./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/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_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/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_3ea0a421-b744-4fcb-be97-40a8e4daabd0/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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:31,724 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:31,850 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:31,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:31,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:31,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:31,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:31,900 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:31,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:31,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:31,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:31,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:31,909 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:31,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:31,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:31,912 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:31,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:31,913 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:31,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:31,914 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:31,914 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:31,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:31,915 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:31,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:31,917 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:31,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:31,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:31,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:31,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:31,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:31,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:31,922 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:31,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:31,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:31,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:31,923 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:31,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:31,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:31,924 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:31,924 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_3ea0a421-b744-4fcb-be97-40a8e4daabd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2023-11-19 08:01:32,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:32,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:32,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:32,282 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:32,283 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:32,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-19 08:01:35,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:35,831 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:35,836 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-19 08:01:35,861 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/data/05167d969/cc9a0741519442c1b79003d4fac9ac3e/FLAG8f1e499f2 [2023-11-19 08:01:35,881 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/data/05167d969/cc9a0741519442c1b79003d4fac9ac3e [2023-11-19 08:01:35,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:35,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:35,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:35,894 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:35,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:35,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:35" (1/1) ... [2023-11-19 08:01:35,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e071ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:35, skipping insertion in model container [2023-11-19 08:01:35,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:35" (1/1) ... [2023-11-19 08:01:35,967 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:36,411 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_3ea0a421-b744-4fcb-be97-40a8e4daabd0/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2023-11-19 08:01:36,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:36,432 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:36,481 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_3ea0a421-b744-4fcb-be97-40a8e4daabd0/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2023-11-19 08:01:36,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:36,539 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:36,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36 WrapperNode [2023-11-19 08:01:36,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:36,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:36,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:36,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:36,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,585 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,606 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 46 [2023-11-19 08:01:36,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:36,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:36,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:36,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:36,625 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,641 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,650 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:36,652 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:36,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:36,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:36,653 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (1/1) ... [2023-11-19 08:01:36,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:36,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:36,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea0a421-b744-4fcb-be97-40a8e4daabd0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 08:01:36,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 08:01:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:36,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:36,738 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:01:36,864 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:36,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:37,017 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:37,081 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:37,081 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:01:37,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:37 BoogieIcfgContainer [2023-11-19 08:01:37,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:37,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:37,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:37,091 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:37,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:35" (1/3) ... [2023-11-19 08:01:37,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628ae028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:37, skipping insertion in model container [2023-11-19 08:01:37,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:36" (2/3) ... [2023-11-19 08:01:37,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628ae028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:37, skipping insertion in model container [2023-11-19 08:01:37,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:37" (3/3) ... [2023-11-19 08:01:37,094 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-11-19 08:01:37,103 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:01:37,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:37,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:37,115 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:37,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:37,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 80 flow [2023-11-19 08:01:37,224 INFO L124 PetriNetUnfolderBase]: 3/49 cut-off events. [2023-11-19 08:01:37,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:37,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 49 events. 3/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-11-19 08:01:37,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 80 flow [2023-11-19 08:01:37,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 80 flow [2023-11-19 08:01:37,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:37,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 80 flow [2023-11-19 08:01:37,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 80 flow [2023-11-19 08:01:37,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 80 flow [2023-11-19 08:01:37,268 INFO L124 PetriNetUnfolderBase]: 3/49 cut-off events. [2023-11-19 08:01:37,268 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:37,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 49 events. 3/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-11-19 08:01:37,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 336 [2023-11-19 08:01:38,518 INFO L134 LiptonReduction]: Checked pairs total: 274 [2023-11-19 08:01:38,519 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-11-19 08:01:38,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:38,557 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;@7b2939f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:38,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:01:38,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:38,564 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 08:01:38,564 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:38,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:38,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:01:38,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:38,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash 6636660, now seen corresponding path program 1 times [2023-11-19 08:01:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:38,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322337002] [2023-11-19 08:01:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:38,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:38,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:38,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322337002] [2023-11-19 08:01:38,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322337002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:38,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:38,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85834410] [2023-11-19 08:01:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:38,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:01:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:01:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:38,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2023-11-19 08:01:38,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:38,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2023-11-19 08:01:38,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:38,903 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 08:01:38,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:38,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-19 08:01:38,905 INFO L140 encePairwiseOnDemand]: 74/76 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-19 08:01:38,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-19 08:01:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:01:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2023-11-19 08:01:38,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45394736842105265 [2023-11-19 08:01:38,920 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 69 transitions. [2023-11-19 08:01:38,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 69 transitions. [2023-11-19 08:01:38,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:38,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 69 transitions. [2023-11-19 08:01:38,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,933 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,935 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 69 transitions. [2023-11-19 08:01:38,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-19 08:01:38,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:38,940 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-19 08:01:38,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-19 08:01:38,947 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-19 08:01:38,947 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-19 08:01:38,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:38,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:01:38,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:38,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:38,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2082846403, now seen corresponding path program 1 times [2023-11-19 08:01:38,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:38,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283932260] [2023-11-19 08:01:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:38,979 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:39,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:39,018 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:39,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 08:01:39,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 08:01:39,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 08:01:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:01:39,026 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 08:01:39,030 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:39,030 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:01:39,053 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 112 flow [2023-11-19 08:01:39,089 INFO L124 PetriNetUnfolderBase]: 5/75 cut-off events. [2023-11-19 08:01:39,089 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 124 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 50. Up to 6 conditions per place. [2023-11-19 08:01:39,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 51 transitions, 112 flow [2023-11-19 08:01:39,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 51 transitions, 112 flow [2023-11-19 08:01:39,096 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:39,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions, 112 flow [2023-11-19 08:01:39,097 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 51 transitions, 112 flow [2023-11-19 08:01:39,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 112 flow [2023-11-19 08:01:39,125 INFO L124 PetriNetUnfolderBase]: 5/75 cut-off events. [2023-11-19 08:01:39,126 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:39,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 124 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 50. Up to 6 conditions per place. [2023-11-19 08:01:39,130 INFO L119 LiptonReduction]: Number of co-enabled transitions 984 [2023-11-19 08:01:39,994 INFO L134 LiptonReduction]: Checked pairs total: 2531 [2023-11-19 08:01:39,994 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-11-19 08:01:39,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:39,997 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;@7b2939f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:39,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 08:01:40,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:40,001 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-11-19 08:01:40,001 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:40,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:40,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:40,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 08:01:40,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1744906792, now seen corresponding path program 1 times [2023-11-19 08:01:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:40,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767710921] [2023-11-19 08:01:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:40,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767710921] [2023-11-19 08:01:40,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767710921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:40,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:40,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:40,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074156217] [2023-11-19 08:01:40,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:40,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:40,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:40,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 86 [2023-11-19 08:01:40,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:40,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:40,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 86 [2023-11-19 08:01:40,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:40,213 INFO L124 PetriNetUnfolderBase]: 97/220 cut-off events. [2023-11-19 08:01:40,214 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:01:40,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 220 events. 97/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1043 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 164. Up to 143 conditions per place. [2023-11-19 08:01:40,217 INFO L140 encePairwiseOnDemand]: 77/86 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-11-19 08:01:40,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 127 flow [2023-11-19 08:01:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-19 08:01:40,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2023-11-19 08:01:40,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-19 08:01:40,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-19 08:01:40,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:40,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-19 08:01:40,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:40,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:40,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:40,224 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 54 flow. Second operand 3 states and 128 transitions. [2023-11-19 08:01:40,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 127 flow [2023-11-19 08:01:40,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:40,226 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 88 flow [2023-11-19 08:01:40,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-11-19 08:01:40,228 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-11-19 08:01:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 88 flow [2023-11-19 08:01:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:40,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:40,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:01:40,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:01:40,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 08:01:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash -897846534, now seen corresponding path program 1 times [2023-11-19 08:01:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:40,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655995781] [2023-11-19 08:01:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:40,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:40,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:40,280 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:40,280 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:40,281 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 08:01:40,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 08:01:40,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 08:01:40,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 08:01:40,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:01:40,282 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 08:01:40,283 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:40,283 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:01:40,307 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 146 flow [2023-11-19 08:01:40,325 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-11-19 08:01:40,325 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:01:40,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 7/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 79. Up to 8 conditions per place. [2023-11-19 08:01:40,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 146 flow [2023-11-19 08:01:40,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 146 flow [2023-11-19 08:01:40,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:40,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 64 transitions, 146 flow [2023-11-19 08:01:40,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 64 transitions, 146 flow [2023-11-19 08:01:40,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 146 flow [2023-11-19 08:01:40,343 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-11-19 08:01:40,343 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:01:40,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 7/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 79. Up to 8 conditions per place. [2023-11-19 08:01:40,347 INFO L119 LiptonReduction]: Number of co-enabled transitions 1944 [2023-11-19 08:01:41,327 INFO L134 LiptonReduction]: Checked pairs total: 6704 [2023-11-19 08:01:41,327 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-11-19 08:01:41,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:41,330 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;@7b2939f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:41,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 08:01:41,333 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:41,333 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-19 08:01:41,334 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:41,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:41,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:41,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:01:41,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1091629626, now seen corresponding path program 1 times [2023-11-19 08:01:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:41,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441676970] [2023-11-19 08:01:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:41,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:41,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441676970] [2023-11-19 08:01:41,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441676970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:41,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:41,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:41,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887021279] [2023-11-19 08:01:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:41,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:41,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:41,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 108 [2023-11-19 08:01:41,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:41,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 108 [2023-11-19 08:01:41,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:41,644 INFO L124 PetriNetUnfolderBase]: 966/1762 cut-off events. [2023-11-19 08:01:41,645 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2023-11-19 08:01:41,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3474 conditions, 1762 events. 966/1762 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11459 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 564. Up to 993 conditions per place. [2023-11-19 08:01:41,664 INFO L140 encePairwiseOnDemand]: 94/108 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-11-19 08:01:41,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 182 flow [2023-11-19 08:01:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-19 08:01:41,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2023-11-19 08:01:41,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-19 08:01:41,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-19 08:01:41,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:41,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-19 08:01:41,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,672 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 84 flow. Second operand 3 states and 157 transitions. [2023-11-19 08:01:41,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 182 flow [2023-11-19 08:01:41,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 178 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:41,676 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 126 flow [2023-11-19 08:01:41,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-19 08:01:41,677 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-11-19 08:01:41,677 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 126 flow [2023-11-19 08:01:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:41,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:01:41,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:01:41,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1278759299, now seen corresponding path program 1 times [2023-11-19 08:01:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:41,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606976258] [2023-11-19 08:01:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:01:41,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:41,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606976258] [2023-11-19 08:01:41,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606976258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:41,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:41,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:41,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554305269] [2023-11-19 08:01:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:41,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 108 [2023-11-19 08:01:41,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:41,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 108 [2023-11-19 08:01:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:41,843 INFO L124 PetriNetUnfolderBase]: 49/233 cut-off events. [2023-11-19 08:01:41,843 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-19 08:01:41,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 233 events. 49/233 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1138 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 307. Up to 58 conditions per place. [2023-11-19 08:01:41,845 INFO L140 encePairwiseOnDemand]: 102/108 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-11-19 08:01:41,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 134 flow [2023-11-19 08:01:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-19 08:01:41,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2023-11-19 08:01:41,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-19 08:01:41,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-19 08:01:41,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:41,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-19 08:01:41,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,852 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 126 flow. Second operand 3 states and 155 transitions. [2023-11-19 08:01:41,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 134 flow [2023-11-19 08:01:41,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:41,855 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 74 flow [2023-11-19 08:01:41,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-19 08:01:41,857 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-11-19 08:01:41,857 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 74 flow [2023-11-19 08:01:41,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:41,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:41,858 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 08:01:41,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:01:41,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:01:41,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1896375007, now seen corresponding path program 1 times [2023-11-19 08:01:41,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:41,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762617753] [2023-11-19 08:01:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:41,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:41,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:41,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:41,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:41,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 08:01:41,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 08:01:41,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 08:01:41,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 08:01:41,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 08:01:41,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:01:41,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 08:01:41,893 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:41,893 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 08:01:41,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:41,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 182 flow [2023-11-19 08:01:41,941 INFO L124 PetriNetUnfolderBase]: 9/127 cut-off events. [2023-11-19 08:01:41,941 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:01:41,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 127 events. 9/127 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2023-11-19 08:01:41,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 182 flow [2023-11-19 08:01:41,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 182 flow [2023-11-19 08:01:41,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:41,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 77 transitions, 182 flow [2023-11-19 08:01:41,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 77 transitions, 182 flow [2023-11-19 08:01:41,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 182 flow [2023-11-19 08:01:41,958 INFO L124 PetriNetUnfolderBase]: 9/127 cut-off events. [2023-11-19 08:01:41,958 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:01:41,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 127 events. 9/127 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2023-11-19 08:01:41,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 3216 [2023-11-19 08:01:43,079 INFO L134 LiptonReduction]: Checked pairs total: 11851 [2023-11-19 08:01:43,080 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-11-19 08:01:43,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:43,085 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;@7b2939f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:43,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:01:43,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:43,087 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-19 08:01:43,088 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:43,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:43,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:43,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 08:01:43,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1572921585, now seen corresponding path program 1 times [2023-11-19 08:01:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644505945] [2023-11-19 08:01:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:43,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644505945] [2023-11-19 08:01:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644505945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:43,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:43,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:43,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971320354] [2023-11-19 08:01:43,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:43,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:43,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:43,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:43,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 128 [2023-11-19 08:01:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:43,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:43,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 128 [2023-11-19 08:01:43,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:45,509 INFO L124 PetriNetUnfolderBase]: 10745/16935 cut-off events. [2023-11-19 08:01:45,510 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2023-11-19 08:01:45,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33857 conditions, 16935 events. 10745/16935 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 131047 event pairs, 5857 based on Foata normal form. 2766/19188 useless extension candidates. Maximal degree in co-relation 3785. Up to 9097 conditions per place. [2023-11-19 08:01:45,671 INFO L140 encePairwiseOnDemand]: 109/128 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-11-19 08:01:45,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 251 flow [2023-11-19 08:01:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-11-19 08:01:45,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-11-19 08:01:45,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-11-19 08:01:45,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-11-19 08:01:45,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:45,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-11-19 08:01:45,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,679 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 112 flow. Second operand 3 states and 188 transitions. [2023-11-19 08:01:45,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 251 flow [2023-11-19 08:01:45,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 239 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:45,689 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 168 flow [2023-11-19 08:01:45,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-19 08:01:45,692 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-19 08:01:45,692 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 168 flow [2023-11-19 08:01:45,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:45,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:45,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:01:45,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 08:01:45,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 247157827, now seen corresponding path program 1 times [2023-11-19 08:01:45,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647417288] [2023-11-19 08:01:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:45,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:01:45,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647417288] [2023-11-19 08:01:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647417288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:45,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:45,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783294870] [2023-11-19 08:01:45,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:45,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:45,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 128 [2023-11-19 08:01:45,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:45,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 128 [2023-11-19 08:01:45,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:45,871 INFO L124 PetriNetUnfolderBase]: 149/641 cut-off events. [2023-11-19 08:01:45,872 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-11-19 08:01:45,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1447 conditions, 641 events. 149/641 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4266 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 871. Up to 164 conditions per place. [2023-11-19 08:01:45,876 INFO L140 encePairwiseOnDemand]: 120/128 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-11-19 08:01:45,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 175 flow [2023-11-19 08:01:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-19 08:01:45,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-11-19 08:01:45,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-19 08:01:45,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-19 08:01:45,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:45,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-19 08:01:45,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,883 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 168 flow. Second operand 3 states and 184 transitions. [2023-11-19 08:01:45,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 175 flow [2023-11-19 08:01:45,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:45,890 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 96 flow [2023-11-19 08:01:45,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-11-19 08:01:45,893 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2023-11-19 08:01:45,893 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 96 flow [2023-11-19 08:01:45,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:45,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:45,894 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:45,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:01:45,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 08:01:45,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash 61757748, now seen corresponding path program 1 times [2023-11-19 08:01:45,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:45,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367137888] [2023-11-19 08:01:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:45,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:45,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:45,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:45,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 08:01:45,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 08:01:45,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 08:01:45,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 08:01:45,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 08:01:45,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 08:01:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:01:45,959 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 08:01:45,960 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:45,960 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 08:01:45,987 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:45,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 220 flow [2023-11-19 08:01:46,004 INFO L124 PetriNetUnfolderBase]: 11/153 cut-off events. [2023-11-19 08:01:46,004 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:01:46,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 153 events. 11/153 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 140. Up to 12 conditions per place. [2023-11-19 08:01:46,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 90 transitions, 220 flow [2023-11-19 08:01:46,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 90 transitions, 220 flow [2023-11-19 08:01:46,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:46,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 90 transitions, 220 flow [2023-11-19 08:01:46,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 90 transitions, 220 flow [2023-11-19 08:01:46,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 220 flow [2023-11-19 08:01:46,107 INFO L124 PetriNetUnfolderBase]: 11/153 cut-off events. [2023-11-19 08:01:46,107 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:01:46,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 153 events. 11/153 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 140. Up to 12 conditions per place. [2023-11-19 08:01:46,113 INFO L119 LiptonReduction]: Number of co-enabled transitions 4800 [2023-11-19 08:01:47,298 INFO L134 LiptonReduction]: Checked pairs total: 18260 [2023-11-19 08:01:47,299 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-11-19 08:01:47,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:47,301 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;@7b2939f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:47,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:01:47,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:47,304 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-19 08:01:47,304 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:47,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:47,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:47,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:01:47,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash 438143051, now seen corresponding path program 1 times [2023-11-19 08:01:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:47,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858637218] [2023-11-19 08:01:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858637218] [2023-11-19 08:01:47,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858637218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:47,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:47,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469738068] [2023-11-19 08:01:47,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:47,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 150 [2023-11-19 08:01:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:47,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 150 [2023-11-19 08:01:47,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:59,285 INFO L124 PetriNetUnfolderBase]: 84206/120198 cut-off events. [2023-11-19 08:01:59,285 INFO L125 PetriNetUnfolderBase]: For 38290/38290 co-relation queries the response was YES. [2023-11-19 08:01:59,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243093 conditions, 120198 events. 84206/120198 cut-off events. For 38290/38290 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 971682 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 30452. Up to 62881 conditions per place. [2023-11-19 08:02:00,686 INFO L140 encePairwiseOnDemand]: 128/150 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-11-19 08:02:00,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 316 flow [2023-11-19 08:02:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-11-19 08:02:00,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-19 08:02:00,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-11-19 08:02:00,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-11-19 08:02:00,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:00,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-11-19 08:02:00,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:00,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:00,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:00,698 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 142 flow. Second operand 3 states and 215 transitions. [2023-11-19 08:02:00,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 316 flow [2023-11-19 08:02:00,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 292 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-19 08:02:00,738 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 202 flow [2023-11-19 08:02:00,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-19 08:02:00,739 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-19 08:02:00,740 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 202 flow [2023-11-19 08:02:00,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:00,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:00,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:00,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:02:00,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:02:00,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1925168326, now seen corresponding path program 1 times [2023-11-19 08:02:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398359244] [2023-11-19 08:02:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:02:00,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398359244] [2023-11-19 08:02:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398359244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:00,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:00,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898124164] [2023-11-19 08:02:00,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:00,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:00,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:00,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 150 [2023-11-19 08:02:00,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:00,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:00,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 150 [2023-11-19 08:02:00,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:01,054 INFO L124 PetriNetUnfolderBase]: 405/1641 cut-off events. [2023-11-19 08:02:01,054 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2023-11-19 08:02:01,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3712 conditions, 1641 events. 405/1641 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13541 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2211. Up to 436 conditions per place. [2023-11-19 08:02:01,066 INFO L140 encePairwiseOnDemand]: 140/150 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-11-19 08:02:01,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 216 flow [2023-11-19 08:02:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-19 08:02:01,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2023-11-19 08:02:01,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-19 08:02:01,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-19 08:02:01,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:01,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-19 08:02:01,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:01,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:01,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:01,073 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 202 flow. Second operand 3 states and 213 transitions. [2023-11-19 08:02:01,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 216 flow [2023-11-19 08:02:01,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:02:01,082 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 118 flow [2023-11-19 08:02:01,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-11-19 08:02:01,085 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-11-19 08:02:01,086 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 118 flow [2023-11-19 08:02:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:01,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:01,086 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:01,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:02:01,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 08:02:01,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1516461566, now seen corresponding path program 1 times [2023-11-19 08:02:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:01,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864629646] [2023-11-19 08:02:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:01,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:02:01,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:02:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:02:01,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:02:01,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:02:01,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 08:02:01,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-19 08:02:01,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-19 08:02:01,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-19 08:02:01,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-19 08:02:01,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-19 08:02:01,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-19 08:02:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:02:01,143 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 08:02:01,144 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:02:01,145 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-19 08:02:01,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:02:01,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 260 flow [2023-11-19 08:02:01,217 INFO L124 PetriNetUnfolderBase]: 13/179 cut-off events. [2023-11-19 08:02:01,218 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 08:02:01,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 179 events. 13/179 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 366 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 172. Up to 14 conditions per place. [2023-11-19 08:02:01,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 103 transitions, 260 flow [2023-11-19 08:02:01,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 103 transitions, 260 flow [2023-11-19 08:02:01,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:02:01,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 103 transitions, 260 flow [2023-11-19 08:02:01,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 103 transitions, 260 flow [2023-11-19 08:02:01,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 260 flow [2023-11-19 08:02:01,241 INFO L124 PetriNetUnfolderBase]: 13/179 cut-off events. [2023-11-19 08:02:01,242 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 08:02:01,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 179 events. 13/179 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 366 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 172. Up to 14 conditions per place. [2023-11-19 08:02:01,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 6696 [2023-11-19 08:02:02,695 INFO L134 LiptonReduction]: Checked pairs total: 25592 [2023-11-19 08:02:02,695 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-11-19 08:02:02,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:02,697 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;@7b2939f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:02,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 08:02:02,699 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:02:02,700 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-19 08:02:02,700 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:02:02,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:02,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:02,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-19 08:02:02,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash -907070423, now seen corresponding path program 1 times [2023-11-19 08:02:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507320621] [2023-11-19 08:02:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:02,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:02,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507320621] [2023-11-19 08:02:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507320621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:02,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:02,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93874424] [2023-11-19 08:02:02,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:02,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:02,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 168 [2023-11-19 08:02:02,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:02,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:02,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 168 [2023-11-19 08:02:02,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand