-19 07:55:49,074 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-19 07:55:49,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 432 events. 240/432 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1992 event pairs, 67 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 229. Up to 344 conditions per place. [2023-11-19 07:55:49,084 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 20 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-19 07:55:49,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 138 flow [2023-11-19 07:55:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-19 07:55:49,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49812734082397003 [2023-11-19 07:55:49,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-19 07:55:49,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-19 07:55:49,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:49,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-19 07:55:49,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:49,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 07:55:49,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 07:55:49,103 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 133 transitions. [2023-11-19 07:55:49,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 138 flow [2023-11-19 07:55:49,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 134 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:49,105 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 88 flow [2023-11-19 07:55:49,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-19 07:55:49,106 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-11-19 07:55:49,106 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 88 flow [2023-11-19 07:55:49,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 07:55:49,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:49,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:49,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:49,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:55:49,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -452434395, now seen corresponding path program 1 times [2023-11-19 07:55:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:49,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685706209] [2023-11-19 07:55:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,204 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 07:55:49,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:49,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685706209] [2023-11-19 07:55:49,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685706209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:49,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:49,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722154685] [2023-11-19 07:55:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:49,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:49,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:49,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2023-11-19 07:55:49,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 88 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 07:55:49,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:49,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2023-11-19 07:55:49,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:49,314 INFO L124 PetriNetUnfolderBase]: 307/529 cut-off events. [2023-11-19 07:55:49,314 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-19 07:55:49,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 529 events. 307/529 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2440 event pairs, 65 based on Foata normal form. 64/583 useless extension candidates. Maximal degree in co-relation 898. Up to 422 conditions per place. [2023-11-19 07:55:49,319 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 22 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2023-11-19 07:55:49,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 154 flow [2023-11-19 07:55:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-19 07:55:49,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2023-11-19 07:55:49,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-19 07:55:49,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-19 07:55:49,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:49,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-19 07:55:49,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 07:55:49,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 07:55:49,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 07:55:49,324 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 88 flow. Second operand 3 states and 128 transitions. [2023-11-19 07:55:49,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 154 flow [2023-11-19 07:55:49,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:49,326 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 93 flow [2023-11-19 07:55:49,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-19 07:55:49,328 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 07:55:49,328 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 93 flow [2023-11-19 07:55:49,328 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 07:55:49,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:49,328 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:55:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:55:49,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:55:49,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1395661466, now seen corresponding path program 1 times [2023-11-19 07:55:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113837417] [2023-11-19 07:55:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:49,360 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:49,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:49,383 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:49,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:55:49,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:55:49,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:55:49,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:55:49,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:55:49,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:55:49,385 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:55:49,386 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:49,386 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:55:49,414 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:55:49,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 61 transitions, 150 flow [2023-11-19 07:55:49,440 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-19 07:55:49,441 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:55:49,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 111 events. 9/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 164 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 97. Up to 10 conditions per place. [2023-11-19 07:55:49,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 61 transitions, 150 flow [2023-11-19 07:55:49,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 61 transitions, 150 flow [2023-11-19 07:55:49,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:49,444 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 61 transitions, 150 flow [2023-11-19 07:55:49,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 61 transitions, 150 flow [2023-11-19 07:55:49,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 61 transitions, 150 flow [2023-11-19 07:55:49,458 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-19 07:55:49,459 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:55:49,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 111 events. 9/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 164 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 97. Up to 10 conditions per place. [2023-11-19 07:55:49,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 1760 [2023-11-19 07:55:50,476 INFO L134 LiptonReduction]: Checked pairs total: 3773 [2023-11-19 07:55:50,476 INFO L136 LiptonReduction]: Total number of compositions: 42 [2023-11-19 07:55:50,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:50,479 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:50,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:55:50,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:50,481 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-19 07:55:50,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:50,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:50,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:55:50,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:55:50,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash 13936084, now seen corresponding path program 1 times [2023-11-19 07:55:50,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:50,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563927581] [2023-11-19 07:55:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:50,520 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 07:55:50,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:50,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563927581] [2023-11-19 07:55:50,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563927581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:50,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:50,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:50,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980162646] [2023-11-19 07:55:50,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:50,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:50,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:50,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:50,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 103 [2023-11-19 07:55:50,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 07:55:50,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:50,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 103 [2023-11-19 07:55:50,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:50,849 INFO L124 PetriNetUnfolderBase]: 1464/2224 cut-off events. [2023-11-19 07:55:50,850 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2023-11-19 07:55:50,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 2224 events. 1464/2224 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 11929 event pairs, 423 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 922. Up to 1982 conditions per place. [2023-11-19 07:55:50,872 INFO L140 encePairwiseOnDemand]: 91/103 looper letters, 26 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-11-19 07:55:50,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 189 flow [2023-11-19 07:55:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-19 07:55:50,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016181229773463 [2023-11-19 07:55:50,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-19 07:55:50,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-19 07:55:50,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:50,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-19 07:55:50,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 07:55:50,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:55:50,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:55:50,878 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 88 flow. Second operand 3 states and 155 transitions. [2023-11-19 07:55:50,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 189 flow [2023-11-19 07:55:50,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 177 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:50,881 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 115 flow [2023-11-19 07:55:50,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-19 07:55:50,882 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-11-19 07:55:50,882 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 115 flow [2023-11-19 07:55:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 07:55:50,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:50,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:55:50,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:55:50,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1607414384, now seen corresponding path program 1 times [2023-11-19 07:55:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:50,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865863380] [2023-11-19 07:55:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:55:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865863380] [2023-11-19 07:55:50,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865863380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:50,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:50,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022593387] [2023-11-19 07:55:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:50,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 103 [2023-11-19 07:55:50,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 07:55:50,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:50,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 103 [2023-11-19 07:55:50,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:51,268 INFO L124 PetriNetUnfolderBase]: 1801/2699 cut-off events. [2023-11-19 07:55:51,268 INFO L125 PetriNetUnfolderBase]: For 786/786 co-relation queries the response was YES. [2023-11-19 07:55:51,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6449 conditions, 2699 events. 1801/2699 cut-off events. For 786/786 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14136 event pairs, 395 based on Foata normal form. 454/3114 useless extension candidates. Maximal degree in co-relation 4778. Up to 2352 conditions per place. [2023-11-19 07:55:51,295 INFO L140 encePairwiseOnDemand]: 95/103 looper letters, 29 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2023-11-19 07:55:51,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 204 flow [2023-11-19 07:55:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-19 07:55:51,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47896440129449835 [2023-11-19 07:55:51,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-19 07:55:51,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-19 07:55:51,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:51,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-19 07:55:51,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 07:55:51,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:55:51,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:55:51,300 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 115 flow. Second operand 3 states and 148 transitions. [2023-11-19 07:55:51,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 204 flow [2023-11-19 07:55:51,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:51,303 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 122 flow [2023-11-19 07:55:51,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-19 07:55:51,304 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-11-19 07:55:51,304 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 122 flow [2023-11-19 07:55:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 07:55:51,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:51,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:51,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:55:51,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:55:51,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1022096045, now seen corresponding path program 1 times [2023-11-19 07:55:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966618531] [2023-11-19 07:55:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:51,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:51,333 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:51,333 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:51,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:55:51,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:55:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 07:55:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:55:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:55:51,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:55:51,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:55:51,334 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:55:51,335 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:51,335 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 07:55:51,360 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:55:51,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 70 transitions, 180 flow [2023-11-19 07:55:51,378 INFO L124 PetriNetUnfolderBase]: 11/133 cut-off events. [2023-11-19 07:55:51,378 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:55:51,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 133 events. 11/133 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 201 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2023-11-19 07:55:51,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 70 transitions, 180 flow [2023-11-19 07:55:51,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 70 transitions, 180 flow [2023-11-19 07:55:51,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:51,382 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 70 transitions, 180 flow [2023-11-19 07:55:51,382 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 70 transitions, 180 flow [2023-11-19 07:55:51,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 70 transitions, 180 flow [2023-11-19 07:55:51,400 INFO L124 PetriNetUnfolderBase]: 11/133 cut-off events. [2023-11-19 07:55:51,400 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:55:51,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 133 events. 11/133 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 201 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2023-11-19 07:55:51,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 2560 [2023-11-19 07:55:52,469 INFO L134 LiptonReduction]: Checked pairs total: 5096 [2023-11-19 07:55:52,469 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-11-19 07:55:52,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:52,472 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:52,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:55:52,474 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:52,474 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-19 07:55:52,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:52,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:52,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:55:52,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 07:55:52,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash 17880979, now seen corresponding path program 1 times [2023-11-19 07:55:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:52,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439211379] [2023-11-19 07:55:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:52,583 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 07:55:52,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439211379] [2023-11-19 07:55:52,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439211379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:52,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838424800] [2023-11-19 07:55:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:52,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:52,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 119 [2023-11-19 07:55:52,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 07:55:52,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:52,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 119 [2023-11-19 07:55:52,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:53,569 INFO L124 PetriNetUnfolderBase]: 5980/8310 cut-off events. [2023-11-19 07:55:53,569 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2023-11-19 07:55:53,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 8310 events. 5980/8310 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 46314 event pairs, 1759 based on Foata normal form. 0/6187 useless extension candidates. Maximal degree in co-relation 3476. Up to 7756 conditions per place. [2023-11-19 07:55:53,655 INFO L140 encePairwiseOnDemand]: 106/119 looper letters, 31 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2023-11-19 07:55:53,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 238 flow [2023-11-19 07:55:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-19 07:55:53,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48179271708683474 [2023-11-19 07:55:53,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-19 07:55:53,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-19 07:55:53,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:53,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-19 07:55:53,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 07:55:53,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:53,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:53,661 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 106 flow. Second operand 3 states and 172 transitions. [2023-11-19 07:55:53,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 238 flow [2023-11-19 07:55:53,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 214 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:53,666 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 138 flow [2023-11-19 07:55:53,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-19 07:55:53,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-11-19 07:55:53,667 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 138 flow [2023-11-19 07:55:53,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 07:55:53,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:53,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:53,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:55:53,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 07:55:53,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -43419152, now seen corresponding path program 1 times [2023-11-19 07:55:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231943242] [2023-11-19 07:55:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:53,714 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 07:55:53,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:53,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231943242] [2023-11-19 07:55:53,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231943242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:53,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:53,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:53,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755654528] [2023-11-19 07:55:53,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:53,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:53,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:53,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 119 [2023-11-19 07:55:53,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 07:55:53,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:53,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 119 [2023-11-19 07:55:53,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:55,054 INFO L124 PetriNetUnfolderBase]: 8535/11405 cut-off events. [2023-11-19 07:55:55,054 INFO L125 PetriNetUnfolderBase]: For 2720/2720 co-relation queries the response was YES. [2023-11-19 07:55:55,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27982 conditions, 11405 events. 8535/11405 cut-off events. For 2720/2720 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59016 event pairs, 2043 based on Foata normal form. 2092/13443 useless extension candidates. Maximal degree in co-relation 20744. Up to 10912 conditions per place. [2023-11-19 07:55:55,152 INFO L140 encePairwiseOnDemand]: 109/119 looper letters, 37 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-19 07:55:55,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 252 flow [2023-11-19 07:55:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-19 07:55:55,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-11-19 07:55:55,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-19 07:55:55,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-19 07:55:55,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:55,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-19 07:55:55,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 07:55:55,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:55,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:55,156 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 138 flow. Second operand 3 states and 168 transitions. [2023-11-19 07:55:55,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 252 flow [2023-11-19 07:55:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:55,162 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 147 flow [2023-11-19 07:55:55,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-19 07:55:55,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-19 07:55:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 147 flow [2023-11-19 07:55:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 07:55:55,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:55,166 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:55,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:55:55,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 07:55:55,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1930176100, now seen corresponding path program 1 times [2023-11-19 07:55:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:55,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851571449] [2023-11-19 07:55:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:55,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:55,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:55,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:55,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:55:55,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-19 07:55:55,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-19 07:55:55,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-19 07:55:55,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-19 07:55:55,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-19 07:55:55,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-19 07:55:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:55:55,234 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:55:55,234 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:55,234 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-19 07:55:55,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:55:55,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 212 flow [2023-11-19 07:55:55,288 INFO L124 PetriNetUnfolderBase]: 13/155 cut-off events. [2023-11-19 07:55:55,288 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:55:55,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 155 events. 13/155 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 242 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 152. Up to 14 conditions per place. [2023-11-19 07:55:55,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 79 transitions, 212 flow [2023-11-19 07:55:55,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 79 transitions, 212 flow [2023-11-19 07:55:55,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:55,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 79 transitions, 212 flow [2023-11-19 07:55:55,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 79 transitions, 212 flow [2023-11-19 07:55:55,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 212 flow [2023-11-19 07:55:55,306 INFO L124 PetriNetUnfolderBase]: 13/155 cut-off events. [2023-11-19 07:55:55,307 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:55:55,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 155 events. 13/155 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 242 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 152. Up to 14 conditions per place. [2023-11-19 07:55:55,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 3504 [2023-11-19 07:55:56,520 INFO L134 LiptonReduction]: Checked pairs total: 8850 [2023-11-19 07:55:56,521 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-19 07:55:56,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:56,523 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:56,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:55:56,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:56,524 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-19 07:55:56,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:56,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:55:56,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-19 07:55:56,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash 22187724, now seen corresponding path program 1 times [2023-11-19 07:55:56,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:56,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149533019] [2023-11-19 07:55:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:56,554 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 07:55:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149533019] [2023-11-19 07:55:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149533019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:56,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406798000] [2023-11-19 07:55:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:56,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 131 [2023-11-19 07:55:56,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 07:55:56,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:56,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 131 [2023-11-19 07:55:56,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:01,040 INFO L124 PetriNetUnfolderBase]: 32246/44232 cut-off events. [2023-11-19 07:56:01,040 INFO L125 PetriNetUnfolderBase]: For 20783/20783 co-relation queries the response was YES. [2023-11-19 07:56:01,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92593 conditions, 44232 events. 32246/44232 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 2863. Compared 287037 event pairs, 10687 based on Foata normal form. 0/32705 useless extension candidates. Maximal degree in co-relation 18659. Up to 40404 conditions per place. [2023-11-19 07:56:01,752 INFO L140 encePairwiseOnDemand]: 113/131 looper letters, 37 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-11-19 07:56:01,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 301 flow [2023-11-19 07:56:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-11-19 07:56:01,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038167938931297 [2023-11-19 07:56:01,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-11-19 07:56:01,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-11-19 07:56:01,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:01,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-11-19 07:56:01,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 07:56:01,759 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 07:56:01,759 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 07:56:01,759 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 142 flow. Second operand 3 states and 198 transitions. [2023-11-19 07:56:01,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 301 flow [2023-11-19 07:56:01,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 261 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:01,785 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 169 flow [2023-11-19 07:56:01,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-19 07:56:01,787 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-11-19 07:56:01,787 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 169 flow [2023-11-19 07:56:01,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 07:56:01,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:01,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:01,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:56:01,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-19 07:56:01,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1060163404, now seen corresponding path program 1 times [2023-11-19 07:56:01,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:01,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982120185] [2023-11-19 07:56:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982120185] [2023-11-19 07:56:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982120185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171465079] [2023-11-19 07:56:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:01,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 131 [2023-11-19 07:56:01,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 169 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 07:56:01,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:01,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 131 [2023-11-19 07:56:01,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:06,793 INFO L124 PetriNetUnfolderBase]: 42327/56957 cut-off events. [2023-11-19 07:56:06,793 INFO L125 PetriNetUnfolderBase]: For 13628/13628 co-relation queries the response was YES. [2023-11-19 07:56:06,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133795 conditions, 56957 events. 42327/56957 cut-off events. For 13628/13628 co-relation queries the response was YES. Maximal size of possible extension queue 2561. Compared 353112 event pairs, 11441 based on Foata normal form. 11464/68286 useless extension candidates. Maximal degree in co-relation 99498. Up to 52416 conditions per place. [2023-11-19 07:56:07,316 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 44 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-11-19 07:56:07,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 306 flow [2023-11-19 07:56:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-11-19 07:56:07,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47837150127226463 [2023-11-19 07:56:07,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-11-19 07:56:07,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-11-19 07:56:07,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:07,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-11-19 07:56:07,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:07,323 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 07:56:07,323 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 07:56:07,323 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 169 flow. Second operand 3 states and 188 transitions. [2023-11-19 07:56:07,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 306 flow [2023-11-19 07:56:07,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:07,345 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 180 flow [2023-11-19 07:56:07,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-19 07:56:07,347 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-19 07:56:07,347 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 180 flow [2023-11-19 07:56:07,348 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 07:56:07,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:07,348 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:07,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:56:07,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-19 07:56:07,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:07,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1295540204, now seen corresponding path program 1 times [2023-11-19 07:56:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:07,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700488097] [2023-11-19 07:56:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:07,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:07,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:07,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:07,408 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:56:07,409 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-19 07:56:07,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-19 07:56:07,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-19 07:56:07,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-19 07:56:07,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-19 07:56:07,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-19 07:56:07,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-19 07:56:07,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-19 07:56:07,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:56:07,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:56:07,413 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:56:07,414 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-19 07:56:07,439 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:56:07,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 88 transitions, 246 flow [2023-11-19 07:56:07,464 INFO L124 PetriNetUnfolderBase]: 15/177 cut-off events. [2023-11-19 07:56:07,465 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-19 07:56:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 177 events. 15/177 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 181. Up to 16 conditions per place. [2023-11-19 07:56:07,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 88 transitions, 246 flow [2023-11-19 07:56:07,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 88 transitions, 246 flow [2023-11-19 07:56:07,469 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:07,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 88 transitions, 246 flow [2023-11-19 07:56:07,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 88 transitions, 246 flow [2023-11-19 07:56:07,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 88 transitions, 246 flow [2023-11-19 07:56:07,491 INFO L124 PetriNetUnfolderBase]: 15/177 cut-off events. [2023-11-19 07:56:07,491 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-19 07:56:07,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 177 events. 15/177 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 181. Up to 16 conditions per place. [2023-11-19 07:56:07,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-11-19 07:56:08,725 INFO L134 LiptonReduction]: Checked pairs total: 12348 [2023-11-19 07:56:08,726 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-19 07:56:08,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:08,728 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3fa35c2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:08,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 07:56:08,729 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:08,729 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:56:08,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:08,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:08,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:56:08,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-19 07:56:08,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash 26958066, now seen corresponding path program 1 times [2023-11-19 07:56:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:08,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224272438] [2023-11-19 07:56:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:08,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:08,780 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 07:56:08,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:08,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224272438] [2023-11-19 07:56:08,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224272438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:08,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:08,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:08,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558447891] [2023-11-19 07:56:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:08,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:08,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 145 [2023-11-19 07:56:08,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 07:56:08,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:08,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 145 [2023-11-19 07:56:08,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand