./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/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_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/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_64b38a73-d041-40bc-a317-0469d4ff32f2/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 c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:01,938 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:02,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:02,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:02,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:02,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:02,099 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:02,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:02,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:02,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:02,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:02,108 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:02,108 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:02,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:02,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:02,111 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:02,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:02,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:02,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:02,113 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:02,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:02,114 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:02,114 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:02,115 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:02,115 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:02,116 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:02,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:02,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:02,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:02,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:02,119 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:02,120 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:02,120 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:02,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:02,121 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:02,121 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:02,121 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:02,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:02,122 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:02,122 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_64b38a73-d041-40bc-a317-0469d4ff32f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 [2023-11-19 07:40:02,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:02,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:02,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:02,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:02,457 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:02,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-11-19 07:40:05,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:05,880 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:05,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-11-19 07:40:05,900 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/data/0c5f1abbe/20448b59b7da47248e88aa113cd30cb8/FLAG35675ef3a [2023-11-19 07:40:05,919 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/data/0c5f1abbe/20448b59b7da47248e88aa113cd30cb8 [2023-11-19 07:40:05,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:05,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:05,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:05,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:05,938 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:05,941 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:05" (1/1) ... [2023-11-19 07:40:05,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa2a0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:05, skipping insertion in model container [2023-11-19 07:40:05,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:05" (1/1) ... [2023-11-19 07:40:06,019 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:06,395 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_64b38a73-d041-40bc-a317-0469d4ff32f2/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-11-19 07:40:06,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:06,420 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:06,491 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_64b38a73-d041-40bc-a317-0469d4ff32f2/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-11-19 07:40:06,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:06,547 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:06,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06 WrapperNode [2023-11-19 07:40:06,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:06,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:06,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:06,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:06,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,623 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 60 [2023-11-19 07:40:06,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:06,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:06,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:06,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:06,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,650 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,653 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:06,668 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:06,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:06,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:06,672 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (1/1) ... [2023-11-19 07:40:06,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:06,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:06,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64b38a73-d041-40bc-a317-0469d4ff32f2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:40:06,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:40:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:06,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:06,752 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:40:06,945 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:06,949 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:07,166 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:07,210 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:07,210 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:40:07,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:07 BoogieIcfgContainer [2023-11-19 07:40:07,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:07,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:07,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:07,221 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:07,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:05" (1/3) ... [2023-11-19 07:40:07,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc04b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:07, skipping insertion in model container [2023-11-19 07:40:07,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:06" (2/3) ... [2023-11-19 07:40:07,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc04b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:07, skipping insertion in model container [2023-11-19 07:40:07,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:07" (3/3) ... [2023-11-19 07:40:07,225 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-11-19 07:40:07,234 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:40:07,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:07,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:40:07,245 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:07,312 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:07,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 112 flow [2023-11-19 07:40:07,405 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-19 07:40:07,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:07,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 6/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2023-11-19 07:40:07,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 112 flow [2023-11-19 07:40:07,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 112 flow [2023-11-19 07:40:07,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:07,436 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 112 flow [2023-11-19 07:40:07,438 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 112 flow [2023-11-19 07:40:07,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 112 flow [2023-11-19 07:40:07,457 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-19 07:40:07,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:07,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 6/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2023-11-19 07:40:07,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 812 [2023-11-19 07:40:09,621 INFO L134 LiptonReduction]: Checked pairs total: 687 [2023-11-19 07:40:09,621 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-19 07:40:09,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:09,657 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:09,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:40:09,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:09,661 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:40:09,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:09,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:09,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:09,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:09,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash 8853676, now seen corresponding path program 1 times [2023-11-19 07:40:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:09,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403490608] [2023-11-19 07:40:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:09,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403490608] [2023-11-19 07:40:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403490608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:09,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:09,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010442797] [2023-11-19 07:40:09,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:09,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:09,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2023-11-19 07:40:09,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:09,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2023-11-19 07:40:09,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:09,925 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:40:09,925 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:09,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-19 07:40:09,927 INFO L140 encePairwiseOnDemand]: 110/112 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-19 07:40:09,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-19 07:40:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-11-19 07:40:09,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2023-11-19 07:40:09,943 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-11-19 07:40:09,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-11-19 07:40:09,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:09,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-11-19 07:40:09,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,956 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,958 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 101 transitions. [2023-11-19 07:40:09,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-19 07:40:09,961 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 07:40:09,962 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-19 07:40:09,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, 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 07:40:09,968 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-19 07:40:09,969 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-19 07:40:09,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:09,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:40:09,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:09,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:09,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -81584454, now seen corresponding path program 1 times [2023-11-19 07:40:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130742887] [2023-11-19 07:40:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:10,017 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:10,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:10,061 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:10,062 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 07:40:10,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 07:40:10,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 07:40:10,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:10,067 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:10,071 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:10,071 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:40:10,097 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:10,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 178 flow [2023-11-19 07:40:10,125 INFO L124 PetriNetUnfolderBase]: 11/108 cut-off events. [2023-11-19 07:40:10,125 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 71. Up to 6 conditions per place. [2023-11-19 07:40:10,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 178 flow [2023-11-19 07:40:10,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 178 flow [2023-11-19 07:40:10,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:10,130 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 178 flow [2023-11-19 07:40:10,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 178 flow [2023-11-19 07:40:10,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 178 flow [2023-11-19 07:40:10,152 INFO L124 PetriNetUnfolderBase]: 11/108 cut-off events. [2023-11-19 07:40:10,152 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:10,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 71. Up to 6 conditions per place. [2023-11-19 07:40:10,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 3364 [2023-11-19 07:40:12,836 INFO L134 LiptonReduction]: Checked pairs total: 2937 [2023-11-19 07:40:12,836 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-19 07:40:12,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:12,840 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:12,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:40:12,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:12,844 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:12,844 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:12,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:12,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:12,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:40:12,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash 15032643, now seen corresponding path program 1 times [2023-11-19 07:40:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351232521] [2023-11-19 07:40:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:12,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:12,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:12,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351232521] [2023-11-19 07:40:12,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351232521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:12,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:12,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551071850] [2023-11-19 07:40:12,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:12,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:12,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:12,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-11-19 07:40:12,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 38 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:12,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-11-19 07:40:12,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:12,945 INFO L124 PetriNetUnfolderBase]: 20/57 cut-off events. [2023-11-19 07:40:12,945 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:40:12,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-11-19 07:40:12,947 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-11-19 07:40:12,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 48 flow [2023-11-19 07:40:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 155 transitions. [2023-11-19 07:40:12,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45857988165680474 [2023-11-19 07:40:12,951 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 155 transitions. [2023-11-19 07:40:12,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 155 transitions. [2023-11-19 07:40:12,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:12,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 155 transitions. [2023-11-19 07:40:12,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,956 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,956 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 38 flow. Second operand 2 states and 155 transitions. [2023-11-19 07:40:12,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 48 flow [2023-11-19 07:40:12,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:12,957 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2023-11-19 07:40:12,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-11-19 07:40:12,959 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-11-19 07:40:12,959 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2023-11-19 07:40:12,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:12,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:12,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:40:12,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:40:12,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:40:12,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1873474311, now seen corresponding path program 1 times [2023-11-19 07:40:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:12,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668296230] [2023-11-19 07:40:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:12,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:13,020 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:13,044 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:13,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:13,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:40:13,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:40:13,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:40:13,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:40:13,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:40:13,050 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:13,051 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:13,051 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:40:13,081 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-11-19 07:40:13,110 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-11-19 07:40:13,110 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:40:13,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 16/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2023-11-19 07:40:13,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 246 flow [2023-11-19 07:40:13,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 246 flow [2023-11-19 07:40:13,115 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:13,116 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 246 flow [2023-11-19 07:40:13,116 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 246 flow [2023-11-19 07:40:13,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-11-19 07:40:13,139 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-11-19 07:40:13,139 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:40:13,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 16/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2023-11-19 07:40:13,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 7656 [2023-11-19 07:40:16,648 INFO L134 LiptonReduction]: Checked pairs total: 7330 [2023-11-19 07:40:16,648 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-19 07:40:16,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:16,652 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:16,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:40:16,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:16,655 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:16,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:16,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:16,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:16,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:40:16,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash 23142171, now seen corresponding path program 1 times [2023-11-19 07:40:16,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:16,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716319412] [2023-11-19 07:40:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716319412] [2023-11-19 07:40:16,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716319412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:16,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:16,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225424024] [2023-11-19 07:40:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:16,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:16,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:16,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 239 [2023-11-19 07:40:16,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:16,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 239 [2023-11-19 07:40:16,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:16,794 INFO L124 PetriNetUnfolderBase]: 110/225 cut-off events. [2023-11-19 07:40:16,794 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-19 07:40:16,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 898 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 118. Up to 191 conditions per place. [2023-11-19 07:40:16,801 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-11-19 07:40:16,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 68 flow [2023-11-19 07:40:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 210 transitions. [2023-11-19 07:40:16,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393305439330544 [2023-11-19 07:40:16,813 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 210 transitions. [2023-11-19 07:40:16,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 210 transitions. [2023-11-19 07:40:16,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:16,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 210 transitions. [2023-11-19 07:40:16,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 105.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,821 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,821 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 58 flow. Second operand 2 states and 210 transitions. [2023-11-19 07:40:16,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 68 flow [2023-11-19 07:40:16,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 66 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:16,828 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 44 flow [2023-11-19 07:40:16,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-11-19 07:40:16,829 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2023-11-19 07:40:16,829 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 44 flow [2023-11-19 07:40:16,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:16,830 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:40:16,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:40:16,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:40:16,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash -98951086, now seen corresponding path program 1 times [2023-11-19 07:40:16,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:16,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141611067] [2023-11-19 07:40:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:16,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:16,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:16,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:16,904 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:16,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:40:16,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:40:16,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:40:16,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:40:16,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:40:16,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:40:16,906 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:16,906 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:16,909 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:40:16,948 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:16,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 316 flow [2023-11-19 07:40:16,996 INFO L124 PetriNetUnfolderBase]: 21/194 cut-off events. [2023-11-19 07:40:16,997 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:40:16,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 21/194 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 159. Up to 10 conditions per place. [2023-11-19 07:40:16,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 316 flow [2023-11-19 07:40:17,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 316 flow [2023-11-19 07:40:17,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:17,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 316 flow [2023-11-19 07:40:17,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 316 flow [2023-11-19 07:40:17,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 316 flow [2023-11-19 07:40:17,040 INFO L124 PetriNetUnfolderBase]: 21/194 cut-off events. [2023-11-19 07:40:17,041 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:40:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 21/194 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 159. Up to 10 conditions per place. [2023-11-19 07:40:17,055 INFO L119 LiptonReduction]: Number of co-enabled transitions 13688 [2023-11-19 07:40:21,098 INFO L134 LiptonReduction]: Checked pairs total: 13008 [2023-11-19 07:40:21,098 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-19 07:40:21,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:21,101 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:21,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:40:21,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:21,103 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:21,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:21,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:21,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:21,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:40:21,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 33233585, now seen corresponding path program 1 times [2023-11-19 07:40:21,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:21,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604417244] [2023-11-19 07:40:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:21,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:21,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:21,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604417244] [2023-11-19 07:40:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604417244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:21,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:21,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447080836] [2023-11-19 07:40:21,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:21,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:21,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-11-19 07:40:21,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 76 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:21,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-11-19 07:40:21,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:21,262 INFO L124 PetriNetUnfolderBase]: 488/837 cut-off events. [2023-11-19 07:40:21,263 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-19 07:40:21,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 475. Up to 731 conditions per place. [2023-11-19 07:40:21,270 INFO L140 encePairwiseOnDemand]: 294/300 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-11-19 07:40:21,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 90 flow [2023-11-19 07:40:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-11-19 07:40:21,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-19 07:40:21,272 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-11-19 07:40:21,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-11-19 07:40:21,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:21,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-11-19 07:40:21,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,277 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,278 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 76 flow. Second operand 2 states and 264 transitions. [2023-11-19 07:40:21,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 90 flow [2023-11-19 07:40:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 84 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:21,280 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 56 flow [2023-11-19 07:40:21,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-19 07:40:21,281 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-11-19 07:40:21,282 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 56 flow [2023-11-19 07:40:21,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:21,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:21,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:40:21,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:40:21,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash -220317286, now seen corresponding path program 1 times [2023-11-19 07:40:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817051925] [2023-11-19 07:40:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:21,302 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:21,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:21,319 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:21,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:40:21,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:40:21,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 07:40:21,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:40:21,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:40:21,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:40:21,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:40:21,321 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:21,322 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:21,322 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 07:40:21,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:21,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 388 flow [2023-11-19 07:40:21,411 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2023-11-19 07:40:21,412 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:40:21,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 237 events. 26/237 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 207. Up to 12 conditions per place. [2023-11-19 07:40:21,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 388 flow [2023-11-19 07:40:21,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 388 flow [2023-11-19 07:40:21,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:21,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 388 flow [2023-11-19 07:40:21,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 388 flow [2023-11-19 07:40:21,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 388 flow [2023-11-19 07:40:21,455 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2023-11-19 07:40:21,455 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:40:21,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 237 events. 26/237 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 207. Up to 12 conditions per place. [2023-11-19 07:40:21,476 INFO L119 LiptonReduction]: Number of co-enabled transitions 21460 [2023-11-19 07:40:26,747 INFO L134 LiptonReduction]: Checked pairs total: 20991 [2023-11-19 07:40:26,748 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-11-19 07:40:26,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:26,751 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:26,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:40:26,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:26,753 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:26,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:26,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:26,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:26,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 07:40:26,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 45222057, now seen corresponding path program 1 times [2023-11-19 07:40:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:26,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631172248] [2023-11-19 07:40:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:26,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:26,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631172248] [2023-11-19 07:40:26,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631172248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:26,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:26,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:26,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149703690] [2023-11-19 07:40:26,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:26,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:26,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:26,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 367 [2023-11-19 07:40:26,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:26,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:26,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 367 [2023-11-19 07:40:26,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:27,375 INFO L124 PetriNetUnfolderBase]: 1946/2997 cut-off events. [2023-11-19 07:40:27,376 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-11-19 07:40:27,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6346 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15433 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1789. Up to 2675 conditions per place. [2023-11-19 07:40:27,400 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 17 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-11-19 07:40:27,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 114 flow [2023-11-19 07:40:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2023-11-19 07:40:27,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318801089918256 [2023-11-19 07:40:27,402 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2023-11-19 07:40:27,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2023-11-19 07:40:27,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:27,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2023-11-19 07:40:27,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:27,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:27,409 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:27,409 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 92 flow. Second operand 2 states and 317 transitions. [2023-11-19 07:40:27,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 114 flow [2023-11-19 07:40:27,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:27,416 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 68 flow [2023-11-19 07:40:27,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-11-19 07:40:27,419 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-11-19 07:40:27,419 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 68 flow [2023-11-19 07:40:27,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:27,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:27,420 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:27,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:40:27,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-19 07:40:27,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash -90127407, now seen corresponding path program 1 times [2023-11-19 07:40:27,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:27,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676329134] [2023-11-19 07:40:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:27,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:27,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:27,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:27,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:40:27,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-19 07:40:27,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-19 07:40:27,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-19 07:40:27,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-19 07:40:27,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-19 07:40:27,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-19 07:40:27,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:40:27,495 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:27,496 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:27,496 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-19 07:40:27,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:27,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 462 flow [2023-11-19 07:40:27,581 INFO L124 PetriNetUnfolderBase]: 31/280 cut-off events. [2023-11-19 07:40:27,581 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:40:27,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 280 events. 31/280 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 794 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2023-11-19 07:40:27,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 462 flow [2023-11-19 07:40:27,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 462 flow [2023-11-19 07:40:27,588 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:27,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 462 flow [2023-11-19 07:40:27,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 462 flow [2023-11-19 07:40:27,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 462 flow [2023-11-19 07:40:27,675 INFO L124 PetriNetUnfolderBase]: 31/280 cut-off events. [2023-11-19 07:40:27,675 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:40:27,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 280 events. 31/280 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 794 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2023-11-19 07:40:27,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 30972 [2023-11-19 07:40:33,249 INFO L134 LiptonReduction]: Checked pairs total: 27145 [2023-11-19 07:40:33,249 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-11-19 07:40:33,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:33,252 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:33,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:40:33,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:33,254 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:33,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:33,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:33,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:33,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-19 07:40:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 59249977, now seen corresponding path program 1 times [2023-11-19 07:40:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065597133] [2023-11-19 07:40:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065597133] [2023-11-19 07:40:33,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065597133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:33,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:33,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628225359] [2023-11-19 07:40:33,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:33,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 427 [2023-11-19 07:40:33,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:33,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 427 [2023-11-19 07:40:33,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:35,119 INFO L124 PetriNetUnfolderBase]: 7292/10449 cut-off events. [2023-11-19 07:40:35,120 INFO L125 PetriNetUnfolderBase]: For 9628/9628 co-relation queries the response was YES. [2023-11-19 07:40:35,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22304 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57390 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6460. Up to 9479 conditions per place. [2023-11-19 07:40:35,225 INFO L140 encePairwiseOnDemand]: 420/427 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-11-19 07:40:35,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 140 flow [2023-11-19 07:40:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 371 transitions. [2023-11-19 07:40:35,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2023-11-19 07:40:35,228 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 371 transitions. [2023-11-19 07:40:35,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 371 transitions. [2023-11-19 07:40:35,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:35,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 371 transitions. [2023-11-19 07:40:35,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:35,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:35,235 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:35,236 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 114 flow. Second operand 2 states and 371 transitions. [2023-11-19 07:40:35,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 140 flow [2023-11-19 07:40:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 120 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:35,248 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 80 flow [2023-11-19 07:40:35,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-11-19 07:40:35,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2023-11-19 07:40:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 80 flow [2023-11-19 07:40:35,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:35,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:35,252 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:35,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:40:35,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-19 07:40:35,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash -741744962, now seen corresponding path program 1 times [2023-11-19 07:40:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709431348] [2023-11-19 07:40:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:35,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:35,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:35,323 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:35,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-19 07:40:35,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-19 07:40:35,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-19 07:40:35,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-19 07:40:35,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-19 07:40:35,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-19 07:40:35,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-19 07:40:35,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-19 07:40:35,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:40:35,326 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:35,328 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:35,329 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-19 07:40:35,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:35,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 538 flow [2023-11-19 07:40:35,459 INFO L124 PetriNetUnfolderBase]: 36/323 cut-off events. [2023-11-19 07:40:35,460 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-19 07:40:35,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 323 events. 36/323 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 959 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-11-19 07:40:35,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 538 flow [2023-11-19 07:40:35,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 538 flow [2023-11-19 07:40:35,469 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:35,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 538 flow [2023-11-19 07:40:35,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 538 flow [2023-11-19 07:40:35,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 538 flow [2023-11-19 07:40:35,529 INFO L124 PetriNetUnfolderBase]: 36/323 cut-off events. [2023-11-19 07:40:35,529 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-19 07:40:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 323 events. 36/323 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 959 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-11-19 07:40:35,554 INFO L119 LiptonReduction]: Number of co-enabled transitions 42224 [2023-11-19 07:40:42,216 INFO L134 LiptonReduction]: Checked pairs total: 41628 [2023-11-19 07:40:42,217 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-11-19 07:40:42,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:42,219 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;@3b8e2782, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:42,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 07:40:42,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:42,221 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:42,221 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:42,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:42,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:42,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-19 07:40:42,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash 75481490, now seen corresponding path program 1 times [2023-11-19 07:40:42,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:42,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002726758] [2023-11-19 07:40:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:42,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:42,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:42,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002726758] [2023-11-19 07:40:42,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002726758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:42,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:42,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741379696] [2023-11-19 07:40:42,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:42,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:42,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:42,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 499 [2023-11-19 07:40:42,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 146 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:42,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:42,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 499 [2023-11-19 07:40:42,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:47,152 INFO L124 PetriNetUnfolderBase]: 26246/35721 cut-off events. [2023-11-19 07:40:47,153 INFO L125 PetriNetUnfolderBase]: For 40003/40003 co-relation queries the response was YES. [2023-11-19 07:40:47,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76737 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205723 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 22660. Up to 32807 conditions per place. [2023-11-19 07:40:47,428 INFO L140 encePairwiseOnDemand]: 489/499 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-11-19 07:40:47,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 168 flow [2023-11-19 07:40:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:40:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 427 transitions. [2023-11-19 07:40:47,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278557114228457 [2023-11-19 07:40:47,432 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 427 transitions. [2023-11-19 07:40:47,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 427 transitions. [2023-11-19 07:40:47,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:47,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 427 transitions. [2023-11-19 07:40:47,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,439 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 146 flow. Second operand 2 states and 427 transitions. [2023-11-19 07:40:47,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 168 flow [2023-11-19 07:40:47,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 138 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:47,470 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 92 flow [2023-11-19 07:40:47,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-11-19 07:40:47,472 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2023-11-19 07:40:47,472 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 92 flow [2023-11-19 07:40:47,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:47,473 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:47,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:40:47,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-19 07:40:47,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1515092384, now seen corresponding path program 1 times [2023-11-19 07:40:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149156181] [2023-11-19 07:40:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:47,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:47,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:47,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-19 07:40:47,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-19 07:40:47,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-19 07:40:47,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-19 07:40:47,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:40:47,539 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:47,540 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:47,540 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-19 07:40:47,599 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:47,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 616 flow [2023-11-19 07:40:47,692 INFO L124 PetriNetUnfolderBase]: 41/366 cut-off events. [2023-11-19 07:40:47,692 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-19 07:40:47,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 366 events. 41/366 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1118 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-11-19 07:40:47,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 616 flow [2023-11-19 07:40:47,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 616 flow [2023-11-19 07:40:47,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:47,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 616 flow [2023-11-19 07:40:47,705 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 616 flow [2023-11-19 07:40:47,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 616 flow [2023-11-19 07:40:47,793 INFO L124 PetriNetUnfolderBase]: 41/366 cut-off events. [2023-11-19 07:40:47,794 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-19 07:40:47,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 366 events. 41/366 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1118 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-11-19 07:40:47,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 55216