./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/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_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/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_36e3ea08-95fd-427c-8df4-63b6cdd41bed/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 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:27,218 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:27,330 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:38:27,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:27,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:27,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:27,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:27,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:27,370 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:27,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:27,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:27,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:27,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:27,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:27,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:38:27,379 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:27,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:27,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:27,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:27,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:38:27,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:27,382 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:38:27,382 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:27,383 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:38:27,383 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:27,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:27,384 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:27,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:27,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:27,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:27,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:27,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:38:27,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:38:27,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:38:27,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:27,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:38:27,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:27,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:27,388 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:27,388 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_36e3ea08-95fd-427c-8df4-63b6cdd41bed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 [2023-11-19 07:38:27,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:27,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:27,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:27,748 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:27,751 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:27,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-19 07:38:30,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:31,233 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:31,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-19 07:38:31,257 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/data/6973884f4/eb131daddab745b0af27298d95e78858/FLAG9446c3d17 [2023-11-19 07:38:31,284 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/data/6973884f4/eb131daddab745b0af27298d95e78858 [2023-11-19 07:38:31,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:31,288 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:31,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:31,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:31,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:31,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:31,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aad30d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31, skipping insertion in model container [2023-11-19 07:38:31,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:31,353 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:31,744 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_36e3ea08-95fd-427c-8df4-63b6cdd41bed/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2023-11-19 07:38:31,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:31,778 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:38:31,841 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_36e3ea08-95fd-427c-8df4-63b6cdd41bed/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2023-11-19 07:38:31,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:31,912 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:38:31,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31 WrapperNode [2023-11-19 07:38:31,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:31,915 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:31,915 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:38:31,915 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:38:31,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:31,961 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:31,993 INFO L138 Inliner]: procedures = 164, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2023-11-19 07:38:31,993 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:31,994 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:38:31,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:38:31,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:38:32,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,026 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,045 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:38:32,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:38:32,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:38:32,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:38:32,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (1/1) ... [2023-11-19 07:38:32,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:32,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:32,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e3ea08-95fd-427c-8df4-63b6cdd41bed/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:38:32,122 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-19 07:38:32,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-19 07:38:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:38:32,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:38:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:38:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:38:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:38:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:38:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:38:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:38:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:38:32,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:38:32,126 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 07:38:32,254 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:38:32,256 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:38:32,427 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:38:32,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:38:32,437 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:38:32,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:32 BoogieIcfgContainer [2023-11-19 07:38:32,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:38:32,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:38:32,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:38:32,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:38:32,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:31" (1/3) ... [2023-11-19 07:38:32,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b48aba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:32, skipping insertion in model container [2023-11-19 07:38:32,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:31" (2/3) ... [2023-11-19 07:38:32,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b48aba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:32, skipping insertion in model container [2023-11-19 07:38:32,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:32" (3/3) ... [2023-11-19 07:38:32,457 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2023-11-19 07:38:32,466 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:38:32,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:38:32,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:38:32,475 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:38:32,553 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:38:32,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 172 flow [2023-11-19 07:38:32,640 INFO L124 PetriNetUnfolderBase]: 6/92 cut-off events. [2023-11-19 07:38:32,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:32,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 6/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-11-19 07:38:32,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 172 flow [2023-11-19 07:38:32,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 81 transitions, 169 flow [2023-11-19 07:38:32,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:38:32,668 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 81 transitions, 169 flow [2023-11-19 07:38:32,671 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 81 transitions, 169 flow [2023-11-19 07:38:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 169 flow [2023-11-19 07:38:32,722 INFO L124 PetriNetUnfolderBase]: 6/92 cut-off events. [2023-11-19 07:38:32,723 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:32,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 6/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-11-19 07:38:32,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 2100 [2023-11-19 07:38:35,035 INFO L134 LiptonReduction]: Checked pairs total: 3413 [2023-11-19 07:38:35,036 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-19 07:38:35,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:35,075 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;@ead6065, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:35,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:38:35,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:38:35,085 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:38:35,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:35,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:35,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:38:35,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:38:35,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash 312934804, now seen corresponding path program 1 times [2023-11-19 07:38:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:35,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535512064] [2023-11-19 07:38:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:35,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535512064] [2023-11-19 07:38:35,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535512064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:35,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:35,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:38:35,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599651921] [2023-11-19 07:38:35,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:35,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:35,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2023-11-19 07:38:35,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 07:38:35,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:35,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2023-11-19 07:38:35,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:35,735 INFO L124 PetriNetUnfolderBase]: 205/353 cut-off events. [2023-11-19 07:38:35,735 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:38:35,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 353 events. 205/353 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1210 event pairs, 76 based on Foata normal form. 18/325 useless extension candidates. Maximal degree in co-relation 695. Up to 235 conditions per place. [2023-11-19 07:38:35,748 INFO L140 encePairwiseOnDemand]: 139/146 looper letters, 21 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-11-19 07:38:35,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 26 transitions, 105 flow [2023-11-19 07:38:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-19 07:38:35,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2023-11-19 07:38:35,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-19 07:38:35,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-19 07:38:35,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:35,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-19 07:38:35,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 07:38:35,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 07:38:35,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 07:38:35,796 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 57 flow. Second operand 3 states and 234 transitions. [2023-11-19 07:38:35,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 26 transitions, 105 flow [2023-11-19 07:38:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:35,803 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 60 flow [2023-11-19 07:38:35,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-19 07:38:35,814 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-19 07:38:35,815 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 60 flow [2023-11-19 07:38:35,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 07:38:35,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:35,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:35,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:38:35,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:38:35,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -932799753, now seen corresponding path program 1 times [2023-11-19 07:38:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170509346] [2023-11-19 07:38:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:35,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:35,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:35,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:35,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:38:35,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:38:35,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:38:35,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-19 07:38:35,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:38:35,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:38:35,898 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:38:35,900 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:38:35,901 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:38:35,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:38:35,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 127 transitions, 274 flow [2023-11-19 07:38:35,958 INFO L124 PetriNetUnfolderBase]: 8/135 cut-off events. [2023-11-19 07:38:35,958 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:38:35,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 135 events. 8/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 257 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-11-19 07:38:35,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 127 transitions, 274 flow [2023-11-19 07:38:35,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 111 transitions, 235 flow [2023-11-19 07:38:35,962 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:38:35,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 111 transitions, 235 flow [2023-11-19 07:38:35,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 111 transitions, 235 flow [2023-11-19 07:38:35,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 111 transitions, 235 flow [2023-11-19 07:38:35,984 INFO L124 PetriNetUnfolderBase]: 8/135 cut-off events. [2023-11-19 07:38:35,984 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:38:35,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 135 events. 8/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 257 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-11-19 07:38:35,991 INFO L119 LiptonReduction]: Number of co-enabled transitions 5492 [2023-11-19 07:38:38,205 INFO L134 LiptonReduction]: Checked pairs total: 12917 [2023-11-19 07:38:38,205 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-11-19 07:38:38,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:38,209 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;@ead6065, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:38,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:38:38,211 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:38:38,212 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:38:38,212 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:38,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:38,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:38:38,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:38:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash 554729591, now seen corresponding path program 1 times [2023-11-19 07:38:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015068942] [2023-11-19 07:38:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:38,337 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 07:38:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015068942] [2023-11-19 07:38:38,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015068942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:38,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:38,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:38:38,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293206058] [2023-11-19 07:38:38,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:38,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:38,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:38,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:38,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 209 [2023-11-19 07:38:38,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 07:38:38,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:38,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 209 [2023-11-19 07:38:38,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:38,872 INFO L124 PetriNetUnfolderBase]: 2174/3439 cut-off events. [2023-11-19 07:38:38,872 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-11-19 07:38:38,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6659 conditions, 3439 events. 2174/3439 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19590 event pairs, 619 based on Foata normal form. 0/2991 useless extension candidates. Maximal degree in co-relation 6648. Up to 2715 conditions per place. [2023-11-19 07:38:38,906 INFO L140 encePairwiseOnDemand]: 202/209 looper letters, 38 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-11-19 07:38:38,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 204 flow [2023-11-19 07:38:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-11-19 07:38:38,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645933014354066 [2023-11-19 07:38:38,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-11-19 07:38:38,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-11-19 07:38:38,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:38,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-11-19 07:38:38,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 07:38:38,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 07:38:38,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 07:38:38,917 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 101 flow. Second operand 3 states and 354 transitions. [2023-11-19 07:38:38,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 204 flow [2023-11-19 07:38:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:38,920 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-11-19 07:38:38,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-19 07:38:38,922 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-11-19 07:38:38,922 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-11-19 07:38:38,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 07:38:38,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:38,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:38,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:38:38,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:38:38,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1088085533, now seen corresponding path program 1 times [2023-11-19 07:38:38,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:38,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248955680] [2023-11-19 07:38:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:38,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:39,105 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 07:38:39,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:39,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248955680] [2023-11-19 07:38:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248955680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:39,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:39,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:39,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977847780] [2023-11-19 07:38:39,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:39,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:39,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 209 [2023-11-19 07:38:39,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 07:38:39,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:39,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 209 [2023-11-19 07:38:39,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:39,324 INFO L124 PetriNetUnfolderBase]: 434/913 cut-off events. [2023-11-19 07:38:39,325 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-19 07:38:39,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 913 events. 434/913 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5440 event pairs, 83 based on Foata normal form. 326/1181 useless extension candidates. Maximal degree in co-relation 1903. Up to 640 conditions per place. [2023-11-19 07:38:39,334 INFO L140 encePairwiseOnDemand]: 199/209 looper letters, 28 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2023-11-19 07:38:39,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 207 flow [2023-11-19 07:38:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-11-19 07:38:39,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-11-19 07:38:39,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-11-19 07:38:39,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-11-19 07:38:39,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:39,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-11-19 07:38:39,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 07:38:39,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 07:38:39,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 07:38:39,343 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 3 states and 342 transitions. [2023-11-19 07:38:39,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 207 flow [2023-11-19 07:38:39,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:39,348 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 128 flow [2023-11-19 07:38:39,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-11-19 07:38:39,351 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-11-19 07:38:39,352 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 128 flow [2023-11-19 07:38:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 07:38:39,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:39,353 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:38:39,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:38:39,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash 79742197, now seen corresponding path program 1 times [2023-11-19 07:38:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:39,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275250286] [2023-11-19 07:38:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:39,389 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:39,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:39,422 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:38:39,423 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:38:39,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:38:39,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-19 07:38:39,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:38:39,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:38:39,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:38:39,426 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:38:39,428 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:38:39,429 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:38:39,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:38:39,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 172 transitions, 380 flow [2023-11-19 07:38:39,516 INFO L124 PetriNetUnfolderBase]: 10/178 cut-off events. [2023-11-19 07:38:39,517 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:38:39,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 178 events. 10/178 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 433 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-11-19 07:38:39,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 172 transitions, 380 flow [2023-11-19 07:38:39,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 141 transitions, 303 flow [2023-11-19 07:38:39,521 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:38:39,521 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 141 transitions, 303 flow [2023-11-19 07:38:39,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 141 transitions, 303 flow [2023-11-19 07:38:39,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 141 transitions, 303 flow [2023-11-19 07:38:39,570 INFO L124 PetriNetUnfolderBase]: 10/178 cut-off events. [2023-11-19 07:38:39,570 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:38:39,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 178 events. 10/178 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 433 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-11-19 07:38:39,579 INFO L119 LiptonReduction]: Number of co-enabled transitions 10624 [2023-11-19 07:38:42,019 INFO L134 LiptonReduction]: Checked pairs total: 25645 [2023-11-19 07:38:42,020 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-11-19 07:38:42,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:42,029 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;@ead6065, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:42,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:38:42,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:38:42,038 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 07:38:42,038 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:42,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:42,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:38:42,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:38:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash 855735576, now seen corresponding path program 1 times [2023-11-19 07:38:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:42,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068260760] [2023-11-19 07:38:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:42,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:42,102 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 07:38:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068260760] [2023-11-19 07:38:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068260760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:38:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885763253] [2023-11-19 07:38:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:42,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 271 [2023-11-19 07:38:42,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 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 07:38:42,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:42,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 271 [2023-11-19 07:38:42,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:47,209 INFO L124 PetriNetUnfolderBase]: 32417/44098 cut-off events. [2023-11-19 07:38:47,210 INFO L125 PetriNetUnfolderBase]: For 2561/2561 co-relation queries the response was YES. [2023-11-19 07:38:47,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88698 conditions, 44098 events. 32417/44098 cut-off events. For 2561/2561 co-relation queries the response was YES. Maximal size of possible extension queue 1444. Compared 278770 event pairs, 13624 based on Foata normal form. 129/41444 useless extension candidates. Maximal degree in co-relation 88686. Up to 42097 conditions per place. [2023-11-19 07:38:47,695 INFO L140 encePairwiseOnDemand]: 263/271 looper letters, 55 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-19 07:38:47,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 289 flow [2023-11-19 07:38:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-11-19 07:38:47,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830258302583026 [2023-11-19 07:38:47,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-11-19 07:38:47,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-11-19 07:38:47,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:47,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-11-19 07:38:47,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 07:38:47,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states 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 07:38:47,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states 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 07:38:47,705 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 135 flow. Second operand 3 states and 474 transitions. [2023-11-19 07:38:47,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 289 flow [2023-11-19 07:38:47,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 284 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:47,715 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 152 flow [2023-11-19 07:38:47,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-19 07:38:47,719 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-11-19 07:38:47,721 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 152 flow [2023-11-19 07:38:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 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 07:38:47,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:47,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:47,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:38:47,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:38:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -649034261, now seen corresponding path program 1 times [2023-11-19 07:38:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035341867] [2023-11-19 07:38:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:47,821 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 07:38:47,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:47,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035341867] [2023-11-19 07:38:47,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035341867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:47,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:47,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90690845] [2023-11-19 07:38:47,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:47,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 271 [2023-11-19 07:38:47,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:47,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:47,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 271 [2023-11-19 07:38:47,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:48,297 INFO L124 PetriNetUnfolderBase]: 1907/3916 cut-off events. [2023-11-19 07:38:48,298 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2023-11-19 07:38:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7792 conditions, 3916 events. 1907/3916 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 29594 event pairs, 343 based on Foata normal form. 1444/5101 useless extension candidates. Maximal degree in co-relation 7778. Up to 2402 conditions per place. [2023-11-19 07:38:48,411 INFO L140 encePairwiseOnDemand]: 257/271 looper letters, 30 selfloop transitions, 14 changer transitions 0/65 dead transitions. [2023-11-19 07:38:48,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 269 flow [2023-11-19 07:38:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-11-19 07:38:48,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535055350553506 [2023-11-19 07:38:48,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-11-19 07:38:48,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-11-19 07:38:48,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:48,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-11-19 07:38:48,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 07:38:48,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states 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 07:38:48,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states 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 07:38:48,422 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 152 flow. Second operand 3 states and 450 transitions. [2023-11-19 07:38:48,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 269 flow [2023-11-19 07:38:48,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:48,431 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 176 flow [2023-11-19 07:38:48,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-19 07:38:48,433 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2023-11-19 07:38:48,433 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 176 flow [2023-11-19 07:38:48,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:48,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:48,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:48,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:38:48,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:38:48,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1661709751, now seen corresponding path program 1 times [2023-11-19 07:38:48,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993280040] [2023-11-19 07:38:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:48,609 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 07:38:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993280040] [2023-11-19 07:38:48,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993280040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:48,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:48,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472980177] [2023-11-19 07:38:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:38:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:38:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:48,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 271 [2023-11-19 07:38:48,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 131.85714285714286) internal successors, (923), 7 states have internal predecessors, (923), 0 states have call successors, (0), 0 states 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 07:38:48,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:48,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 271 [2023-11-19 07:38:48,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:49,422 INFO L124 PetriNetUnfolderBase]: 2183/4106 cut-off events. [2023-11-19 07:38:49,422 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-11-19 07:38:49,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9419 conditions, 4106 events. 2183/4106 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29636 event pairs, 184 based on Foata normal form. 14/4091 useless extension candidates. Maximal degree in co-relation 9405. Up to 3089 conditions per place. [2023-11-19 07:38:49,462 INFO L140 encePairwiseOnDemand]: 261/271 looper letters, 87 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-11-19 07:38:49,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 107 transitions, 552 flow [2023-11-19 07:38:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:38:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1139 transitions. [2023-11-19 07:38:49,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253690036900369 [2023-11-19 07:38:49,470 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1139 transitions. [2023-11-19 07:38:49,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1139 transitions. [2023-11-19 07:38:49,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:49,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1139 transitions. [2023-11-19 07:38:49,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.375) internal successors, (1139), 8 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 07:38:49,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states 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 07:38:49,486 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states 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 07:38:49,486 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 176 flow. Second operand 8 states and 1139 transitions. [2023-11-19 07:38:49,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 107 transitions, 552 flow [2023-11-19 07:38:49,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:49,494 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 233 flow [2023-11-19 07:38:49,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=233, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-11-19 07:38:49,495 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2023-11-19 07:38:49,496 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 233 flow [2023-11-19 07:38:49,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.85714285714286) internal successors, (923), 7 states have internal predecessors, (923), 0 states have call successors, (0), 0 states 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 07:38:49,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:49,497 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:49,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:38:49,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:38:49,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1883667892, now seen corresponding path program 1 times [2023-11-19 07:38:49,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:49,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193982874] [2023-11-19 07:38:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:49,518 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:38:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:38:49,536 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:38:49,536 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:38:49,536 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:38:49,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:38:49,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-19 07:38:49,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:38:49,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:38:49,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:38:49,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:38:49,539 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:38:49,540 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:38:49,540 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:38:49,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:38:49,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 217 transitions, 490 flow [2023-11-19 07:38:49,630 INFO L124 PetriNetUnfolderBase]: 12/221 cut-off events. [2023-11-19 07:38:49,630 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:38:49,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 221 events. 12/221 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 608 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2023-11-19 07:38:49,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 217 transitions, 490 flow [2023-11-19 07:38:49,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 171 transitions, 373 flow [2023-11-19 07:38:49,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:38:49,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 171 transitions, 373 flow [2023-11-19 07:38:49,636 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 171 transitions, 373 flow [2023-11-19 07:38:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 171 transitions, 373 flow [2023-11-19 07:38:49,674 INFO L124 PetriNetUnfolderBase]: 12/221 cut-off events. [2023-11-19 07:38:49,675 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:38:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 221 events. 12/221 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 608 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 214. Up to 10 conditions per place. [2023-11-19 07:38:49,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 17496 [2023-11-19 07:38:52,368 INFO L134 LiptonReduction]: Checked pairs total: 44830 [2023-11-19 07:38:52,369 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-11-19 07:38:52,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:52,371 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@ead6065, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:52,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:38:52,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:38:52,374 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 07:38:52,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:38:52,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:52,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:38:52,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:38:52,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1217769022, now seen corresponding path program 1 times [2023-11-19 07:38:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:52,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319559479] [2023-11-19 07:38:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:52,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:52,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319559479] [2023-11-19 07:38:52,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319559479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:52,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:52,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:38:52,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133487347] [2023-11-19 07:38:52,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:52,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:52,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 335 [2023-11-19 07:38:52,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 07:38:52,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:52,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 335 [2023-11-19 07:38:52,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand