./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ --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 a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:42:28,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:42:28,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:42:28,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:42:28,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:42:28,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:42:28,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:42:28,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:42:28,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:42:28,300 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:42:28,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:42:28,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:42:28,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:42:28,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:42:28,304 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:42:28,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:42:28,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:42:28,306 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:42:28,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:42:28,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:42:28,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:42:28,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:42:28,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:42:28,309 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:42:28,310 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:42:28,310 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:42:28,311 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:42:28,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:42:28,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:42:28,313 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:42:28,314 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:42:28,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:42:28,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:42:28,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:42:28,316 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:42:28,316 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:42:28,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:42:28,317 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:42:28,317 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:42:28,317 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:42:28,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:42:28,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:42:28,318 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_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2023-11-23 22:42:28,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:42:28,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:42:28,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:42:28,672 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:42:28,673 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:42:28,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-23 22:42:31,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:42:31,970 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:42:31,971 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-23 22:42:31,980 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/data/9e8b9489b/571918e7a0404ed988c2d4eca1b5c55c/FLAG33d901c53 [2023-11-23 22:42:31,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/data/9e8b9489b/571918e7a0404ed988c2d4eca1b5c55c [2023-11-23 22:42:31,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:42:31,998 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:42:32,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:42:32,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:42:32,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:42:32,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:42:31" (1/1) ... [2023-11-23 22:42:32,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc73ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32, skipping insertion in model container [2023-11-23 22:42:32,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:42:31" (1/1) ... [2023-11-23 22:42:32,031 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:42:32,227 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_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-23 22:42:32,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:42:32,241 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:42:32,274 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_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-23 22:42:32,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:42:32,284 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:42:32,289 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:42:32,297 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:42:32,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32 WrapperNode [2023-11-23 22:42:32,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:42:32,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:42:32,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:42:32,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:42:32,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,341 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-23 22:42:32,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:42:32,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:42:32,342 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:42:32,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:42:32,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,356 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,372 INFO L189 HeapSplitter]: Split 6 memory accesses to 3 slices as follows [2, 2, 2] [2023-11-23 22:42:32,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,386 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:42:32,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:42:32,391 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:42:32,391 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:42:32,392 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (1/1) ... [2023-11-23 22:42:32,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:42:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:32,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:42:32,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:42:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:42:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:42:32,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:42:32,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:42:32,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:42:32,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:42:32,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:42:32,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:42:32,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:42:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:42:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:42:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:42:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:42:32,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:42:32,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:42:32,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:42:32,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:42:32,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:42:32,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:42:32,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:42:32,494 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:42:32,698 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:42:32,700 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:42:32,925 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:42:33,114 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:42:33,115 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:42:33,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:42:33 BoogieIcfgContainer [2023-11-23 22:42:33,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:42:33,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:42:33,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:42:33,125 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:42:33,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:42:31" (1/3) ... [2023-11-23 22:42:33,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f0dfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:42:33, skipping insertion in model container [2023-11-23 22:42:33,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:42:32" (2/3) ... [2023-11-23 22:42:33,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f0dfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:42:33, skipping insertion in model container [2023-11-23 22:42:33,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:42:33" (3/3) ... [2023-11-23 22:42:33,131 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-23 22:42:33,140 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:42:33,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:42:33,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:42:33,152 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:42:33,206 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:42:33,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-23 22:42:33,270 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-23 22:42:33,270 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:42:33,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-23 22:42:33,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-23 22:42:33,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-23 22:42:33,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:42:33,294 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;@28fe8099, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:42:33,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 22:42:33,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:42:33,306 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-23 22:42:33,306 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:42:33,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:33,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:33,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:33,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 954584566, now seen corresponding path program 1 times [2023-11-23 22:42:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:33,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416575611] [2023-11-23 22:42:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:33,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:33,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:33,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416575611] [2023-11-23 22:42:33,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416575611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:33,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:33,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:42:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306347279] [2023-11-23 22:42:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:33,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:42:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:33,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:42:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:42:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-23 22:42:33,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-23 22:42:33,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:33,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-23 22:42:33,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:34,018 INFO L124 PetriNetUnfolderBase]: 82/167 cut-off events. [2023-11-23 22:42:34,018 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-23 22:42:34,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 167 events. 82/167 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 523 event pairs, 30 based on Foata normal form. 6/172 useless extension candidates. Maximal degree in co-relation 270. Up to 99 conditions per place. [2023-11-23 22:42:34,024 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-23 22:42:34,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 135 flow [2023-11-23 22:42:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:42:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:42:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2023-11-23 22:42:34,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-23 22:42:34,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2023-11-23 22:42:34,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2023-11-23 22:42:34,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:34,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2023-11-23 22:42:34,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-23 22:42:34,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-23 22:42:34,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-23 22:42:34,051 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 44 transitions. [2023-11-23 22:42:34,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 135 flow [2023-11-23 22:42:34,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:42:34,056 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 58 flow [2023-11-23 22:42:34,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2023-11-23 22:42:34,062 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-11-23 22:42:34,062 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 58 flow [2023-11-23 22:42:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-23 22:42:34,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:34,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:42:34,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:34,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash -653057610, now seen corresponding path program 1 times [2023-11-23 22:42:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:34,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677575316] [2023-11-23 22:42:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:34,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677575316] [2023-11-23 22:42:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677575316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:34,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:34,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634096594] [2023-11-23 22:42:34,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:34,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:42:34,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:42:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:42:34,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:34,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-11-23 22:42:34,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:34,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:34,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:34,604 INFO L124 PetriNetUnfolderBase]: 146/283 cut-off events. [2023-11-23 22:42:34,605 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-23 22:42:34,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 283 events. 146/283 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1117 event pairs, 66 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 241. Up to 189 conditions per place. [2023-11-23 22:42:34,611 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 30 selfloop transitions, 7 changer transitions 3/43 dead transitions. [2023-11-23 22:42:34,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 187 flow [2023-11-23 22:42:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:42:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:42:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-23 22:42:34,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2023-11-23 22:42:34,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-23 22:42:34,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-23 22:42:34,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:34,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-23 22:42:34,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2023-11-23 22:42:34,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-23 22:42:34,624 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-23 22:42:34,624 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 58 flow. Second operand 5 states and 61 transitions. [2023-11-23 22:42:34,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 187 flow [2023-11-23 22:42:34,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:42:34,632 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 108 flow [2023-11-23 22:42:34,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-23 22:42:34,634 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-11-23 22:42:34,638 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 108 flow [2023-11-23 22:42:34,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-11-23 22:42:34,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:34,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:42:34,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:34,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1678281516, now seen corresponding path program 2 times [2023-11-23 22:42:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949394154] [2023-11-23 22:42:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:34,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:34,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949394154] [2023-11-23 22:42:34,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949394154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:34,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:34,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:42:34,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997237026] [2023-11-23 22:42:34,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:34,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:42:34,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:42:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:42:34,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:34,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2023-11-23 22:42:34,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:34,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:34,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:35,106 INFO L124 PetriNetUnfolderBase]: 166/316 cut-off events. [2023-11-23 22:42:35,107 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-11-23 22:42:35,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 316 events. 166/316 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1287 event pairs, 4 based on Foata normal form. 10/324 useless extension candidates. Maximal degree in co-relation 387. Up to 134 conditions per place. [2023-11-23 22:42:35,116 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 47 selfloop transitions, 13 changer transitions 1/64 dead transitions. [2023-11-23 22:42:35,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 64 transitions, 358 flow [2023-11-23 22:42:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:42:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:42:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-23 22:42:35,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2023-11-23 22:42:35,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-23 22:42:35,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-23 22:42:35,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:35,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-23 22:42:35,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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) [2023-11-23 22:42:35,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:42:35,127 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:42:35,127 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 108 flow. Second operand 7 states and 86 transitions. [2023-11-23 22:42:35,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 64 transitions, 358 flow [2023-11-23 22:42:35,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 356 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-23 22:42:35,134 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 214 flow [2023-11-23 22:42:35,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-23 22:42:35,136 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-23 22:42:35,136 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 214 flow [2023-11-23 22:42:35,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2023-11-23 22:42:35,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:35,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:35,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:42:35,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:35,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1893552388, now seen corresponding path program 3 times [2023-11-23 22:42:35,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:35,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860877210] [2023-11-23 22:42:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860877210] [2023-11-23 22:42:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860877210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:35,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277544151] [2023-11-23 22:42:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:35,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:42:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:42:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:42:35,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:35,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-11-23 22:42:35,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:35,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:35,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:35,479 INFO L124 PetriNetUnfolderBase]: 219/416 cut-off events. [2023-11-23 22:42:35,480 INFO L125 PetriNetUnfolderBase]: For 742/742 co-relation queries the response was YES. [2023-11-23 22:42:35,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 416 events. 219/416 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1682 event pairs, 69 based on Foata normal form. 6/417 useless extension candidates. Maximal degree in co-relation 995. Up to 179 conditions per place. [2023-11-23 22:42:35,485 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 44 selfloop transitions, 10 changer transitions 2/59 dead transitions. [2023-11-23 22:42:35,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 443 flow [2023-11-23 22:42:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:42:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:42:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-23 22:42:35,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-11-23 22:42:35,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-23 22:42:35,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-23 22:42:35,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:35,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-23 22:42:35,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-11-23 22:42:35,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-23 22:42:35,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-23 22:42:35,490 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 214 flow. Second operand 5 states and 60 transitions. [2023-11-23 22:42:35,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 443 flow [2023-11-23 22:42:35,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:42:35,502 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 270 flow [2023-11-23 22:42:35,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-23 22:42:35,504 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2023-11-23 22:42:35,504 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 270 flow [2023-11-23 22:42:35,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-11-23 22:42:35,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:35,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:42:35,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:35,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash -588269998, now seen corresponding path program 4 times [2023-11-23 22:42:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2508914] [2023-11-23 22:42:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:35,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:35,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2508914] [2023-11-23 22:42:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2508914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062229968] [2023-11-23 22:42:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:42:35,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:35,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:35,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:42:35,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:42:35,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:35,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:42:35,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:35,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:35,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062229968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:35,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2023-11-23 22:42:35,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553586000] [2023-11-23 22:42:35,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:35,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:42:35,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:42:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:42:35,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-23 22:42:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:35,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:36,261 INFO L124 PetriNetUnfolderBase]: 323/608 cut-off events. [2023-11-23 22:42:36,261 INFO L125 PetriNetUnfolderBase]: For 1503/1503 co-relation queries the response was YES. [2023-11-23 22:42:36,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2345 conditions, 608 events. 323/608 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2843 event pairs, 33 based on Foata normal form. 10/610 useless extension candidates. Maximal degree in co-relation 1653. Up to 169 conditions per place. [2023-11-23 22:42:36,275 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 53 selfloop transitions, 35 changer transitions 2/93 dead transitions. [2023-11-23 22:42:36,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 759 flow [2023-11-23 22:42:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:42:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:42:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2023-11-23 22:42:36,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2023-11-23 22:42:36,277 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 119 transitions. [2023-11-23 22:42:36,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 119 transitions. [2023-11-23 22:42:36,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:36,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 119 transitions. [2023-11-23 22:42:36,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 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) [2023-11-23 22:42:36,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 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) [2023-11-23 22:42:36,280 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 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) [2023-11-23 22:42:36,280 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 270 flow. Second operand 10 states and 119 transitions. [2023-11-23 22:42:36,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 759 flow [2023-11-23 22:42:36,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 735 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-23 22:42:36,289 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 522 flow [2023-11-23 22:42:36,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=522, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-23 22:42:36,290 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2023-11-23 22:42:36,290 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 522 flow [2023-11-23 22:42:36,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-23 22:42:36,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:36,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:36,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:36,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:36,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:36,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash -863995678, now seen corresponding path program 5 times [2023-11-23 22:42:36,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:36,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782633681] [2023-11-23 22:42:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:36,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:36,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782633681] [2023-11-23 22:42:36,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782633681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:36,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:36,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649252219] [2023-11-23 22:42:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:42:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:42:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:42:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 522 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-11-23 22:42:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:36,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:36,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:36,862 INFO L124 PetriNetUnfolderBase]: 322/605 cut-off events. [2023-11-23 22:42:36,862 INFO L125 PetriNetUnfolderBase]: For 3129/3129 co-relation queries the response was YES. [2023-11-23 22:42:36,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 605 events. 322/605 cut-off events. For 3129/3129 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2761 event pairs, 97 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 2137. Up to 319 conditions per place. [2023-11-23 22:42:36,874 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 49 selfloop transitions, 20 changer transitions 1/73 dead transitions. [2023-11-23 22:42:36,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 799 flow [2023-11-23 22:42:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:42:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:42:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-23 22:42:36,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-11-23 22:42:36,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-23 22:42:36,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-23 22:42:36,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:36,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-23 22:42:36,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-11-23 22:42:36,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-23 22:42:36,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-23 22:42:36,880 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 522 flow. Second operand 5 states and 60 transitions. [2023-11-23 22:42:36,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 799 flow [2023-11-23 22:42:36,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 719 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-11-23 22:42:36,900 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 555 flow [2023-11-23 22:42:36,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-23 22:42:36,904 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2023-11-23 22:42:36,904 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 555 flow [2023-11-23 22:42:36,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2023-11-23 22:42:36,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:36,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:36,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:42:36,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:36,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2113758336, now seen corresponding path program 6 times [2023-11-23 22:42:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:36,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119292729] [2023-11-23 22:42:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:36,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119292729] [2023-11-23 22:42:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119292729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:37,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:42:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235854352] [2023-11-23 22:42:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:42:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:42:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:42:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:37,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 555 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2023-11-23 22:42:37,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:37,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:37,272 INFO L124 PetriNetUnfolderBase]: 323/597 cut-off events. [2023-11-23 22:42:37,272 INFO L125 PetriNetUnfolderBase]: For 3181/3181 co-relation queries the response was YES. [2023-11-23 22:42:37,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 597 events. 323/597 cut-off events. For 3181/3181 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2643 event pairs, 101 based on Foata normal form. 8/600 useless extension candidates. Maximal degree in co-relation 2173. Up to 300 conditions per place. [2023-11-23 22:42:37,282 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 48 selfloop transitions, 26 changer transitions 0/77 dead transitions. [2023-11-23 22:42:37,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 796 flow [2023-11-23 22:42:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:42:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:42:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2023-11-23 22:42:37,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2023-11-23 22:42:37,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 70 transitions. [2023-11-23 22:42:37,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 70 transitions. [2023-11-23 22:42:37,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:37,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 70 transitions. [2023-11-23 22:42:37,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2023-11-23 22:42:37,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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) [2023-11-23 22:42:37,287 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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) [2023-11-23 22:42:37,288 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 555 flow. Second operand 6 states and 70 transitions. [2023-11-23 22:42:37,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 796 flow [2023-11-23 22:42:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 750 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-23 22:42:37,304 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 585 flow [2023-11-23 22:42:37,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-11-23 22:42:37,305 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2023-11-23 22:42:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 585 flow [2023-11-23 22:42:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2023-11-23 22:42:37,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:37,306 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] [2023-11-23 22:42:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:42:37,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:37,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2100107881, now seen corresponding path program 1 times [2023-11-23 22:42:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:37,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660846035] [2023-11-23 22:42:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660846035] [2023-11-23 22:42:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660846035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299468304] [2023-11-23 22:42:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:37,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:37,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:42:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:37,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:42:37,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:42:37,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:42:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299468304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:37,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:37,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-23 22:42:37,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381378473] [2023-11-23 22:42:37,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:37,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:37,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:37,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:37,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:37,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-23 22:42:37,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 585 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-23 22:42:37,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:37,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-23 22:42:37,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:37,940 INFO L124 PetriNetUnfolderBase]: 494/986 cut-off events. [2023-11-23 22:42:37,940 INFO L125 PetriNetUnfolderBase]: For 4996/5038 co-relation queries the response was YES. [2023-11-23 22:42:37,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 986 events. 494/986 cut-off events. For 4996/5038 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5252 event pairs, 86 based on Foata normal form. 15/995 useless extension candidates. Maximal degree in co-relation 2546. Up to 395 conditions per place. [2023-11-23 22:42:37,956 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 74 selfloop transitions, 5 changer transitions 7/103 dead transitions. [2023-11-23 22:42:37,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 1104 flow [2023-11-23 22:42:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:42:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:42:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-23 22:42:37,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2023-11-23 22:42:37,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-23 22:42:37,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-23 22:42:37,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:37,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-23 22:42:37,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-23 22:42:37,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2023-11-23 22:42:37,960 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2023-11-23 22:42:37,960 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 585 flow. Second operand 4 states and 65 transitions. [2023-11-23 22:42:37,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 1104 flow [2023-11-23 22:42:37,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 1043 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-23 22:42:37,979 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 581 flow [2023-11-23 22:42:37,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=581, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-23 22:42:37,981 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-23 22:42:37,982 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 581 flow [2023-11-23 22:42:37,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-23 22:42:37,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:37,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:38,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:38,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:38,208 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:38,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2099268387, now seen corresponding path program 2 times [2023-11-23 22:42:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:38,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354833507] [2023-11-23 22:42:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:38,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354833507] [2023-11-23 22:42:38,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354833507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405551171] [2023-11-23 22:42:38,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:42:38,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:38,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:38,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:38,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:42:38,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:42:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:38,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:42:38,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:38,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405551171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:38,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:38,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-23 22:42:38,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315240113] [2023-11-23 22:42:38,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:38,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:42:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:42:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:42:38,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:38,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 581 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2023-11-23 22:42:38,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:38,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:38,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:39,706 INFO L124 PetriNetUnfolderBase]: 1176/2028 cut-off events. [2023-11-23 22:42:39,706 INFO L125 PetriNetUnfolderBase]: For 9674/9698 co-relation queries the response was YES. [2023-11-23 22:42:39,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9830 conditions, 2028 events. 1176/2028 cut-off events. For 9674/9698 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10239 event pairs, 70 based on Foata normal form. 22/2048 useless extension candidates. Maximal degree in co-relation 5874. Up to 671 conditions per place. [2023-11-23 22:42:39,734 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 123 selfloop transitions, 87 changer transitions 7/222 dead transitions. [2023-11-23 22:42:39,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 222 transitions, 2353 flow [2023-11-23 22:42:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 22:42:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-23 22:42:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 233 transitions. [2023-11-23 22:42:39,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824016563146998 [2023-11-23 22:42:39,737 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 233 transitions. [2023-11-23 22:42:39,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 233 transitions. [2023-11-23 22:42:39,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:39,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 233 transitions. [2023-11-23 22:42:39,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.095238095238095) internal successors, (233), 21 states have internal predecessors, (233), 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) [2023-11-23 22:42:39,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 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) [2023-11-23 22:42:39,741 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 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) [2023-11-23 22:42:39,741 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 581 flow. Second operand 21 states and 233 transitions. [2023-11-23 22:42:39,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 222 transitions, 2353 flow [2023-11-23 22:42:39,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 222 transitions, 2321 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-11-23 22:42:39,765 INFO L231 Difference]: Finished difference. Result has 95 places, 127 transitions, 1477 flow [2023-11-23 22:42:39,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1477, PETRI_PLACES=95, PETRI_TRANSITIONS=127} [2023-11-23 22:42:39,767 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 70 predicate places. [2023-11-23 22:42:39,768 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 127 transitions, 1477 flow [2023-11-23 22:42:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2023-11-23 22:42:39,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:39,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:39,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:39,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:39,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 209099007, now seen corresponding path program 3 times [2023-11-23 22:42:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:39,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606225333] [2023-11-23 22:42:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606225333] [2023-11-23 22:42:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606225333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113477656] [2023-11-23 22:42:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:42:40,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:40,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:40,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:40,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:42:40,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 22:42:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:40,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:42:40,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:40,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:40,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113477656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:40,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:40,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-23 22:42:40,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774206961] [2023-11-23 22:42:40,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:40,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:42:40,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:40,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:42:40,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:42:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:40,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 1477 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2023-11-23 22:42:40,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:40,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:41,315 INFO L124 PetriNetUnfolderBase]: 1266/2190 cut-off events. [2023-11-23 22:42:41,315 INFO L125 PetriNetUnfolderBase]: For 23337/23365 co-relation queries the response was YES. [2023-11-23 22:42:41,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12909 conditions, 2190 events. 1266/2190 cut-off events. For 23337/23365 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11476 event pairs, 176 based on Foata normal form. 28/2210 useless extension candidates. Maximal degree in co-relation 8596. Up to 973 conditions per place. [2023-11-23 22:42:41,350 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 125 selfloop transitions, 75 changer transitions 11/216 dead transitions. [2023-11-23 22:42:41,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 216 transitions, 2849 flow [2023-11-23 22:42:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:42:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-23 22:42:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 157 transitions. [2023-11-23 22:42:41,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45507246376811594 [2023-11-23 22:42:41,353 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 157 transitions. [2023-11-23 22:42:41,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 157 transitions. [2023-11-23 22:42:41,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:41,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 157 transitions. [2023-11-23 22:42:41,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:42:41,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 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) [2023-11-23 22:42:41,356 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 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) [2023-11-23 22:42:41,356 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 1477 flow. Second operand 15 states and 157 transitions. [2023-11-23 22:42:41,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 216 transitions, 2849 flow [2023-11-23 22:42:41,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 216 transitions, 2507 flow, removed 154 selfloop flow, removed 3 redundant places. [2023-11-23 22:42:41,413 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1829 flow [2023-11-23 22:42:41,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1829, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2023-11-23 22:42:41,414 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2023-11-23 22:42:41,414 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1829 flow [2023-11-23 22:42:41,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2023-11-23 22:42:41,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:41,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:41,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:41,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:41,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:41,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1110413583, now seen corresponding path program 4 times [2023-11-23 22:42:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:41,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519276047] [2023-11-23 22:42:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:41,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:41,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519276047] [2023-11-23 22:42:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519276047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128097681] [2023-11-23 22:42:41,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:42:41,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:41,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:41,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:42:41,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:42:41,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:41,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:42:41,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:42,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:42,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128097681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:42,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:42,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-23 22:42:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132026242] [2023-11-23 22:42:42,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:42:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:42:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:42:42,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:42,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1829 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 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) [2023-11-23 22:42:42,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:42,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:42,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:43,356 INFO L124 PetriNetUnfolderBase]: 1701/2899 cut-off events. [2023-11-23 22:42:43,356 INFO L125 PetriNetUnfolderBase]: For 29748/29766 co-relation queries the response was YES. [2023-11-23 22:42:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 2899 events. 1701/2899 cut-off events. For 29748/29766 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15786 event pairs, 41 based on Foata normal form. 64/2941 useless extension candidates. Maximal degree in co-relation 16500. Up to 907 conditions per place. [2023-11-23 22:42:43,400 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 131 selfloop transitions, 234 changer transitions 3/373 dead transitions. [2023-11-23 22:42:43,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 373 transitions, 4861 flow [2023-11-23 22:42:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 22:42:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 22:42:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 232 transitions. [2023-11-23 22:42:43,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43856332703213613 [2023-11-23 22:42:43,403 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 232 transitions. [2023-11-23 22:42:43,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 232 transitions. [2023-11-23 22:42:43,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:43,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 232 transitions. [2023-11-23 22:42:43,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:42:43,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 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) [2023-11-23 22:42:43,407 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 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) [2023-11-23 22:42:43,407 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1829 flow. Second operand 23 states and 232 transitions. [2023-11-23 22:42:43,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 373 transitions, 4861 flow [2023-11-23 22:42:43,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 373 transitions, 4722 flow, removed 52 selfloop flow, removed 3 redundant places. [2023-11-23 22:42:43,511 INFO L231 Difference]: Finished difference. Result has 144 places, 287 transitions, 4255 flow [2023-11-23 22:42:43,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4255, PETRI_PLACES=144, PETRI_TRANSITIONS=287} [2023-11-23 22:42:43,512 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2023-11-23 22:42:43,512 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 287 transitions, 4255 flow [2023-11-23 22:42:43,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 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) [2023-11-23 22:42:43,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:43,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:43,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:43,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 22:42:43,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:43,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash 624163753, now seen corresponding path program 5 times [2023-11-23 22:42:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:43,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519764093] [2023-11-23 22:42:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:43,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:43,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519764093] [2023-11-23 22:42:43,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519764093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147243239] [2023-11-23 22:42:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:42:43,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:43,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:43,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:43,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:42:44,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:42:44,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:44,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:42:44,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:44,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:44,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147243239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:44,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:44,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-23 22:42:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378620404] [2023-11-23 22:42:44,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:42:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:42:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:42:44,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:44,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 287 transitions, 4255 flow. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2023-11-23 22:42:44,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:44,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:44,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:46,729 INFO L124 PetriNetUnfolderBase]: 2398/4153 cut-off events. [2023-11-23 22:42:46,730 INFO L125 PetriNetUnfolderBase]: For 50882/50912 co-relation queries the response was YES. [2023-11-23 22:42:46,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 4153 events. 2398/4153 cut-off events. For 50882/50912 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24798 event pairs, 104 based on Foata normal form. 144/4265 useless extension candidates. Maximal degree in co-relation 26826. Up to 1247 conditions per place. [2023-11-23 22:42:46,877 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 164 selfloop transitions, 412 changer transitions 7/588 dead transitions. [2023-11-23 22:42:46,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 588 transitions, 9092 flow [2023-11-23 22:42:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-23 22:42:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-23 22:42:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 350 transitions. [2023-11-23 22:42:46,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112808460634548 [2023-11-23 22:42:46,885 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 350 transitions. [2023-11-23 22:42:46,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 350 transitions. [2023-11-23 22:42:46,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:46,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 350 transitions. [2023-11-23 22:42:46,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.45945945945946) internal successors, (350), 37 states have internal predecessors, (350), 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) [2023-11-23 22:42:46,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 23.0) internal successors, (874), 38 states have internal predecessors, (874), 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) [2023-11-23 22:42:46,907 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 23.0) internal successors, (874), 38 states have internal predecessors, (874), 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) [2023-11-23 22:42:46,907 INFO L175 Difference]: Start difference. First operand has 144 places, 287 transitions, 4255 flow. Second operand 37 states and 350 transitions. [2023-11-23 22:42:46,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 588 transitions, 9092 flow [2023-11-23 22:42:47,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 588 transitions, 7839 flow, removed 547 selfloop flow, removed 3 redundant places. [2023-11-23 22:42:47,243 INFO L231 Difference]: Finished difference. Result has 194 places, 458 transitions, 7345 flow [2023-11-23 22:42:47,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3737, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7345, PETRI_PLACES=194, PETRI_TRANSITIONS=458} [2023-11-23 22:42:47,244 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2023-11-23 22:42:47,245 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 458 transitions, 7345 flow [2023-11-23 22:42:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2023-11-23 22:42:47,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:47,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:47,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:47,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:42:47,464 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:47,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1145130497, now seen corresponding path program 6 times [2023-11-23 22:42:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:47,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266349808] [2023-11-23 22:42:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266349808] [2023-11-23 22:42:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266349808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201709719] [2023-11-23 22:42:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:42:47,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:47,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:47,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:47,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:42:47,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-23 22:42:47,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:47,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:42:47,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:47,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201709719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:48,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-23 22:42:48,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340043310] [2023-11-23 22:42:48,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:42:48,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:42:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:42:48,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:48,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 458 transitions, 7345 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2023-11-23 22:42:48,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:48,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:48,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:50,898 INFO L124 PetriNetUnfolderBase]: 3014/5273 cut-off events. [2023-11-23 22:42:50,898 INFO L125 PetriNetUnfolderBase]: For 67136/67170 co-relation queries the response was YES. [2023-11-23 22:42:50,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35381 conditions, 5273 events. 3014/5273 cut-off events. For 67136/67170 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33204 event pairs, 138 based on Foata normal form. 70/5301 useless extension candidates. Maximal degree in co-relation 34105. Up to 1005 conditions per place. [2023-11-23 22:42:51,017 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 190 selfloop transitions, 509 changer transitions 5/709 dead transitions. [2023-11-23 22:42:51,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 709 transitions, 11947 flow [2023-11-23 22:42:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 22:42:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-23 22:42:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 333 transitions. [2023-11-23 22:42:51,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43873517786561267 [2023-11-23 22:42:51,021 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 333 transitions. [2023-11-23 22:42:51,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 333 transitions. [2023-11-23 22:42:51,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:51,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 333 transitions. [2023-11-23 22:42:51,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 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) [2023-11-23 22:42:51,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 23.0) internal successors, (782), 34 states have internal predecessors, (782), 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) [2023-11-23 22:42:51,026 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 23.0) internal successors, (782), 34 states have internal predecessors, (782), 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) [2023-11-23 22:42:51,026 INFO L175 Difference]: Start difference. First operand has 194 places, 458 transitions, 7345 flow. Second operand 33 states and 333 transitions. [2023-11-23 22:42:51,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 709 transitions, 11947 flow [2023-11-23 22:42:51,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 709 transitions, 10926 flow, removed 309 selfloop flow, removed 8 redundant places. [2023-11-23 22:42:51,840 INFO L231 Difference]: Finished difference. Result has 226 places, 596 transitions, 10157 flow [2023-11-23 22:42:51,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6551, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10157, PETRI_PLACES=226, PETRI_TRANSITIONS=596} [2023-11-23 22:42:51,841 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 201 predicate places. [2023-11-23 22:42:51,841 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 596 transitions, 10157 flow [2023-11-23 22:42:51,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2023-11-23 22:42:51,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:51,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:51,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 22:42:52,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:42:52,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:52,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1396034703, now seen corresponding path program 7 times [2023-11-23 22:42:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:52,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688186483] [2023-11-23 22:42:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:52,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:52,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688186483] [2023-11-23 22:42:52,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688186483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:52,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753371946] [2023-11-23 22:42:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:42:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:52,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:52,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:42:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:52,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:42:52,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:52,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:52,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753371946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:52,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:52,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-23 22:42:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53124712] [2023-11-23 22:42:52,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:52,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:42:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:42:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:42:52,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:52,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 596 transitions, 10157 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2023-11-23 22:42:52,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:52,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:52,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:42:55,796 INFO L124 PetriNetUnfolderBase]: 3378/5861 cut-off events. [2023-11-23 22:42:55,796 INFO L125 PetriNetUnfolderBase]: For 82126/82162 co-relation queries the response was YES. [2023-11-23 22:42:55,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 5861 events. 3378/5861 cut-off events. For 82126/82162 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 36560 event pairs, 281 based on Foata normal form. 40/5869 useless extension candidates. Maximal degree in co-relation 40680. Up to 1339 conditions per place. [2023-11-23 22:42:55,862 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 239 selfloop transitions, 507 changer transitions 3/754 dead transitions. [2023-11-23 22:42:55,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 754 transitions, 13804 flow [2023-11-23 22:42:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 22:42:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 22:42:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 252 transitions. [2023-11-23 22:42:55,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763705103969754 [2023-11-23 22:42:55,865 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 252 transitions. [2023-11-23 22:42:55,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 252 transitions. [2023-11-23 22:42:55,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:42:55,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 252 transitions. [2023-11-23 22:42:55,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.956521739130435) internal successors, (252), 23 states have internal predecessors, (252), 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) [2023-11-23 22:42:55,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 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) [2023-11-23 22:42:55,868 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 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) [2023-11-23 22:42:55,869 INFO L175 Difference]: Start difference. First operand has 226 places, 596 transitions, 10157 flow. Second operand 23 states and 252 transitions. [2023-11-23 22:42:55,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 754 transitions, 13804 flow [2023-11-23 22:42:56,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 754 transitions, 13526 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-11-23 22:42:56,841 INFO L231 Difference]: Finished difference. Result has 246 places, 661 transitions, 12462 flow [2023-11-23 22:42:56,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9782, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12462, PETRI_PLACES=246, PETRI_TRANSITIONS=661} [2023-11-23 22:42:56,842 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 221 predicate places. [2023-11-23 22:42:56,842 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 661 transitions, 12462 flow [2023-11-23 22:42:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2023-11-23 22:42:56,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:42:56,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:56,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 22:42:57,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:57,044 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:42:57,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -958695929, now seen corresponding path program 8 times [2023-11-23 22:42:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:57,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129245126] [2023-11-23 22:42:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:57,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:57,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:57,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129245126] [2023-11-23 22:42:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129245126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486795397] [2023-11-23 22:42:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:42:57,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:57,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:57,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:42:57,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:42:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:42:57,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:42:57,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:57,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:42:57,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486795397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:42:57,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:42:57,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-23 22:42:57,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351110622] [2023-11-23 22:42:57,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:57,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:42:57,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:57,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:42:57,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:42:57,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:42:57,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 661 transitions, 12462 flow. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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) [2023-11-23 22:42:57,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:42:57,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:42:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:00,838 INFO L124 PetriNetUnfolderBase]: 4287/7422 cut-off events. [2023-11-23 22:43:00,838 INFO L125 PetriNetUnfolderBase]: For 123962/124000 co-relation queries the response was YES. [2023-11-23 22:43:00,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55669 conditions, 7422 events. 4287/7422 cut-off events. For 123962/124000 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48384 event pairs, 312 based on Foata normal form. 86/7448 useless extension candidates. Maximal degree in co-relation 54645. Up to 1363 conditions per place. [2023-11-23 22:43:00,928 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 248 selfloop transitions, 691 changer transitions 9/953 dead transitions. [2023-11-23 22:43:00,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 953 transitions, 19125 flow [2023-11-23 22:43:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 22:43:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-23 22:43:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 284 transitions. [2023-11-23 22:43:00,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409937888198758 [2023-11-23 22:43:00,930 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 284 transitions. [2023-11-23 22:43:00,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 284 transitions. [2023-11-23 22:43:00,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:00,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 284 transitions. [2023-11-23 22:43:00,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 10.142857142857142) internal successors, (284), 28 states have internal predecessors, (284), 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) [2023-11-23 22:43:00,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 23.0) internal successors, (667), 29 states have internal predecessors, (667), 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) [2023-11-23 22:43:00,933 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 23.0) internal successors, (667), 29 states have internal predecessors, (667), 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) [2023-11-23 22:43:00,934 INFO L175 Difference]: Start difference. First operand has 246 places, 661 transitions, 12462 flow. Second operand 28 states and 284 transitions. [2023-11-23 22:43:00,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 953 transitions, 19125 flow [2023-11-23 22:43:02,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 953 transitions, 18606 flow, removed 127 selfloop flow, removed 5 redundant places. [2023-11-23 22:43:02,277 INFO L231 Difference]: Finished difference. Result has 276 places, 866 transitions, 18662 flow [2023-11-23 22:43:02,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12057, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18662, PETRI_PLACES=276, PETRI_TRANSITIONS=866} [2023-11-23 22:43:02,279 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 251 predicate places. [2023-11-23 22:43:02,279 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 866 transitions, 18662 flow [2023-11-23 22:43:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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) [2023-11-23 22:43:02,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:02,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:02,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:02,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:02,480 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:43:02,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1274035931, now seen corresponding path program 9 times [2023-11-23 22:43:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:02,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781839503] [2023-11-23 22:43:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:02,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:02,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:02,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781839503] [2023-11-23 22:43:02,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781839503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:02,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935727373] [2023-11-23 22:43:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:43:02,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:02,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:02,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:43:02,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 22:43:02,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:02,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:43:02,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:02,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:03,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935727373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:03,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:43:03,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-23 22:43:03,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609801578] [2023-11-23 22:43:03,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:03,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:43:03,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:03,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:43:03,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:43:03,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:43:03,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 866 transitions, 18662 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2023-11-23 22:43:03,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:03,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:43:03,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:06,592 INFO L124 PetriNetUnfolderBase]: 4250/7369 cut-off events. [2023-11-23 22:43:06,592 INFO L125 PetriNetUnfolderBase]: For 149972/150010 co-relation queries the response was YES. [2023-11-23 22:43:06,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60470 conditions, 7369 events. 4250/7369 cut-off events. For 149972/150010 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 48309 event pairs, 686 based on Foata normal form. 42/7339 useless extension candidates. Maximal degree in co-relation 59489. Up to 3178 conditions per place. [2023-11-23 22:43:06,702 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 400 selfloop transitions, 501 changer transitions 3/909 dead transitions. [2023-11-23 22:43:06,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 909 transitions, 20783 flow [2023-11-23 22:43:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:43:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 22:43:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 149 transitions. [2023-11-23 22:43:06,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46273291925465837 [2023-11-23 22:43:06,705 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 149 transitions. [2023-11-23 22:43:06,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 149 transitions. [2023-11-23 22:43:06,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:06,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 149 transitions. [2023-11-23 22:43:06,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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) [2023-11-23 22:43:06,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 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) [2023-11-23 22:43:06,707 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 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) [2023-11-23 22:43:06,707 INFO L175 Difference]: Start difference. First operand has 276 places, 866 transitions, 18662 flow. Second operand 14 states and 149 transitions. [2023-11-23 22:43:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 909 transitions, 20783 flow [2023-11-23 22:43:08,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 909 transitions, 19974 flow, removed 202 selfloop flow, removed 9 redundant places. [2023-11-23 22:43:08,884 INFO L231 Difference]: Finished difference. Result has 281 places, 866 transitions, 18878 flow [2023-11-23 22:43:08,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=17816, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18878, PETRI_PLACES=281, PETRI_TRANSITIONS=866} [2023-11-23 22:43:08,886 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 256 predicate places. [2023-11-23 22:43:08,886 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 866 transitions, 18878 flow [2023-11-23 22:43:08,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2023-11-23 22:43:08,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:08,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:08,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:09,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:43:09,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:43:09,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1192446287, now seen corresponding path program 10 times [2023-11-23 22:43:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164306451] [2023-11-23 22:43:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:09,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164306451] [2023-11-23 22:43:09,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164306451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149159907] [2023-11-23 22:43:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:43:09,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:09,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:09,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:09,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:43:09,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:43:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:09,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:43:09,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:09,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:09,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149159907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:09,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:43:09,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-23 22:43:09,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091580547] [2023-11-23 22:43:09,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:09,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:43:09,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:43:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:43:09,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:43:09,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 866 transitions, 18878 flow. Second operand has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 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) [2023-11-23 22:43:09,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:09,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:43:09,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:14,877 INFO L124 PetriNetUnfolderBase]: 5178/9095 cut-off events. [2023-11-23 22:43:14,877 INFO L125 PetriNetUnfolderBase]: For 185077/185119 co-relation queries the response was YES. [2023-11-23 22:43:14,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74033 conditions, 9095 events. 5178/9095 cut-off events. For 185077/185119 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 62669 event pairs, 401 based on Foata normal form. 134/9133 useless extension candidates. Maximal degree in co-relation 72934. Up to 1987 conditions per place. [2023-11-23 22:43:15,014 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 404 selfloop transitions, 843 changer transitions 1/1253 dead transitions. [2023-11-23 22:43:15,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1253 transitions, 28090 flow [2023-11-23 22:43:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-23 22:43:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-23 22:43:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 431 transitions. [2023-11-23 22:43:15,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435793731041456 [2023-11-23 22:43:15,027 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 431 transitions. [2023-11-23 22:43:15,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 431 transitions. [2023-11-23 22:43:15,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:15,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 431 transitions. [2023-11-23 22:43:15,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 10.023255813953488) internal successors, (431), 43 states have internal predecessors, (431), 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) [2023-11-23 22:43:15,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 23.0) internal successors, (1012), 44 states have internal predecessors, (1012), 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) [2023-11-23 22:43:15,035 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 23.0) internal successors, (1012), 44 states have internal predecessors, (1012), 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) [2023-11-23 22:43:15,035 INFO L175 Difference]: Start difference. First operand has 281 places, 866 transitions, 18878 flow. Second operand 43 states and 431 transitions. [2023-11-23 22:43:15,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1253 transitions, 28090 flow [2023-11-23 22:43:17,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1253 transitions, 27164 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-11-23 22:43:17,666 INFO L231 Difference]: Finished difference. Result has 327 places, 1092 transitions, 26433 flow [2023-11-23 22:43:17,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=18085, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26433, PETRI_PLACES=327, PETRI_TRANSITIONS=1092} [2023-11-23 22:43:17,668 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2023-11-23 22:43:17,668 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1092 transitions, 26433 flow [2023-11-23 22:43:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 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) [2023-11-23 22:43:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:17,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:17,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:43:17,890 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:43:17,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash -587321193, now seen corresponding path program 11 times [2023-11-23 22:43:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299525433] [2023-11-23 22:43:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:18,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299525433] [2023-11-23 22:43:18,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299525433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748286910] [2023-11-23 22:43:18,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:43:18,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:18,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:18,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf7b64c-b0be-43b1-a3a8-f43216ffda84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:43:18,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:43:18,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:18,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:43:18,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:18,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748286910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:18,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:43:18,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-23 22:43:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464157168] [2023-11-23 22:43:18,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:43:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:43:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:43:18,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-23 22:43:18,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1092 transitions, 26433 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 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) [2023-11-23 22:43:18,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:18,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-23 22:43:18,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand