./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-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_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/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_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/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_0c794ef9-c949-4352-aa10-d96658cba277/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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:19,066 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:19,198 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:19,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:19,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:19,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:19,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:19,250 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:19,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:19,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:19,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:19,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:19,259 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:19,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:19,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:19,261 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:19,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:19,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:19,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:19,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:19,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:19,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:19,266 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:19,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:19,267 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:19,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:19,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:19,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:19,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:19,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:19,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:19,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:19,273 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:19,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:19,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:19,274 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:19,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:19,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:19,275 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:19,275 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_0c794ef9-c949-4352-aa10-d96658cba277/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2023-11-19 07:40:19,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:19,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:19,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:19,584 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:19,584 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:19,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-19 07:40:22,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:22,914 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:22,914 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-19 07:40:22,925 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/data/340b6d566/d38b83574cc54ee19344c396f8445cb0/FLAG104c7cc87 [2023-11-19 07:40:22,940 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/data/340b6d566/d38b83574cc54ee19344c396f8445cb0 [2023-11-19 07:40:22,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:22,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:22,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:22,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:22,952 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:22,953 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:22" (1/1) ... [2023-11-19 07:40:22,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265355f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:22, skipping insertion in model container [2023-11-19 07:40:22,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:22" (1/1) ... [2023-11-19 07:40:22,999 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:23,204 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_0c794ef9-c949-4352-aa10-d96658cba277/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-19 07:40:23,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:23,238 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:23,269 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_0c794ef9-c949-4352-aa10-d96658cba277/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-19 07:40:23,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:23,284 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:23,284 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:23,298 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:23,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23 WrapperNode [2023-11-19 07:40:23,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:23,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:23,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:23,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:23,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,390 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 331 [2023-11-19 07:40:23,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:23,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:23,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:23,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:23,401 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,417 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,429 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:23,449 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:23,449 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:23,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:23,450 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (1/1) ... [2023-11-19 07:40:23,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:23,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:23,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:23,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:40:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:40:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:40:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:40:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:40:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:40:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:40:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 07:40:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 07:40:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:40:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:40:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:40:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:23,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:23,534 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:40:23,669 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:23,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:24,241 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:24,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:24,565 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:40:24,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:24 BoogieIcfgContainer [2023-11-19 07:40:24,579 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:24,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:24,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:24,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:24,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:22" (1/3) ... [2023-11-19 07:40:24,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7b7486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:24, skipping insertion in model container [2023-11-19 07:40:24,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:23" (2/3) ... [2023-11-19 07:40:24,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7b7486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:24, skipping insertion in model container [2023-11-19 07:40:24,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:24" (3/3) ... [2023-11-19 07:40:24,589 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-11-19 07:40:24,599 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:40:24,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:24,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:40:24,611 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:24,703 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:40:24,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 258 transitions, 544 flow [2023-11-19 07:40:24,897 INFO L124 PetriNetUnfolderBase]: 19/254 cut-off events. [2023-11-19 07:40:24,897 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:40:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 254 events. 19/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2023-11-19 07:40:24,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 258 transitions, 544 flow [2023-11-19 07:40:24,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 241 transitions, 506 flow [2023-11-19 07:40:24,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:24,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 241 transitions, 506 flow [2023-11-19 07:40:24,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 241 transitions, 506 flow [2023-11-19 07:40:24,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 241 transitions, 506 flow [2023-11-19 07:40:25,035 INFO L124 PetriNetUnfolderBase]: 19/241 cut-off events. [2023-11-19 07:40:25,035 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:40:25,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 241 events. 19/241 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2023-11-19 07:40:25,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-19 07:40:36,437 INFO L134 LiptonReduction]: Checked pairs total: 3215 [2023-11-19 07:40:36,438 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-11-19 07:40:36,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:36,460 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;@58c9543d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:36,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:40:36,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:36,469 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-11-19 07:40:36,469 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:40:36,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:36,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:36,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:36,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1474123186, now seen corresponding path program 1 times [2023-11-19 07:40:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:36,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753018662] [2023-11-19 07:40:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753018662] [2023-11-19 07:40:37,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753018662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:37,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:37,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:40:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149277488] [2023-11-19 07:40:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:37,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:37,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:37,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 509 [2023-11-19 07:40:37,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:37,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 509 [2023-11-19 07:40:37,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:38,246 INFO L124 PetriNetUnfolderBase]: 1799/2452 cut-off events. [2023-11-19 07:40:38,246 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-19 07:40:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 2452 events. 1799/2452 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9502 event pairs, 199 based on Foata normal form. 0/1840 useless extension candidates. Maximal degree in co-relation 4806. Up to 1553 conditions per place. [2023-11-19 07:40:38,278 INFO L140 encePairwiseOnDemand]: 504/509 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-11-19 07:40:38,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 310 flow [2023-11-19 07:40:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1197 transitions. [2023-11-19 07:40:38,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47033398821218075 [2023-11-19 07:40:38,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1197 transitions. [2023-11-19 07:40:38,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1197 transitions. [2023-11-19 07:40:38,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:38,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1197 transitions. [2023-11-19 07:40:38,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.4) internal successors, (1197), 5 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,337 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,339 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 5 states and 1197 transitions. [2023-11-19 07:40:38,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 310 flow [2023-11-19 07:40:38,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 282 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 07:40:38,349 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 94 flow [2023-11-19 07:40:38,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-19 07:40:38,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-19 07:40:38,356 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 94 flow [2023-11-19 07:40:38,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:38,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:38,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:38,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:38,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1123758089, now seen corresponding path program 1 times [2023-11-19 07:40:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753266791] [2023-11-19 07:40:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:38,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753266791] [2023-11-19 07:40:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753266791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:38,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:38,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288812351] [2023-11-19 07:40:38,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:38,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:38,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 509 [2023-11-19 07:40:38,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:38,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 509 [2023-11-19 07:40:38,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:39,165 INFO L124 PetriNetUnfolderBase]: 2374/3227 cut-off events. [2023-11-19 07:40:39,165 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-11-19 07:40:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7136 conditions, 3227 events. 2374/3227 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11500 event pairs, 1822 based on Foata normal form. 98/2613 useless extension candidates. Maximal degree in co-relation 3186. Up to 2423 conditions per place. [2023-11-19 07:40:39,190 INFO L140 encePairwiseOnDemand]: 502/509 looper letters, 33 selfloop transitions, 2 changer transitions 22/59 dead transitions. [2023-11-19 07:40:39,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 265 flow [2023-11-19 07:40:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1148 transitions. [2023-11-19 07:40:39,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108055009823184 [2023-11-19 07:40:39,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1148 transitions. [2023-11-19 07:40:39,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1148 transitions. [2023-11-19 07:40:39,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:39,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1148 transitions. [2023-11-19 07:40:39,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.6) internal successors, (1148), 5 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 07:40:39,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,216 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 94 flow. Second operand 5 states and 1148 transitions. [2023-11-19 07:40:39,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 265 flow [2023-11-19 07:40:39,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 252 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:39,226 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 106 flow [2023-11-19 07:40:39,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-19 07:40:39,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-11-19 07:40:39,228 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 106 flow [2023-11-19 07:40:39,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:39,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:39,230 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:39,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1228634178, now seen corresponding path program 1 times [2023-11-19 07:40:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:39,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552635004] [2023-11-19 07:40:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:39,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:39,603 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 07:40:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:39,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552635004] [2023-11-19 07:40:39,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552635004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:39,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377846688] [2023-11-19 07:40:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:39,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:39,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:39,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:39,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:40:39,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:40,066 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 07:40:40,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:40,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377846688] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:40,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:40,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2023-11-19 07:40:40,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335444894] [2023-11-19 07:40:40,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:40,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:40,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:40:40,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 509 [2023-11-19 07:40:40,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:40,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:40,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 509 [2023-11-19 07:40:40,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:41,144 INFO L124 PetriNetUnfolderBase]: 3225/4317 cut-off events. [2023-11-19 07:40:41,144 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2023-11-19 07:40:41,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9903 conditions, 4317 events. 3225/4317 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17304 event pairs, 143 based on Foata normal form. 92/3603 useless extension candidates. Maximal degree in co-relation 9889. Up to 1337 conditions per place. [2023-11-19 07:40:41,181 INFO L140 encePairwiseOnDemand]: 501/509 looper letters, 100 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2023-11-19 07:40:41,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 114 transitions, 526 flow [2023-11-19 07:40:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:40:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1630 transitions. [2023-11-19 07:40:41,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574796519786697 [2023-11-19 07:40:41,188 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1630 transitions. [2023-11-19 07:40:41,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1630 transitions. [2023-11-19 07:40:41,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:41,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1630 transitions. [2023-11-19 07:40:41,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.85714285714286) internal successors, (1630), 7 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:41,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 509.0) internal successors, (4072), 8 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:41,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 509.0) internal successors, (4072), 8 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:41,208 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 106 flow. Second operand 7 states and 1630 transitions. [2023-11-19 07:40:41,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 114 transitions, 526 flow [2023-11-19 07:40:41,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 114 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:41,215 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 193 flow [2023-11-19 07:40:41,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:40:41,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-11-19 07:40:41,218 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 193 flow [2023-11-19 07:40:41,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:41,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:41,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:41,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:41,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:41,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:41,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1782110852, now seen corresponding path program 2 times [2023-11-19 07:40:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:41,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599691252] [2023-11-19 07:40:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:41,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:41,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599691252] [2023-11-19 07:40:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599691252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:41,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:41,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:40:41,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568361486] [2023-11-19 07:40:41,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:41,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:41,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:41,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 509 [2023-11-19 07:40:41,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:41,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:41,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 509 [2023-11-19 07:40:41,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:42,818 INFO L124 PetriNetUnfolderBase]: 4227/5655 cut-off events. [2023-11-19 07:40:42,819 INFO L125 PetriNetUnfolderBase]: For 4516/4516 co-relation queries the response was YES. [2023-11-19 07:40:42,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16538 conditions, 5655 events. 4227/5655 cut-off events. For 4516/4516 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23053 event pairs, 501 based on Foata normal form. 152/5074 useless extension candidates. Maximal degree in co-relation 16516. Up to 4027 conditions per place. [2023-11-19 07:40:42,928 INFO L140 encePairwiseOnDemand]: 502/509 looper letters, 83 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2023-11-19 07:40:42,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 538 flow [2023-11-19 07:40:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:40:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1414 transitions. [2023-11-19 07:40:42,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629993451211526 [2023-11-19 07:40:42,935 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1414 transitions. [2023-11-19 07:40:42,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1414 transitions. [2023-11-19 07:40:42,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:42,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1414 transitions. [2023-11-19 07:40:42,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.66666666666666) internal successors, (1414), 6 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:42,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 509.0) internal successors, (3563), 7 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:42,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 509.0) internal successors, (3563), 7 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:42,950 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 193 flow. Second operand 6 states and 1414 transitions. [2023-11-19 07:40:42,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 538 flow [2023-11-19 07:40:43,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 515 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:43,008 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 247 flow [2023-11-19 07:40:43,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-11-19 07:40:43,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-11-19 07:40:43,010 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 247 flow [2023-11-19 07:40:43,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:43,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:43,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:43,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:40:43,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:43,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1002067457, now seen corresponding path program 1 times [2023-11-19 07:40:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76083376] [2023-11-19 07:40:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:45,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76083376] [2023-11-19 07:40:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76083376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703937845] [2023-11-19 07:40:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:45,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:45,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:45,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:45,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:40:45,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:45,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-19 07:40:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:45,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:45,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:45,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-19 07:40:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:45,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703937845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:45,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:45,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2023-11-19 07:40:45,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947246419] [2023-11-19 07:40:45,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:45,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:40:45,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:40:45,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:40:47,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 509 [2023-11-19 07:40:47,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 247 flow. Second operand has 16 states, 16 states have (on average 195.3125) internal successors, (3125), 16 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:47,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 509 [2023-11-19 07:40:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:50,180 INFO L124 PetriNetUnfolderBase]: 7180/9797 cut-off events. [2023-11-19 07:40:50,180 INFO L125 PetriNetUnfolderBase]: For 11159/11309 co-relation queries the response was YES. [2023-11-19 07:40:50,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28618 conditions, 9797 events. 7180/9797 cut-off events. For 11159/11309 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 45349 event pairs, 758 based on Foata normal form. 104/8457 useless extension candidates. Maximal degree in co-relation 28588. Up to 4251 conditions per place. [2023-11-19 07:40:50,298 INFO L140 encePairwiseOnDemand]: 497/509 looper letters, 137 selfloop transitions, 32 changer transitions 1/175 dead transitions. [2023-11-19 07:40:50,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 175 transitions, 1022 flow [2023-11-19 07:40:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:40:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:40:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2253 transitions. [2023-11-19 07:40:50,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402393284515092 [2023-11-19 07:40:50,311 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2253 transitions. [2023-11-19 07:40:50,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2253 transitions. [2023-11-19 07:40:50,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:50,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2253 transitions. [2023-11-19 07:40:50,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 204.8181818181818) internal successors, (2253), 11 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 509.0) internal successors, (6108), 12 states have internal predecessors, (6108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,341 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 509.0) internal successors, (6108), 12 states have internal predecessors, (6108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,342 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 247 flow. Second operand 11 states and 2253 transitions. [2023-11-19 07:40:50,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 175 transitions, 1022 flow [2023-11-19 07:40:50,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 175 transitions, 1013 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:50,423 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 516 flow [2023-11-19 07:40:50,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=516, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-11-19 07:40:50,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2023-11-19 07:40:50,428 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 516 flow [2023-11-19 07:40:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 195.3125) internal successors, (3125), 16 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:50,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:50,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:50,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:50,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:50,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash 494917301, now seen corresponding path program 2 times [2023-11-19 07:40:50,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:50,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070570392] [2023-11-19 07:40:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:50,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:51,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070570392] [2023-11-19 07:40:51,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070570392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:51,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955400029] [2023-11-19 07:40:51,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:51,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:51,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:51,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:51,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:51,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:51,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:40:51,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:52,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 07:40:52,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-11-19 07:40:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:52,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:52,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:52,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-19 07:40:52,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:40:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:52,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955400029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:52,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:52,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-19 07:40:52,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235200985] [2023-11-19 07:40:52,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:40:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:40:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=285, Unknown=1, NotChecked=0, Total=342 [2023-11-19 07:40:53,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 509 [2023-11-19 07:40:53,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 516 flow. Second operand has 19 states, 19 states have (on average 174.26315789473685) internal successors, (3311), 19 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:53,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:53,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 509 [2023-11-19 07:40:53,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:56,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:41:01,135 INFO L124 PetriNetUnfolderBase]: 21153/28117 cut-off events. [2023-11-19 07:41:01,136 INFO L125 PetriNetUnfolderBase]: For 37655/37655 co-relation queries the response was YES. [2023-11-19 07:41:01,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91090 conditions, 28117 events. 21153/28117 cut-off events. For 37655/37655 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 143476 event pairs, 1763 based on Foata normal form. 4/26050 useless extension candidates. Maximal degree in co-relation 64344. Up to 9080 conditions per place. [2023-11-19 07:41:01,394 INFO L140 encePairwiseOnDemand]: 499/509 looper letters, 232 selfloop transitions, 91 changer transitions 3/327 dead transitions. [2023-11-19 07:41:01,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 327 transitions, 2315 flow [2023-11-19 07:41:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:41:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:41:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3137 transitions. [2023-11-19 07:41:01,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625332254709349 [2023-11-19 07:41:01,408 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3137 transitions. [2023-11-19 07:41:01,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3137 transitions. [2023-11-19 07:41:01,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:01,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3137 transitions. [2023-11-19 07:41:01,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.52941176470588) internal successors, (3137), 17 states have internal predecessors, (3137), 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 07:41:01,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 509.0) internal successors, (9162), 18 states have internal predecessors, (9162), 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 07:41:01,443 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 509.0) internal successors, (9162), 18 states have internal predecessors, (9162), 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 07:41:01,444 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 516 flow. Second operand 17 states and 3137 transitions. [2023-11-19 07:41:01,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 327 transitions, 2315 flow [2023-11-19 07:41:01,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 327 transitions, 2267 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:01,807 INFO L231 Difference]: Finished difference. Result has 92 places, 147 transitions, 1304 flow [2023-11-19 07:41:01,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1304, PETRI_PLACES=92, PETRI_TRANSITIONS=147} [2023-11-19 07:41:01,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2023-11-19 07:41:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 147 transitions, 1304 flow [2023-11-19 07:41:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 174.26315789473685) internal successors, (3311), 19 states have internal predecessors, (3311), 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 07:41:01,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:01,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:01,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:41:02,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:41:02,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1132370923, now seen corresponding path program 3 times [2023-11-19 07:41:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:02,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980565860] [2023-11-19 07:41:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:02,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980565860] [2023-11-19 07:41:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980565860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433351614] [2023-11-19 07:41:03,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:03,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:03,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:03,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:04,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c794ef9-c949-4352-aa10-d96658cba277/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:04,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:41:04,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:04,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:41:04,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:04,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:41:04,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:41:04,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:41:04,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:04,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:41:05,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:05,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:41:05,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:41:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:05,251 INFO L327 TraceCheckSpWp]: Computing backward predicates...