./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/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_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/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_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:34:09,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:34:10,025 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:34:10,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:34:10,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:34:10,058 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:34:10,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:34:10,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:34:10,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:34:10,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:34:10,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:34:10,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:34:10,063 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:34:10,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:34:10,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:34:10,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:34:10,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:34:10,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:34:10,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:34:10,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:34:10,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:34:10,069 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:34:10,069 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:34:10,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:34:10,070 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:34:10,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:34:10,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:34:10,072 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:34:10,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:10,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:34:10,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:34:10,074 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:34:10,075 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:34:10,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:34:10,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:34:10,076 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:34:10,077 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:34:10,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:34:10,078 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:34:10,078 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_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2023-11-19 07:34:10,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:34:10,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:34:10,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:34:10,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:34:10,407 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:34:10,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-19 07:34:13,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:34:13,946 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:34:13,946 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-19 07:34:13,956 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/data/eb24a017e/6c340fb74c8c428080aebdbfff07d6b1/FLAGba23a4084 [2023-11-19 07:34:13,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/data/eb24a017e/6c340fb74c8c428080aebdbfff07d6b1 [2023-11-19 07:34:13,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:34:13,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:34:13,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:13,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:34:13,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:34:13,989 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:13" (1/1) ... [2023-11-19 07:34:13,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b14cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:13, skipping insertion in model container [2023-11-19 07:34:13,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:13" (1/1) ... [2023-11-19 07:34:14,020 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:34:14,207 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_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2023-11-19 07:34:14,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:14,221 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:34:14,242 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_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2023-11-19 07:34:14,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:14,250 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:34:14,251 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:34:14,259 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:34:14,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14 WrapperNode [2023-11-19 07:34:14,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:14,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:14,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:34:14,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:34:14,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,302 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2023-11-19 07:34:14,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:14,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:34:14,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:34:14,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:34:14,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,318 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,318 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,323 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,333 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:34:14,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:34:14,334 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:34:14,334 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:34:14,335 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2023-11-19 07:34:14,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:14,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:34:14,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:34:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:34:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:34:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:34:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:34:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:34:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:34:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:34:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:34:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:34:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:34:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:34:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:34:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:34:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:34:14,408 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 07:34:14,502 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:34:14,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:34:14,777 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:34:14,828 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:34:14,828 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:34:14,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:14 BoogieIcfgContainer [2023-11-19 07:34:14,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:34:14,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:34:14,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:34:14,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:34:14,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:13" (1/3) ... [2023-11-19 07:34:14,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5192e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:14, skipping insertion in model container [2023-11-19 07:34:14,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (2/3) ... [2023-11-19 07:34:14,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5192e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:14, skipping insertion in model container [2023-11-19 07:34:14,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:14" (3/3) ... [2023-11-19 07:34:14,843 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-19 07:34:14,853 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:34:14,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:34:14,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:34:14,865 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:34:14,937 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:34:14,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 184 flow [2023-11-19 07:34:15,033 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-11-19 07:34:15,034 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:34:15,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 6/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-19 07:34:15,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 184 flow [2023-11-19 07:34:15,045 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-11-19 07:34:15,049 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:34:15,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-11-19 07:34:15,063 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-11-19 07:34:15,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-11-19 07:34:15,104 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-11-19 07:34:15,107 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:34:15,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-19 07:34:15,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-19 07:34:17,458 INFO L134 LiptonReduction]: Checked pairs total: 528 [2023-11-19 07:34:17,458 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-11-19 07:34:17,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:17,509 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;@27b53614, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:17,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:34:17,516 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:34:17,516 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:34:17,516 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:34:17,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:17,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:17,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:17,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1391978178, now seen corresponding path program 1 times [2023-11-19 07:34:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162958327] [2023-11-19 07:34:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:17,989 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 07:34:17,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162958327] [2023-11-19 07:34:17,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162958327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:34:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085941559] [2023-11-19 07:34:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:18,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:18,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:18,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-19 07:34:18,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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 07:34:18,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:18,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-19 07:34:18,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:18,157 INFO L124 PetriNetUnfolderBase]: 68/124 cut-off events. [2023-11-19 07:34:18,157 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:34:18,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 124 events. 68/124 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 307 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 200. Up to 64 conditions per place. [2023-11-19 07:34:18,162 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 20 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-11-19 07:34:18,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 125 flow [2023-11-19 07:34:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-19 07:34:18,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2023-11-19 07:34:18,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-19 07:34:18,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-19 07:34:18,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:18,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-19 07:34:18,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 07:34:18,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 07:34:18,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 07:34:18,208 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 246 transitions. [2023-11-19 07:34:18,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 125 flow [2023-11-19 07:34:18,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:34:18,214 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 46 flow [2023-11-19 07:34:18,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-19 07:34:18,221 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-19 07:34:18,221 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 46 flow [2023-11-19 07:34:18,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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 07:34:18,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:18,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:18,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:34:18,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:18,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 579099089, now seen corresponding path program 1 times [2023-11-19 07:34:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:18,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370948754] [2023-11-19 07:34:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:18,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370948754] [2023-11-19 07:34:18,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370948754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:18,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932120957] [2023-11-19 07:34:18,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:18,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 155 [2023-11-19 07:34:18,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 07:34:18,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:18,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 155 [2023-11-19 07:34:18,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:18,577 INFO L124 PetriNetUnfolderBase]: 87/157 cut-off events. [2023-11-19 07:34:18,577 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:34:18,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 157 events. 87/157 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 439 event pairs, 46 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 164. Up to 124 conditions per place. [2023-11-19 07:34:18,580 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:34:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 116 flow [2023-11-19 07:34:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:34:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2023-11-19 07:34:18,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.482258064516129 [2023-11-19 07:34:18,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2023-11-19 07:34:18,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2023-11-19 07:34:18,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:18,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2023-11-19 07:34:18,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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 07:34:18,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 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 07:34:18,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 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 07:34:18,600 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 46 flow. Second operand 4 states and 299 transitions. [2023-11-19 07:34:18,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 116 flow [2023-11-19 07:34:18,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:18,603 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 58 flow [2023-11-19 07:34:18,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-19 07:34:18,605 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-19 07:34:18,606 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 58 flow [2023-11-19 07:34:18,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 07:34:18,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:18,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:18,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:34:18,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:18,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash -648436054, now seen corresponding path program 1 times [2023-11-19 07:34:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699630695] [2023-11-19 07:34:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:19,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:19,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699630695] [2023-11-19 07:34:19,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699630695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163302162] [2023-11-19 07:34:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:19,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:19,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:19,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:19,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:19,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:19,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163302162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:19,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:19,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 2] total 9 [2023-11-19 07:34:19,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743339164] [2023-11-19 07:34:19,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:19,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:34:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:34:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:34:19,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155 [2023-11-19 07:34:19,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 58 flow. Second operand has 11 states, 11 states have (on average 68.54545454545455) internal successors, (754), 11 states have internal predecessors, (754), 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 07:34:19,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:19,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155 [2023-11-19 07:34:19,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:20,072 INFO L124 PetriNetUnfolderBase]: 187/339 cut-off events. [2023-11-19 07:34:20,072 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-11-19 07:34:20,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 339 events. 187/339 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1269 event pairs, 33 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 230. Up to 109 conditions per place. [2023-11-19 07:34:20,082 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 49 selfloop transitions, 16 changer transitions 18/83 dead transitions. [2023-11-19 07:34:20,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 83 transitions, 427 flow [2023-11-19 07:34:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:34:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:34:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 732 transitions. [2023-11-19 07:34:20,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472258064516129 [2023-11-19 07:34:20,086 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 732 transitions. [2023-11-19 07:34:20,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 732 transitions. [2023-11-19 07:34:20,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:20,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 732 transitions. [2023-11-19 07:34:20,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.2) internal successors, (732), 10 states have internal predecessors, (732), 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 07:34:20,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 155.0) internal successors, (1705), 11 states have internal predecessors, (1705), 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 07:34:20,097 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 155.0) internal successors, (1705), 11 states have internal predecessors, (1705), 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 07:34:20,097 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 58 flow. Second operand 10 states and 732 transitions. [2023-11-19 07:34:20,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 83 transitions, 427 flow [2023-11-19 07:34:20,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 83 transitions, 407 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-19 07:34:20,104 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 173 flow [2023-11-19 07:34:20,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=173, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-19 07:34:20,106 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-19 07:34:20,111 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 173 flow [2023-11-19 07:34:20,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 68.54545454545455) internal successors, (754), 11 states have internal predecessors, (754), 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 07:34:20,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:20,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:20,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:20,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:20,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:20,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1968717120, now seen corresponding path program 2 times [2023-11-19 07:34:20,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:20,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123230991] [2023-11-19 07:34:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:20,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123230991] [2023-11-19 07:34:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123230991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:20,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938233250] [2023-11-19 07:34:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:34:20,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:20,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:20,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:34:20,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:34:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:20,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:34:20,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:20,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938233250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:21,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:21,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 13 [2023-11-19 07:34:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131183366] [2023-11-19 07:34:21,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:21,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:34:21,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:34:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:34:21,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155 [2023-11-19 07:34:21,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 173 flow. Second operand has 14 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 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 07:34:21,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:21,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155 [2023-11-19 07:34:21,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:22,013 INFO L124 PetriNetUnfolderBase]: 210/369 cut-off events. [2023-11-19 07:34:22,014 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-11-19 07:34:22,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 369 events. 210/369 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1357 event pairs, 10 based on Foata normal form. 28/397 useless extension candidates. Maximal degree in co-relation 1103. Up to 162 conditions per place. [2023-11-19 07:34:22,018 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 53 selfloop transitions, 38 changer transitions 8/99 dead transitions. [2023-11-19 07:34:22,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 99 transitions, 678 flow [2023-11-19 07:34:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:34:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:34:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1019 transitions. [2023-11-19 07:34:22,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43827956989247313 [2023-11-19 07:34:22,025 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1019 transitions. [2023-11-19 07:34:22,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1019 transitions. [2023-11-19 07:34:22,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:22,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1019 transitions. [2023-11-19 07:34:22,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 67.93333333333334) internal successors, (1019), 15 states have internal predecessors, (1019), 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 07:34:22,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 155.0) internal successors, (2480), 16 states have internal predecessors, (2480), 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 07:34:22,038 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 155.0) internal successors, (2480), 16 states have internal predecessors, (2480), 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 07:34:22,038 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 173 flow. Second operand 15 states and 1019 transitions. [2023-11-19 07:34:22,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 99 transitions, 678 flow [2023-11-19 07:34:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 99 transitions, 651 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:22,048 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 467 flow [2023-11-19 07:34:22,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=467, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-19 07:34:22,049 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-11-19 07:34:22,050 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 467 flow [2023-11-19 07:34:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 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 07:34:22,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:22,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:22,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:22,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:22,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:22,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2133703931, now seen corresponding path program 3 times [2023-11-19 07:34:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:22,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665885203] [2023-11-19 07:34:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:22,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665885203] [2023-11-19 07:34:22,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665885203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457347179] [2023-11-19 07:34:22,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:34:22,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:22,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:22,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:22,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:34:22,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:34:22,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:22,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:34:22,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:22,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457347179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:22,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:22,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:34:22,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285013310] [2023-11-19 07:34:22,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:22,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:34:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:34:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:34:23,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155 [2023-11-19 07:34:23,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 467 flow. Second operand has 13 states, 13 states have (on average 65.15384615384616) internal successors, (847), 13 states have internal predecessors, (847), 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 07:34:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155 [2023-11-19 07:34:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:23,834 INFO L124 PetriNetUnfolderBase]: 282/480 cut-off events. [2023-11-19 07:34:23,834 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2023-11-19 07:34:23,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 480 events. 282/480 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1844 event pairs, 3 based on Foata normal form. 16/496 useless extension candidates. Maximal degree in co-relation 2096. Up to 153 conditions per place. [2023-11-19 07:34:23,841 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 77 selfloop transitions, 62 changer transitions 14/153 dead transitions. [2023-11-19 07:34:23,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 153 transitions, 1335 flow [2023-11-19 07:34:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:34:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:34:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1366 transitions. [2023-11-19 07:34:23,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406451612903226 [2023-11-19 07:34:23,848 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1366 transitions. [2023-11-19 07:34:23,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1366 transitions. [2023-11-19 07:34:23,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:23,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1366 transitions. [2023-11-19 07:34:23,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 68.3) internal successors, (1366), 20 states have internal predecessors, (1366), 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 07:34:23,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 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 07:34:23,864 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 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 07:34:23,865 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 467 flow. Second operand 20 states and 1366 transitions. [2023-11-19 07:34:23,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 153 transitions, 1335 flow [2023-11-19 07:34:23,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 153 transitions, 1193 flow, removed 69 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:23,886 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 811 flow [2023-11-19 07:34:23,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=811, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2023-11-19 07:34:23,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-19 07:34:23,889 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 811 flow [2023-11-19 07:34:23,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.15384615384616) internal successors, (847), 13 states have internal predecessors, (847), 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 07:34:23,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:23,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:23,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:24,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:24,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:24,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1996773033, now seen corresponding path program 4 times [2023-11-19 07:34:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:24,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161418189] [2023-11-19 07:34:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:24,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:24,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161418189] [2023-11-19 07:34:24,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161418189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111312355] [2023-11-19 07:34:24,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:34:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:24,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:24,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:34:24,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:34:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:24,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:34:24,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:24,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111312355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:24,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:24,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:34:24,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896949781] [2023-11-19 07:34:24,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:24,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:34:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:24,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:34:24,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:34:24,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155 [2023-11-19 07:34:24,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 811 flow. Second operand has 14 states, 14 states have (on average 65.07142857142857) internal successors, (911), 14 states have internal predecessors, (911), 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 07:34:24,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:24,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155 [2023-11-19 07:34:24,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:25,839 INFO L124 PetriNetUnfolderBase]: 298/504 cut-off events. [2023-11-19 07:34:25,839 INFO L125 PetriNetUnfolderBase]: For 6593/6593 co-relation queries the response was YES. [2023-11-19 07:34:25,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 504 events. 298/504 cut-off events. For 6593/6593 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1934 event pairs, 5 based on Foata normal form. 22/526 useless extension candidates. Maximal degree in co-relation 2770. Up to 161 conditions per place. [2023-11-19 07:34:25,849 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 94 selfloop transitions, 82 changer transitions 1/177 dead transitions. [2023-11-19 07:34:25,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 177 transitions, 1842 flow [2023-11-19 07:34:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:34:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:34:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1832 transitions. [2023-11-19 07:34:25,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43775388291517325 [2023-11-19 07:34:25,859 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1832 transitions. [2023-11-19 07:34:25,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1832 transitions. [2023-11-19 07:34:25,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:25,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1832 transitions. [2023-11-19 07:34:25,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 67.85185185185185) internal successors, (1832), 27 states have internal predecessors, (1832), 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 07:34:25,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 155.0) internal successors, (4340), 28 states have internal predecessors, (4340), 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 07:34:25,879 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 155.0) internal successors, (4340), 28 states have internal predecessors, (4340), 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 07:34:25,880 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 811 flow. Second operand 27 states and 1832 transitions. [2023-11-19 07:34:25,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 177 transitions, 1842 flow [2023-11-19 07:34:25,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 177 transitions, 1693 flow, removed 70 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:25,909 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 1346 flow [2023-11-19 07:34:25,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1346, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2023-11-19 07:34:25,911 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-11-19 07:34:25,911 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 1346 flow [2023-11-19 07:34:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.07142857142857) internal successors, (911), 14 states have internal predecessors, (911), 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 07:34:25,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:25,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:25,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:26,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:34:26,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:26,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:26,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1812432773, now seen corresponding path program 5 times [2023-11-19 07:34:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:26,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394022131] [2023-11-19 07:34:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:26,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394022131] [2023-11-19 07:34:26,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394022131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:26,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825218575] [2023-11-19 07:34:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:34:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:26,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:26,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:26,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:34:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:26,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:34:26,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:26,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:26,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825218575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:26,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-11-19 07:34:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614179739] [2023-11-19 07:34:26,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:34:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:34:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:34:26,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155 [2023-11-19 07:34:26,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 1346 flow. Second operand has 15 states, 15 states have (on average 66.8) internal successors, (1002), 15 states have internal predecessors, (1002), 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 07:34:26,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:26,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155 [2023-11-19 07:34:26,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:28,221 INFO L124 PetriNetUnfolderBase]: 427/779 cut-off events. [2023-11-19 07:34:28,221 INFO L125 PetriNetUnfolderBase]: For 18934/18934 co-relation queries the response was YES. [2023-11-19 07:34:28,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5118 conditions, 779 events. 427/779 cut-off events. For 18934/18934 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3673 event pairs, 16 based on Foata normal form. 28/807 useless extension candidates. Maximal degree in co-relation 4985. Up to 219 conditions per place. [2023-11-19 07:34:28,238 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 124 selfloop transitions, 122 changer transitions 6/252 dead transitions. [2023-11-19 07:34:28,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 252 transitions, 3043 flow [2023-11-19 07:34:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:34:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:34:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1816 transitions. [2023-11-19 07:34:28,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45062034739454093 [2023-11-19 07:34:28,247 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1816 transitions. [2023-11-19 07:34:28,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1816 transitions. [2023-11-19 07:34:28,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:28,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1816 transitions. [2023-11-19 07:34:28,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 69.84615384615384) internal successors, (1816), 26 states have internal predecessors, (1816), 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 07:34:28,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 155.0) internal successors, (4185), 27 states have internal predecessors, (4185), 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 07:34:28,266 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 155.0) internal successors, (4185), 27 states have internal predecessors, (4185), 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 07:34:28,266 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 1346 flow. Second operand 26 states and 1816 transitions. [2023-11-19 07:34:28,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 252 transitions, 3043 flow [2023-11-19 07:34:28,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 252 transitions, 2624 flow, removed 177 selfloop flow, removed 13 redundant places. [2023-11-19 07:34:28,335 INFO L231 Difference]: Finished difference. Result has 138 places, 170 transitions, 2144 flow [2023-11-19 07:34:28,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2144, PETRI_PLACES=138, PETRI_TRANSITIONS=170} [2023-11-19 07:34:28,337 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-11-19 07:34:28,339 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 170 transitions, 2144 flow [2023-11-19 07:34:28,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.8) internal successors, (1002), 15 states have internal predecessors, (1002), 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 07:34:28,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:28,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:28,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:28,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:34:28,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:28,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -230488799, now seen corresponding path program 6 times [2023-11-19 07:34:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:28,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333652322] [2023-11-19 07:34:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:28,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333652322] [2023-11-19 07:34:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333652322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469445715] [2023-11-19 07:34:28,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:34:28,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:28,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:28,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:34:28,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:34:28,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:28,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:34:28,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:29,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469445715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:29,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:29,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:34:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506799651] [2023-11-19 07:34:29,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:34:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:29,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:34:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:34:29,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155 [2023-11-19 07:34:29,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 170 transitions, 2144 flow. Second operand has 15 states, 15 states have (on average 65.06666666666666) internal successors, (976), 15 states have internal predecessors, (976), 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 07:34:29,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:29,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155 [2023-11-19 07:34:29,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:30,416 INFO L124 PetriNetUnfolderBase]: 590/1080 cut-off events. [2023-11-19 07:34:30,417 INFO L125 PetriNetUnfolderBase]: For 25553/25553 co-relation queries the response was YES. [2023-11-19 07:34:30,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 1080 events. 590/1080 cut-off events. For 25553/25553 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5506 event pairs, 31 based on Foata normal form. 35/1115 useless extension candidates. Maximal degree in co-relation 7622. Up to 661 conditions per place. [2023-11-19 07:34:30,436 INFO L140 encePairwiseOnDemand]: 147/155 looper letters, 186 selfloop transitions, 118 changer transitions 7/311 dead transitions. [2023-11-19 07:34:30,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 311 transitions, 4567 flow [2023-11-19 07:34:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:34:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:34:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1579 transitions. [2023-11-19 07:34:30,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429172510518934 [2023-11-19 07:34:30,445 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1579 transitions. [2023-11-19 07:34:30,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1579 transitions. [2023-11-19 07:34:30,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:30,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1579 transitions. [2023-11-19 07:34:30,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 68.65217391304348) internal successors, (1579), 23 states have internal predecessors, (1579), 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 07:34:30,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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 07:34:30,467 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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 07:34:30,468 INFO L175 Difference]: Start difference. First operand has 138 places, 170 transitions, 2144 flow. Second operand 23 states and 1579 transitions. [2023-11-19 07:34:30,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 311 transitions, 4567 flow [2023-11-19 07:34:30,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 311 transitions, 3676 flow, removed 429 selfloop flow, removed 7 redundant places. [2023-11-19 07:34:30,587 INFO L231 Difference]: Finished difference. Result has 168 places, 246 transitions, 3218 flow [2023-11-19 07:34:30,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3218, PETRI_PLACES=168, PETRI_TRANSITIONS=246} [2023-11-19 07:34:30,590 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-19 07:34:30,590 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 246 transitions, 3218 flow [2023-11-19 07:34:30,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.06666666666666) internal successors, (976), 15 states have internal predecessors, (976), 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 07:34:30,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:30,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:30,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:34:30,797 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:30,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1763242019, now seen corresponding path program 7 times [2023-11-19 07:34:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:30,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51879018] [2023-11-19 07:34:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:30,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:30,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51879018] [2023-11-19 07:34:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51879018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520428779] [2023-11-19 07:34:30,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:34:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:30,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:31,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:34:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:31,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:34:31,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:31,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520428779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:31,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:34:31,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924330401] [2023-11-19 07:34:31,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:31,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:34:31,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:34:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:34:31,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155 [2023-11-19 07:34:31,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 246 transitions, 3218 flow. Second operand has 14 states, 14 states have (on average 65.35714285714286) internal successors, (915), 14 states have internal predecessors, (915), 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 07:34:31,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:31,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155 [2023-11-19 07:34:31,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:32,763 INFO L124 PetriNetUnfolderBase]: 697/1273 cut-off events. [2023-11-19 07:34:32,763 INFO L125 PetriNetUnfolderBase]: For 17695/17695 co-relation queries the response was YES. [2023-11-19 07:34:32,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8597 conditions, 1273 events. 697/1273 cut-off events. For 17695/17695 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6807 event pairs, 25 based on Foata normal form. 22/1295 useless extension candidates. Maximal degree in co-relation 8274. Up to 829 conditions per place. [2023-11-19 07:34:32,788 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 224 selfloop transitions, 135 changer transitions 0/359 dead transitions. [2023-11-19 07:34:32,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 359 transitions, 5093 flow [2023-11-19 07:34:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:34:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:34:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1834 transitions. [2023-11-19 07:34:32,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43823178016726405 [2023-11-19 07:34:32,795 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1834 transitions. [2023-11-19 07:34:32,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1834 transitions. [2023-11-19 07:34:32,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:32,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1834 transitions. [2023-11-19 07:34:32,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 67.92592592592592) internal successors, (1834), 27 states have internal predecessors, (1834), 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 07:34:32,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 155.0) internal successors, (4340), 28 states have internal predecessors, (4340), 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 07:34:32,811 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 155.0) internal successors, (4340), 28 states have internal predecessors, (4340), 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 07:34:32,811 INFO L175 Difference]: Start difference. First operand has 168 places, 246 transitions, 3218 flow. Second operand 27 states and 1834 transitions. [2023-11-19 07:34:32,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 359 transitions, 5093 flow [2023-11-19 07:34:32,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 359 transitions, 4521 flow, removed 280 selfloop flow, removed 2 redundant places. [2023-11-19 07:34:32,970 INFO L231 Difference]: Finished difference. Result has 203 places, 291 transitions, 3869 flow [2023-11-19 07:34:32,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3869, PETRI_PLACES=203, PETRI_TRANSITIONS=291} [2023-11-19 07:34:32,972 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-11-19 07:34:32,972 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 291 transitions, 3869 flow [2023-11-19 07:34:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.35714285714286) internal successors, (915), 14 states have internal predecessors, (915), 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 07:34:32,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:32,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:32,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:33,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:33,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:33,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1694272853, now seen corresponding path program 8 times [2023-11-19 07:34:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:33,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251922178] [2023-11-19 07:34:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:33,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251922178] [2023-11-19 07:34:33,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251922178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292132919] [2023-11-19 07:34:33,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:34:33,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:33,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:33,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:34:33,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:34:33,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:33,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:34:33,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:33,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:33,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292132919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:33,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:33,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:34:33,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267128268] [2023-11-19 07:34:33,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:33,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:34:33,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:33,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:34:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:34:33,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155 [2023-11-19 07:34:33,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 291 transitions, 3869 flow. Second operand has 15 states, 15 states have (on average 66.73333333333333) internal successors, (1001), 15 states have internal predecessors, (1001), 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 07:34:33,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:33,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155 [2023-11-19 07:34:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:35,077 INFO L124 PetriNetUnfolderBase]: 811/1483 cut-off events. [2023-11-19 07:34:35,078 INFO L125 PetriNetUnfolderBase]: For 28658/28658 co-relation queries the response was YES. [2023-11-19 07:34:35,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10798 conditions, 1483 events. 811/1483 cut-off events. For 28658/28658 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8193 event pairs, 162 based on Foata normal form. 24/1507 useless extension candidates. Maximal degree in co-relation 10479. Up to 1039 conditions per place. [2023-11-19 07:34:35,109 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 266 selfloop transitions, 128 changer transitions 3/397 dead transitions. [2023-11-19 07:34:35,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 397 transitions, 6100 flow [2023-11-19 07:34:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:34:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:34:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1613 transitions. [2023-11-19 07:34:35,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45245441795231417 [2023-11-19 07:34:35,114 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1613 transitions. [2023-11-19 07:34:35,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1613 transitions. [2023-11-19 07:34:35,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:35,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1613 transitions. [2023-11-19 07:34:35,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 70.1304347826087) internal successors, (1613), 23 states have internal predecessors, (1613), 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 07:34:35,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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 07:34:35,128 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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 07:34:35,129 INFO L175 Difference]: Start difference. First operand has 203 places, 291 transitions, 3869 flow. Second operand 23 states and 1613 transitions. [2023-11-19 07:34:35,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 397 transitions, 6100 flow [2023-11-19 07:34:35,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 397 transitions, 5360 flow, removed 328 selfloop flow, removed 11 redundant places. [2023-11-19 07:34:35,346 INFO L231 Difference]: Finished difference. Result has 225 places, 332 transitions, 4483 flow [2023-11-19 07:34:35,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4483, PETRI_PLACES=225, PETRI_TRANSITIONS=332} [2023-11-19 07:34:35,348 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2023-11-19 07:34:35,348 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 332 transitions, 4483 flow [2023-11-19 07:34:35,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.73333333333333) internal successors, (1001), 15 states have internal predecessors, (1001), 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 07:34:35,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:35,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:35,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:34:35,563 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:34:35,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1717775350, now seen corresponding path program 9 times [2023-11-19 07:34:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420081085] [2023-11-19 07:34:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:36,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420081085] [2023-11-19 07:34:36,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420081085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902521958] [2023-11-19 07:34:36,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:34:36,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:36,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:36,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:36,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:34:36,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:34:36,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:36,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:34:36,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:39,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902521958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:50,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:50,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2023-11-19 07:34:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916504215] [2023-11-19 07:34:50,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:34:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:34:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=251, Unknown=3, NotChecked=0, Total=342 [2023-11-19 07:34:52,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:34:54,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:34:56,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:34:59,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:35:01,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:35:01,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 155 [2023-11-19 07:35:01,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 332 transitions, 4483 flow. Second operand has 19 states, 19 states have (on average 60.421052631578945) internal successors, (1148), 19 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 07:35:01,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:01,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 155 [2023-11-19 07:35:01,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:04,889 INFO L124 PetriNetUnfolderBase]: 1149/2206 cut-off events. [2023-11-19 07:35:04,889 INFO L125 PetriNetUnfolderBase]: For 41095/41095 co-relation queries the response was YES. [2023-11-19 07:35:04,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16132 conditions, 2206 events. 1149/2206 cut-off events. For 41095/41095 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14189 event pairs, 44 based on Foata normal form. 6/2212 useless extension candidates. Maximal degree in co-relation 15727. Up to 995 conditions per place. [2023-11-19 07:35:04,936 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 298 selfloop transitions, 164 changer transitions 77/539 dead transitions. [2023-11-19 07:35:04,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 539 transitions, 8411 flow [2023-11-19 07:35:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:35:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:35:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1104 transitions. [2023-11-19 07:35:04,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41897533206831117 [2023-11-19 07:35:04,939 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1104 transitions. [2023-11-19 07:35:04,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1104 transitions. [2023-11-19 07:35:04,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:04,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1104 transitions. [2023-11-19 07:35:04,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.94117647058823) internal successors, (1104), 17 states have internal predecessors, (1104), 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 07:35:04,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 155.0) internal successors, (2790), 18 states have internal predecessors, (2790), 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 07:35:04,958 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 155.0) internal successors, (2790), 18 states have internal predecessors, (2790), 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 07:35:04,966 INFO L175 Difference]: Start difference. First operand has 225 places, 332 transitions, 4483 flow. Second operand 17 states and 1104 transitions. [2023-11-19 07:35:04,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 539 transitions, 8411 flow [2023-11-19 07:35:05,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 539 transitions, 7928 flow, removed 156 selfloop flow, removed 10 redundant places. [2023-11-19 07:35:05,259 INFO L231 Difference]: Finished difference. Result has 243 places, 383 transitions, 5798 flow [2023-11-19 07:35:05,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=4166, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5798, PETRI_PLACES=243, PETRI_TRANSITIONS=383} [2023-11-19 07:35:05,260 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-11-19 07:35:05,260 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 383 transitions, 5798 flow [2023-11-19 07:35:05,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.421052631578945) internal successors, (1148), 19 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 07:35:05,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:05,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:05,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:05,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:05,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1344279450, now seen corresponding path program 10 times [2023-11-19 07:35:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:05,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722472505] [2023-11-19 07:35:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:05,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722472505] [2023-11-19 07:35:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722472505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274808112] [2023-11-19 07:35:05,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:05,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:05,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:05,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3725bda0-17a1-4b8f-9f43-2a11d0cca12a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)