./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_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_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/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_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/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_593d2164-fb0a-48b5-9711-e6a9add6bb01/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 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:56:27,999 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:28,100 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:56:28,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:28,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:28,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:28,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:28,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:28,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:28,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:28,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:28,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:28,166 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:28,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:28,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:28,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:28,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:56:28,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:28,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:28,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:28,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:28,172 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:28,173 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:28,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:28,174 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:28,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:28,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:28,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:28,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:28,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:28,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:28,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:28,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:56:28,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:56:28,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:28,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:28,181 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:28,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:28,181 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:28,182 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_593d2164-fb0a-48b5-9711-e6a9add6bb01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2023-11-19 07:56:28,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:28,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:28,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:28,554 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:28,555 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:28,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2023-11-19 07:56:31,609 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:32,036 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:32,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2023-11-19 07:56:32,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/data/661620827/05587a044a3744e382cd4bb53a17b13e/FLAG28a7d8bd9 [2023-11-19 07:56:32,069 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/data/661620827/05587a044a3744e382cd4bb53a17b13e [2023-11-19 07:56:32,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:32,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:32,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:32,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:32,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:32,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,089 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b102575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32, skipping insertion in model container [2023-11-19 07:56:32,089 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:32,331 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:56:32,477 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_593d2164-fb0a-48b5-9711-e6a9add6bb01/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2023-11-19 07:56:32,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:32,498 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:32,514 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:56:32,536 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_593d2164-fb0a-48b5-9711-e6a9add6bb01/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2023-11-19 07:56:32,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:32,574 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:32,574 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:32,574 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:32,582 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:32,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32 WrapperNode [2023-11-19 07:56:32,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:32,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:32,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:32,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:32,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,640 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2023-11-19 07:56:32,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:32,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:32,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:32,642 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:32,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,669 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,685 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:32,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:32,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:32,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:32,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (1/1) ... [2023-11-19 07:56:32,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:32,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:32,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:32,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593d2164-fb0a-48b5-9711-e6a9add6bb01/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:56:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:56:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:56:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:56:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:56:32,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:56:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:32,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:56:32,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:32,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:32,807 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 07:56:32,953 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:32,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:33,171 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:33,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:33,265 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:56:33,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:33 BoogieIcfgContainer [2023-11-19 07:56:33,269 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:33,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:33,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:33,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:33,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:32" (1/3) ... [2023-11-19 07:56:33,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127cb4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:33, skipping insertion in model container [2023-11-19 07:56:33,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:32" (2/3) ... [2023-11-19 07:56:33,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127cb4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:33, skipping insertion in model container [2023-11-19 07:56:33,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:33" (3/3) ... [2023-11-19 07:56:33,279 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-11-19 07:56:33,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:56:33,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:33,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:33,302 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:56:33,350 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:56:33,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 136 flow [2023-11-19 07:56:33,432 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-11-19 07:56:33,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:33,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 5/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-11-19 07:56:33,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 136 flow [2023-11-19 07:56:33,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 66 transitions, 136 flow [2023-11-19 07:56:33,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:33,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 66 transitions, 136 flow [2023-11-19 07:56:33,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 66 transitions, 136 flow [2023-11-19 07:56:33,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 136 flow [2023-11-19 07:56:33,486 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-11-19 07:56:33,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:33,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 5/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-11-19 07:56:33,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 1120 [2023-11-19 07:56:35,521 INFO L134 LiptonReduction]: Checked pairs total: 891 [2023-11-19 07:56:35,521 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-11-19 07:56:35,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:35,555 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;@54b59789, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:35,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:56:35,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:35,561 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:56:35,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:35,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:35,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:56:35,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:35,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash 10627269, now seen corresponding path program 1 times [2023-11-19 07:56:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:35,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620783136] [2023-11-19 07:56:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:35,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:35,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620783136] [2023-11-19 07:56:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620783136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:35,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:35,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:35,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202619183] [2023-11-19 07:56:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:35,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:35,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-19 07:56:35,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:35,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:35,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-19 07:56:35,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:35,953 INFO L124 PetriNetUnfolderBase]: 7/20 cut-off events. [2023-11-19 07:56:35,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:35,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 2 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2023-11-19 07:56:35,956 INFO L140 encePairwiseOnDemand]: 127/131 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2023-11-19 07:56:35,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 42 flow [2023-11-19 07:56:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-11-19 07:56:35,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45038167938931295 [2023-11-19 07:56:35,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-11-19 07:56:35,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-11-19 07:56:35,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:35,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-11-19 07:56:35,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:35,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:35,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:35,989 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 3 states and 177 transitions. [2023-11-19 07:56:35,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 42 flow [2023-11-19 07:56:35,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:35,994 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 24 flow [2023-11-19 07:56:35,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-11-19 07:56:36,000 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2023-11-19 07:56:36,000 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 24 flow [2023-11-19 07:56:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:36,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:36,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:56:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:36,002 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 07:56:36,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1622834126, now seen corresponding path program 1 times [2023-11-19 07:56:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:36,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229455410] [2023-11-19 07:56:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:36,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:36,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:36,076 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:56:36,077 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 07:56:36,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 07:56:36,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 07:56:36,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:36,080 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:56:36,083 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:56:36,083 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:56:36,117 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:56:36,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 107 transitions, 224 flow [2023-11-19 07:56:36,164 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-11-19 07:56:36,164 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:36,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-11-19 07:56:36,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 107 transitions, 224 flow [2023-11-19 07:56:36,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 107 transitions, 224 flow [2023-11-19 07:56:36,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:36,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 107 transitions, 224 flow [2023-11-19 07:56:36,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 107 transitions, 224 flow [2023-11-19 07:56:36,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 107 transitions, 224 flow [2023-11-19 07:56:36,194 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-11-19 07:56:36,194 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:36,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-11-19 07:56:36,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 5520 [2023-11-19 07:56:38,478 INFO L134 LiptonReduction]: Checked pairs total: 7092 [2023-11-19 07:56:38,478 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-11-19 07:56:38,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:38,482 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;@54b59789, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:38,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:56:38,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:38,485 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-19 07:56:38,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:38,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:38,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:56:38,486 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 07:56:38,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 18447982, now seen corresponding path program 1 times [2023-11-19 07:56:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:38,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546713920] [2023-11-19 07:56:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:38,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:38,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546713920] [2023-11-19 07:56:38,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546713920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:38,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:38,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:38,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041115395] [2023-11-19 07:56:38,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:38,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:38,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:38,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:38,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 212 [2023-11-19 07:56:38,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:38,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:38,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 212 [2023-11-19 07:56:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:38,708 INFO L124 PetriNetUnfolderBase]: 170/306 cut-off events. [2023-11-19 07:56:38,708 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 07:56:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 306 events. 170/306 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1261 event pairs, 72 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 298. Up to 148 conditions per place. [2023-11-19 07:56:38,713 INFO L140 encePairwiseOnDemand]: 204/212 looper letters, 31 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-19 07:56:38,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 37 transitions, 157 flow [2023-11-19 07:56:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-11-19 07:56:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2023-11-19 07:56:38,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-11-19 07:56:38,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-11-19 07:56:38,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:38,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-11-19 07:56:38,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:38,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:38,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:38,726 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 62 flow. Second operand 3 states and 306 transitions. [2023-11-19 07:56:38,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 37 transitions, 157 flow [2023-11-19 07:56:38,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 157 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:38,728 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 77 flow [2023-11-19 07:56:38,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-19 07:56:38,730 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-19 07:56:38,730 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 77 flow [2023-11-19 07:56:38,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:38,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:38,731 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:56:38,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:38,732 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 07:56:38,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1711714674, now seen corresponding path program 1 times [2023-11-19 07:56:38,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:38,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910167514] [2023-11-19 07:56:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:38,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:38,751 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:38,766 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:38,767 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:56:38,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:56:38,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:56:38,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:56:38,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:56:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:56:38,769 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:56:38,770 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:56:38,770 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:56:38,800 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:56:38,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 148 transitions, 314 flow [2023-11-19 07:56:38,857 INFO L124 PetriNetUnfolderBase]: 13/185 cut-off events. [2023-11-19 07:56:38,857 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:56:38,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 13/185 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 447 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2023-11-19 07:56:38,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 148 transitions, 314 flow [2023-11-19 07:56:38,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 148 transitions, 314 flow [2023-11-19 07:56:38,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:38,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 148 transitions, 314 flow [2023-11-19 07:56:38,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 148 transitions, 314 flow [2023-11-19 07:56:38,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 148 transitions, 314 flow [2023-11-19 07:56:38,926 INFO L124 PetriNetUnfolderBase]: 13/185 cut-off events. [2023-11-19 07:56:38,926 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:56:38,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 13/185 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 447 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2023-11-19 07:56:38,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-11-19 07:56:41,772 INFO L134 LiptonReduction]: Checked pairs total: 16263 [2023-11-19 07:56:41,772 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-11-19 07:56:41,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:41,776 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;@54b59789, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:41,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:56:41,778 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:41,778 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:56:41,778 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:41,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:41,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:56:41,779 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 07:56:41,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 28259593, now seen corresponding path program 1 times [2023-11-19 07:56:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:41,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877315575] [2023-11-19 07:56:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:41,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877315575] [2023-11-19 07:56:41,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877315575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:41,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:41,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169229453] [2023-11-19 07:56:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:41,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:41,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 287 [2023-11-19 07:56:41,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 287 [2023-11-19 07:56:41,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:42,432 INFO L124 PetriNetUnfolderBase]: 2262/3296 cut-off events. [2023-11-19 07:56:42,434 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2023-11-19 07:56:42,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6762 conditions, 3296 events. 2262/3296 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16706 event pairs, 770 based on Foata normal form. 0/2741 useless extension candidates. Maximal degree in co-relation 1306. Up to 2179 conditions per place. [2023-11-19 07:56:42,464 INFO L140 encePairwiseOnDemand]: 276/287 looper letters, 46 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-11-19 07:56:42,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 236 flow [2023-11-19 07:56:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-11-19 07:56:42,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4924506387921022 [2023-11-19 07:56:42,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-11-19 07:56:42,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-11-19 07:56:42,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:42,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-11-19 07:56:42,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,489 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 3 states and 424 transitions. [2023-11-19 07:56:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 236 flow [2023-11-19 07:56:42,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 232 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:42,495 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 110 flow [2023-11-19 07:56:42,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-11-19 07:56:42,498 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-11-19 07:56:42,498 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 110 flow [2023-11-19 07:56:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:42,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:42,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:56:42,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:56:42,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:42,502 INFO L85 PathProgramCache]: Analyzing trace with hash -235432931, now seen corresponding path program 1 times [2023-11-19 07:56:42,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:42,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536683546] [2023-11-19 07:56:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536683546] [2023-11-19 07:56:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536683546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:42,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:42,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:42,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660236639] [2023-11-19 07:56:42,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:42,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:42,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:42,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 287 [2023-11-19 07:56:42,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:42,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 287 [2023-11-19 07:56:42,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:43,015 INFO L124 PetriNetUnfolderBase]: 1926/2820 cut-off events. [2023-11-19 07:56:43,016 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-19 07:56:43,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 2820 events. 1926/2820 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13423 event pairs, 1530 based on Foata normal form. 152/2931 useless extension candidates. Maximal degree in co-relation 3534. Up to 2726 conditions per place. [2023-11-19 07:56:43,080 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 28 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-19 07:56:43,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 156 flow [2023-11-19 07:56:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-19 07:56:43,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-11-19 07:56:43,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-19 07:56:43,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-19 07:56:43,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:43,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-19 07:56:43,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,090 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 110 flow. Second operand 3 states and 392 transitions. [2023-11-19 07:56:43,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 156 flow [2023-11-19 07:56:43,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:43,095 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 96 flow [2023-11-19 07:56:43,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-19 07:56:43,099 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-11-19 07:56:43,099 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 96 flow [2023-11-19 07:56:43,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:43,100 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:56:43,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:56:43,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:56:43,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -292883861, now seen corresponding path program 1 times [2023-11-19 07:56:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:43,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419414094] [2023-11-19 07:56:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:43,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:43,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:43,164 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:43,164 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:56:43,165 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:56:43,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:56:43,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:56:43,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:56:43,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:56:43,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:56:43,168 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:56:43,169 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:56:43,169 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:56:43,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:56:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 189 transitions, 406 flow [2023-11-19 07:56:43,261 INFO L124 PetriNetUnfolderBase]: 17/239 cut-off events. [2023-11-19 07:56:43,261 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:56:43,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 239 events. 17/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 685 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 193. Up to 10 conditions per place. [2023-11-19 07:56:43,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 189 transitions, 406 flow [2023-11-19 07:56:43,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 189 transitions, 406 flow [2023-11-19 07:56:43,268 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:43,268 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 189 transitions, 406 flow [2023-11-19 07:56:43,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 189 transitions, 406 flow [2023-11-19 07:56:43,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 189 transitions, 406 flow [2023-11-19 07:56:43,303 INFO L124 PetriNetUnfolderBase]: 17/239 cut-off events. [2023-11-19 07:56:43,304 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:56:43,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 239 events. 17/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 685 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 193. Up to 10 conditions per place. [2023-11-19 07:56:43,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 24160 [2023-11-19 07:56:46,891 INFO L134 LiptonReduction]: Checked pairs total: 30410 [2023-11-19 07:56:46,892 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-11-19 07:56:46,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:46,900 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;@54b59789, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:46,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:56:46,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:46,903 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-19 07:56:46,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:46,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:46,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:56:46,905 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 07:56:46,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:46,906 INFO L85 PathProgramCache]: Analyzing trace with hash 41240105, now seen corresponding path program 1 times [2023-11-19 07:56:46,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:46,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012421238] [2023-11-19 07:56:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012421238] [2023-11-19 07:56:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012421238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:46,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:46,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:46,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563358542] [2023-11-19 07:56:46,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:46,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:46,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:46,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 380 [2023-11-19 07:56:46,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:46,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 380 [2023-11-19 07:56:46,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:50,622 INFO L124 PetriNetUnfolderBase]: 22735/29951 cut-off events. [2023-11-19 07:56:50,622 INFO L125 PetriNetUnfolderBase]: For 4525/4525 co-relation queries the response was YES. [2023-11-19 07:56:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61633 conditions, 29951 events. 22735/29951 cut-off events. For 4525/4525 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 166381 event pairs, 6369 based on Foata normal form. 0/24069 useless extension candidates. Maximal degree in co-relation 6003. Up to 24129 conditions per place. [2023-11-19 07:56:50,894 INFO L140 encePairwiseOnDemand]: 367/380 looper letters, 59 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-11-19 07:56:50,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 67 transitions, 311 flow [2023-11-19 07:56:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-11-19 07:56:50,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47192982456140353 [2023-11-19 07:56:50,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-11-19 07:56:50,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-11-19 07:56:50,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:50,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-11-19 07:56:50,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,907 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 116 flow. Second operand 3 states and 538 transitions. [2023-11-19 07:56:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 67 transitions, 311 flow [2023-11-19 07:56:50,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 299 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:50,915 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 141 flow [2023-11-19 07:56:50,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-11-19 07:56:50,917 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-19 07:56:50,920 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 141 flow [2023-11-19 07:56:50,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:50,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:56:50,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:56:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash 686459379, now seen corresponding path program 1 times [2023-11-19 07:56:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238168184] [2023-11-19 07:56:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:51,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:51,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238168184] [2023-11-19 07:56:51,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238168184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:51,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:51,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:51,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15789559] [2023-11-19 07:56:51,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:51,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:51,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:51,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 380 [2023-11-19 07:56:51,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:51,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 380 [2023-11-19 07:56:51,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:53,482 INFO L124 PetriNetUnfolderBase]: 16381/21805 cut-off events. [2023-11-19 07:56:53,483 INFO L125 PetriNetUnfolderBase]: For 4926/4926 co-relation queries the response was YES. [2023-11-19 07:56:53,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47813 conditions, 21805 events. 16381/21805 cut-off events. For 4926/4926 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 113054 event pairs, 12859 based on Foata normal form. 1744/23275 useless extension candidates. Maximal degree in co-relation 27418. Up to 21199 conditions per place. [2023-11-19 07:56:53,644 INFO L140 encePairwiseOnDemand]: 375/380 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 07:56:53,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 199 flow [2023-11-19 07:56:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-11-19 07:56:53,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437719298245614 [2023-11-19 07:56:53,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-11-19 07:56:53,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-11-19 07:56:53,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:53,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-11-19 07:56:53,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,658 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 141 flow. Second operand 3 states and 499 transitions. [2023-11-19 07:56:53,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 199 flow [2023-11-19 07:56:53,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:53,666 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 122 flow [2023-11-19 07:56:53,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-19 07:56:53,667 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-11-19 07:56:53,668 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 122 flow [2023-11-19 07:56:53,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:53,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:53,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:56:53,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:56:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash 52297989, now seen corresponding path program 1 times [2023-11-19 07:56:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296026480] [2023-11-19 07:56:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:53,689 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:56:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:56:53,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:56:53,718 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:56:53,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:56:53,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:56:53,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 07:56:53,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:56:53,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:56:53,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:56:53,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:56:53,721 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:56:53,722 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:56:53,722 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 07:56:53,776 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:56:53,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 230 transitions, 500 flow [2023-11-19 07:56:53,851 INFO L124 PetriNetUnfolderBase]: 21/293 cut-off events. [2023-11-19 07:56:53,852 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:56:53,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 293 events. 21/293 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 927 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2023-11-19 07:56:53,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 230 transitions, 500 flow [2023-11-19 07:56:53,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 230 transitions, 500 flow [2023-11-19 07:56:53,861 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:53,861 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 230 transitions, 500 flow [2023-11-19 07:56:53,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 230 transitions, 500 flow [2023-11-19 07:56:53,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 230 transitions, 500 flow [2023-11-19 07:56:53,926 INFO L124 PetriNetUnfolderBase]: 21/293 cut-off events. [2023-11-19 07:56:53,927 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:56:53,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 293 events. 21/293 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 927 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2023-11-19 07:56:53,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 38400 [2023-11-19 07:56:58,460 INFO L134 LiptonReduction]: Checked pairs total: 47369 [2023-11-19 07:56:58,461 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-19 07:56:58,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:58,464 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;@54b59789, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:58,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:56:58,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:58,465 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:56:58,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:56:58,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:58,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:56:58,466 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 07:56:58,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash 56817336, now seen corresponding path program 1 times [2023-11-19 07:56:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:58,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031302772] [2023-11-19 07:56:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031302772] [2023-11-19 07:56:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031302772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:58,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:58,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623336857] [2023-11-19 07:56:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:58,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 460 [2023-11-19 07:56:58,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:58,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:58,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 460 [2023-11-19 07:56:58,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand