./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme --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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:39,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:40,031 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:40,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:40,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:40,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:40,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:40,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:40,075 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:40,075 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:40,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:40,077 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:40,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:40,079 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:40,079 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:40,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:40,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:40,082 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:40,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:40,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:40,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:40,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:40,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:40,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:40,087 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:40,088 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:40,088 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:40,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:40,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:40,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:40,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:40,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:40,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:40,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:40,093 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:40,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:40,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:40,094 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:40,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:40,095 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:40,095 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:40,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:40,096 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_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2023-11-26 11:48:40,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:40,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:40,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:40,423 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:40,423 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:40,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-26 11:48:43,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:43,816 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:43,817 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-26 11:48:43,827 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/data/5528ae038/fa5d84f1199e4972891952a6ec6921aa/FLAG8cacf1403 [2023-11-26 11:48:43,844 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/data/5528ae038/fa5d84f1199e4972891952a6ec6921aa [2023-11-26 11:48:43,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:43,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:43,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:43,851 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:43,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:43,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99aa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:43, skipping insertion in model container [2023-11-26 11:48:43,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:43" (1/1) ... [2023-11-26 11:48:43,904 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:48:44,108 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_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-26 11:48:44,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:44,130 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:48:44,157 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_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-26 11:48:44,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:44,180 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:48:44,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44 WrapperNode [2023-11-26 11:48:44,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:44,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:44,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:48:44,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:48:44,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,201 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,229 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 135 [2023-11-26 11:48:44,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:44,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:48:44,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:48:44,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:48:44,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,247 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,264 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 2, 10, 2]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2023-11-26 11:48:44,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:48:44,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:48:44,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:48:44,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:48:44,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (1/1) ... [2023-11-26 11:48:44,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:44,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:44,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:48:44,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:48:44,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:48:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:48:44,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:48:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:48:44,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:48:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:48:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:48:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:48:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:48:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:48:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:48:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:48:44,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:48:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:48:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:48:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:48:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:48:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:48:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:48:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:48:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:48:44,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:48:44,395 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:48:44,527 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:48:44,530 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:48:44,948 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:48:45,425 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:48:45,425 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:48:45,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:45 BoogieIcfgContainer [2023-11-26 11:48:45,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:48:45,442 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:48:45,442 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:48:45,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:48:45,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:43" (1/3) ... [2023-11-26 11:48:45,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57453e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:45, skipping insertion in model container [2023-11-26 11:48:45,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:44" (2/3) ... [2023-11-26 11:48:45,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57453e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:45, skipping insertion in model container [2023-11-26 11:48:45,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:45" (3/3) ... [2023-11-26 11:48:45,453 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-26 11:48:45,466 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:48:45,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:45,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:48:45,481 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:48:45,565 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:48:45,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 84 flow [2023-11-26 11:48:45,683 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2023-11-26 11:48:45,683 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:48:45,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 8/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-26 11:48:45,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 84 flow [2023-11-26 11:48:45,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 32 transitions, 76 flow [2023-11-26 11:48:45,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:45,732 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;@4350cab9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:45,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:48:45,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:48:45,753 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2023-11-26 11:48:45,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:48:45,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:45,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:45,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1731729370, now seen corresponding path program 1 times [2023-11-26 11:48:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:45,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046404477] [2023-11-26 11:48:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:46,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:46,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046404477] [2023-11-26 11:48:46,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046404477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:46,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:46,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073802909] [2023-11-26 11:48:46,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:46,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:46,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:46,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:46,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-26 11:48:46,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:46,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:46,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:47,035 INFO L124 PetriNetUnfolderBase]: 282/462 cut-off events. [2023-11-26 11:48:47,036 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-26 11:48:47,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 462 events. 282/462 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1568 event pairs, 144 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 824. Up to 358 conditions per place. [2023-11-26 11:48:47,049 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 42 selfloop transitions, 1 changer transitions 8/52 dead transitions. [2023-11-26 11:48:47,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 52 transitions, 230 flow [2023-11-26 11:48:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:48:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-26 11:48:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-26 11:48:47,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-26 11:48:47,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-26 11:48:47,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:47,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-26 11:48:47,072 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) [2023-11-26 11:48:47,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:48:47,076 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:48:47,078 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 76 flow. Second operand 4 states and 65 transitions. [2023-11-26 11:48:47,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 52 transitions, 230 flow [2023-11-26 11:48:47,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:48:47,086 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 77 flow [2023-11-26 11:48:47,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-11-26 11:48:47,092 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-11-26 11:48:47,093 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 77 flow [2023-11-26 11:48:47,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-26 11:48:47,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:47,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:47,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:48:47,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:47,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1419590832, now seen corresponding path program 2 times [2023-11-26 11:48:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:47,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577401512] [2023-11-26 11:48:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:47,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:47,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577401512] [2023-11-26 11:48:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577401512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:47,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:47,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471649764] [2023-11-26 11:48:47,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:47,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:47,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-26 11:48:47,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:47,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:47,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:47,706 INFO L124 PetriNetUnfolderBase]: 328/557 cut-off events. [2023-11-26 11:48:47,706 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-26 11:48:47,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 557 events. 328/557 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2097 event pairs, 182 based on Foata normal form. 7/462 useless extension candidates. Maximal degree in co-relation 1166. Up to 422 conditions per place. [2023-11-26 11:48:47,717 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 42 selfloop transitions, 1 changer transitions 10/54 dead transitions. [2023-11-26 11:48:47,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 54 transitions, 237 flow [2023-11-26 11:48:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:48:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-26 11:48:47,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-26 11:48:47,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-26 11:48:47,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-26 11:48:47,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:47,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-26 11:48:47,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2023-11-26 11:48:47,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:48:47,729 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:48:47,729 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 77 flow. Second operand 4 states and 67 transitions. [2023-11-26 11:48:47,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 54 transitions, 237 flow [2023-11-26 11:48:47,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 231 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 11:48:47,735 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 83 flow [2023-11-26 11:48:47,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-26 11:48:47,737 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-26 11:48:47,737 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 83 flow [2023-11-26 11:48:47,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-11-26 11:48:47,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:47,738 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] [2023-11-26 11:48:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:48:47,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:47,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1626241867, now seen corresponding path program 1 times [2023-11-26 11:48:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:47,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035522436] [2023-11-26 11:48:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:47,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:47,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035522436] [2023-11-26 11:48:47,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035522436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:47,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:47,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:47,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342288395] [2023-11-26 11:48:47,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:47,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:47,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:47,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 83 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) [2023-11-26 11:48:47,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:47,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:47,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:47,958 INFO L124 PetriNetUnfolderBase]: 232/388 cut-off events. [2023-11-26 11:48:47,959 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-11-26 11:48:47,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 388 events. 232/388 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1243 event pairs, 79 based on Foata normal form. 22/344 useless extension candidates. Maximal degree in co-relation 834. Up to 317 conditions per place. [2023-11-26 11:48:47,962 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 34 selfloop transitions, 2 changer transitions 6/43 dead transitions. [2023-11-26 11:48:47,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 195 flow [2023-11-26 11:48:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:48:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-26 11:48:47,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2023-11-26 11:48:47,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-26 11:48:47,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-26 11:48:47,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:47,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-26 11:48:47,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-11-26 11:48:47,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:48:47,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-26 11:48:47,970 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 83 flow. Second operand 3 states and 53 transitions. [2023-11-26 11:48:47,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 195 flow [2023-11-26 11:48:47,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 192 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 11:48:47,975 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 86 flow [2023-11-26 11:48:47,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-26 11:48:47,977 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-26 11:48:47,977 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 86 flow [2023-11-26 11:48:47,978 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) [2023-11-26 11:48:47,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:47,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:47,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:48:47,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:47,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -356678929, now seen corresponding path program 1 times [2023-11-26 11:48:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:47,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540829805] [2023-11-26 11:48:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:47,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:48,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540829805] [2023-11-26 11:48:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540829805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:48,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:48:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762592891] [2023-11-26 11:48:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:48,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:48,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:48,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:48,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 86 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) [2023-11-26 11:48:48,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:48,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:48,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:48,779 INFO L124 PetriNetUnfolderBase]: 456/738 cut-off events. [2023-11-26 11:48:48,780 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2023-11-26 11:48:48,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 738 events. 456/738 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2695 event pairs, 200 based on Foata normal form. 1/599 useless extension candidates. Maximal degree in co-relation 606. Up to 304 conditions per place. [2023-11-26 11:48:48,786 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 65 selfloop transitions, 11 changer transitions 1/78 dead transitions. [2023-11-26 11:48:48,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 363 flow [2023-11-26 11:48:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:48:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2023-11-26 11:48:48,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2023-11-26 11:48:48,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 92 transitions. [2023-11-26 11:48:48,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 92 transitions. [2023-11-26 11:48:48,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:48,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 92 transitions. [2023-11-26 11:48:48,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2023-11-26 11:48:48,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:48:48,792 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:48:48,792 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 86 flow. Second operand 6 states and 92 transitions. [2023-11-26 11:48:48,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 363 flow [2023-11-26 11:48:48,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 343 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-26 11:48:48,796 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 153 flow [2023-11-26 11:48:48,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2023-11-26 11:48:48,797 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-11-26 11:48:48,798 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 153 flow [2023-11-26 11:48:48,798 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) [2023-11-26 11:48:48,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:48,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:48:48,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:48,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1802949554, now seen corresponding path program 1 times [2023-11-26 11:48:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307035272] [2023-11-26 11:48:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:49,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307035272] [2023-11-26 11:48:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307035272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904570984] [2023-11-26 11:48:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:49,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:49,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:49,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:49,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:48:49,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:50,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:51,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904570984] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:51,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:51,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-11-26 11:48:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654222865] [2023-11-26 11:48:51,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:51,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:48:51,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:48:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:48:51,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:51,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:48:51,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:51,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:51,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:52,526 INFO L124 PetriNetUnfolderBase]: 1146/1908 cut-off events. [2023-11-26 11:48:52,527 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2023-11-26 11:48:52,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 1908 events. 1146/1908 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9513 event pairs, 126 based on Foata normal form. 1/1732 useless extension candidates. Maximal degree in co-relation 2994. Up to 383 conditions per place. [2023-11-26 11:48:52,545 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 140 selfloop transitions, 44 changer transitions 8/193 dead transitions. [2023-11-26 11:48:52,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 193 transitions, 996 flow [2023-11-26 11:48:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:48:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:48:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2023-11-26 11:48:52,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494505494505494 [2023-11-26 11:48:52,549 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 207 transitions. [2023-11-26 11:48:52,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 207 transitions. [2023-11-26 11:48:52,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:52,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 207 transitions. [2023-11-26 11:48:52,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.923076923076923) internal successors, (207), 13 states have internal predecessors, (207), 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) [2023-11-26 11:48:52,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 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) [2023-11-26 11:48:52,554 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 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) [2023-11-26 11:48:52,554 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 153 flow. Second operand 13 states and 207 transitions. [2023-11-26 11:48:52,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 193 transitions, 996 flow [2023-11-26 11:48:52,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 193 transitions, 992 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-26 11:48:52,562 INFO L231 Difference]: Finished difference. Result has 60 places, 76 transitions, 493 flow [2023-11-26 11:48:52,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=493, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2023-11-26 11:48:52,564 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2023-11-26 11:48:52,564 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 493 flow [2023-11-26 11:48:52,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:48:52,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:52,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:52,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:52,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:52,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1457025946, now seen corresponding path program 2 times [2023-11-26 11:48:52,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:52,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112584582] [2023-11-26 11:48:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:53,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112584582] [2023-11-26 11:48:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112584582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713250671] [2023-11-26 11:48:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:53,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:53,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:53,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:53,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:53,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:48:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:53,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:48:53,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:53,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:53,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713250671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:53,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:53,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-26 11:48:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940328020] [2023-11-26 11:48:53,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:53,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:48:53,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:48:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:48:53,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:53,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 493 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:48:53,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:53,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:53,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:54,342 INFO L124 PetriNetUnfolderBase]: 1140/1908 cut-off events. [2023-11-26 11:48:54,343 INFO L125 PetriNetUnfolderBase]: For 2247/2247 co-relation queries the response was YES. [2023-11-26 11:48:54,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 1908 events. 1140/1908 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9428 event pairs, 180 based on Foata normal form. 1/1734 useless extension candidates. Maximal degree in co-relation 5738. Up to 1133 conditions per place. [2023-11-26 11:48:54,365 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 92 selfloop transitions, 40 changer transitions 8/141 dead transitions. [2023-11-26 11:48:54,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 141 transitions, 997 flow [2023-11-26 11:48:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:48:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:48:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2023-11-26 11:48:54,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2023-11-26 11:48:54,367 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 131 transitions. [2023-11-26 11:48:54,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 131 transitions. [2023-11-26 11:48:54,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:54,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 131 transitions. [2023-11-26 11:48:54,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 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) [2023-11-26 11:48:54,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:48:54,370 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:48:54,371 INFO L175 Difference]: Start difference. First operand has 60 places, 76 transitions, 493 flow. Second operand 9 states and 131 transitions. [2023-11-26 11:48:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 141 transitions, 997 flow [2023-11-26 11:48:54,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 141 transitions, 988 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:48:54,396 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 656 flow [2023-11-26 11:48:54,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=656, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2023-11-26 11:48:54,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2023-11-26 11:48:54,399 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 656 flow [2023-11-26 11:48:54,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:48:54,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:54,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:54,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:54,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:54,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:54,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1722066931, now seen corresponding path program 1 times [2023-11-26 11:48:54,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:54,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709784460] [2023-11-26 11:48:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:54,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709784460] [2023-11-26 11:48:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709784460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263694444] [2023-11-26 11:48:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:54,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:54,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:54,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:54,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:55,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:48:55,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:55,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263694444] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-11-26 11:48:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427957522] [2023-11-26 11:48:56,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:56,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:48:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:48:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:48:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:56,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 656 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:48:56,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:56,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:56,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:58,238 INFO L124 PetriNetUnfolderBase]: 1746/2949 cut-off events. [2023-11-26 11:48:58,239 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-11-26 11:48:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9590 conditions, 2949 events. 1746/2949 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16325 event pairs, 378 based on Foata normal form. 1/2686 useless extension candidates. Maximal degree in co-relation 9514. Up to 838 conditions per place. [2023-11-26 11:48:58,276 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 202 selfloop transitions, 52 changer transitions 9/264 dead transitions. [2023-11-26 11:48:58,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 264 transitions, 1949 flow [2023-11-26 11:48:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:48:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:48:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 255 transitions. [2023-11-26 11:48:58,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2023-11-26 11:48:58,280 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 255 transitions. [2023-11-26 11:48:58,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 255 transitions. [2023-11-26 11:48:58,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:58,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 255 transitions. [2023-11-26 11:48:58,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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) [2023-11-26 11:48:58,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 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) [2023-11-26 11:48:58,286 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 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) [2023-11-26 11:48:58,286 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 656 flow. Second operand 14 states and 255 transitions. [2023-11-26 11:48:58,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 264 transitions, 1949 flow [2023-11-26 11:48:58,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 264 transitions, 1863 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-26 11:48:58,342 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 900 flow [2023-11-26 11:48:58,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=900, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2023-11-26 11:48:58,343 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2023-11-26 11:48:58,343 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 900 flow [2023-11-26 11:48:58,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:48:58,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:58,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:58,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:48:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:58,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:58,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -812079388, now seen corresponding path program 1 times [2023-11-26 11:48:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:58,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671044808] [2023-11-26 11:48:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:58,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671044808] [2023-11-26 11:48:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671044808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:58,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:58,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:58,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718456895] [2023-11-26 11:48:58,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:58,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:58,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:58,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 900 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-26 11:48:58,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:58,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:58,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:59,266 INFO L124 PetriNetUnfolderBase]: 1356/2352 cut-off events. [2023-11-26 11:48:59,266 INFO L125 PetriNetUnfolderBase]: For 6403/6403 co-relation queries the response was YES. [2023-11-26 11:48:59,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8008 conditions, 2352 events. 1356/2352 cut-off events. For 6403/6403 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12802 event pairs, 771 based on Foata normal form. 0/2176 useless extension candidates. Maximal degree in co-relation 7936. Up to 1217 conditions per place. [2023-11-26 11:48:59,298 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 122 selfloop transitions, 14 changer transitions 6/143 dead transitions. [2023-11-26 11:48:59,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 143 transitions, 1404 flow [2023-11-26 11:48:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:48:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2023-11-26 11:48:59,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2023-11-26 11:48:59,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 86 transitions. [2023-11-26 11:48:59,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 86 transitions. [2023-11-26 11:48:59,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:59,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 86 transitions. [2023-11-26 11:48:59,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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) [2023-11-26 11:48:59,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:48:59,303 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:48:59,303 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 900 flow. Second operand 6 states and 86 transitions. [2023-11-26 11:48:59,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 143 transitions, 1404 flow [2023-11-26 11:48:59,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 1315 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-26 11:48:59,340 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 780 flow [2023-11-26 11:48:59,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2023-11-26 11:48:59,345 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2023-11-26 11:48:59,347 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 780 flow [2023-11-26 11:48:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-26 11:48:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:59,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:48:59,352 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:48:59,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2036433494, now seen corresponding path program 1 times [2023-11-26 11:48:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:59,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048055247] [2023-11-26 11:48:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:59,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:59,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048055247] [2023-11-26 11:48:59,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048055247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:59,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648927284] [2023-11-26 11:48:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:59,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:59,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:48:59,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 780 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-26 11:48:59,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:59,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:48:59,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:00,045 INFO L124 PetriNetUnfolderBase]: 1044/1869 cut-off events. [2023-11-26 11:49:00,046 INFO L125 PetriNetUnfolderBase]: For 4989/4989 co-relation queries the response was YES. [2023-11-26 11:49:00,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6549 conditions, 1869 events. 1044/1869 cut-off events. For 4989/4989 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10065 event pairs, 599 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 5640. Up to 1217 conditions per place. [2023-11-26 11:49:00,071 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 92 selfloop transitions, 10 changer transitions 14/117 dead transitions. [2023-11-26 11:49:00,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 117 transitions, 1110 flow [2023-11-26 11:49:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:49:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:49:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2023-11-26 11:49:00,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-11-26 11:49:00,073 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 80 transitions. [2023-11-26 11:49:00,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 80 transitions. [2023-11-26 11:49:00,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:00,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 80 transitions. [2023-11-26 11:49:00,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2023-11-26 11:49:00,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:49:00,075 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-26 11:49:00,076 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 780 flow. Second operand 6 states and 80 transitions. [2023-11-26 11:49:00,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 117 transitions, 1110 flow [2023-11-26 11:49:00,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 117 transitions, 1096 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-26 11:49:00,103 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 653 flow [2023-11-26 11:49:00,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2023-11-26 11:49:00,105 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2023-11-26 11:49:00,105 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 653 flow [2023-11-26 11:49:00,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-26 11:49:00,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:00,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:00,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:49:00,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:00,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:00,108 INFO L85 PathProgramCache]: Analyzing trace with hash 755538932, now seen corresponding path program 3 times [2023-11-26 11:49:00,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806140407] [2023-11-26 11:49:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:00,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:00,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806140407] [2023-11-26 11:49:00,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806140407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:00,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147868902] [2023-11-26 11:49:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:49:00,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:00,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:00,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:49:00,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 11:49:00,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:00,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:49:00,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:01,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:01,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147868902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:01,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:49:01,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-26 11:49:01,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063754453] [2023-11-26 11:49:01,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:01,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:49:01,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:01,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:49:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:49:01,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:01,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 653 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:49:01,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:01,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:01,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:01,669 INFO L124 PetriNetUnfolderBase]: 900/1569 cut-off events. [2023-11-26 11:49:01,669 INFO L125 PetriNetUnfolderBase]: For 4757/4757 co-relation queries the response was YES. [2023-11-26 11:49:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5836 conditions, 1569 events. 900/1569 cut-off events. For 4757/4757 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7882 event pairs, 204 based on Foata normal form. 1/1568 useless extension candidates. Maximal degree in co-relation 5777. Up to 1004 conditions per place. [2023-11-26 11:49:01,694 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 100 selfloop transitions, 30 changer transitions 8/139 dead transitions. [2023-11-26 11:49:01,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 139 transitions, 1152 flow [2023-11-26 11:49:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:49:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2023-11-26 11:49:01,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2023-11-26 11:49:01,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 131 transitions. [2023-11-26 11:49:01,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 131 transitions. [2023-11-26 11:49:01,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:01,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 131 transitions. [2023-11-26 11:49:01,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 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) [2023-11-26 11:49:01,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:01,699 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:01,699 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 653 flow. Second operand 9 states and 131 transitions. [2023-11-26 11:49:01,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 139 transitions, 1152 flow [2023-11-26 11:49:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 139 transitions, 1100 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-26 11:49:01,734 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 653 flow [2023-11-26 11:49:01,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2023-11-26 11:49:01,736 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2023-11-26 11:49:01,736 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 653 flow [2023-11-26 11:49:01,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:49:01,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:01,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:01,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:49:01,944 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:01,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1598185242, now seen corresponding path program 4 times [2023-11-26 11:49:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734875354] [2023-11-26 11:49:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:01,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734875354] [2023-11-26 11:49:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734875354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269923809] [2023-11-26 11:49:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:49:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:02,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:02,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:49:02,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:49:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:02,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:49:02,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:03,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:03,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269923809] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:03,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:03,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 24 [2023-11-26 11:49:03,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677459585] [2023-11-26 11:49:03,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:03,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:49:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:49:03,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:49:03,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:03,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:49:03,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:03,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:03,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:04,991 INFO L124 PetriNetUnfolderBase]: 1357/2366 cut-off events. [2023-11-26 11:49:04,991 INFO L125 PetriNetUnfolderBase]: For 6139/6139 co-relation queries the response was YES. [2023-11-26 11:49:05,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8402 conditions, 2366 events. 1357/2366 cut-off events. For 6139/6139 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13064 event pairs, 196 based on Foata normal form. 2/2366 useless extension candidates. Maximal degree in co-relation 8333. Up to 514 conditions per place. [2023-11-26 11:49:05,026 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 150 selfloop transitions, 62 changer transitions 9/222 dead transitions. [2023-11-26 11:49:05,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 222 transitions, 1874 flow [2023-11-26 11:49:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:49:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 11:49:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 216 transitions. [2023-11-26 11:49:05,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114285714285714 [2023-11-26 11:49:05,029 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 216 transitions. [2023-11-26 11:49:05,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 216 transitions. [2023-11-26 11:49:05,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:05,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 216 transitions. [2023-11-26 11:49:05,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 14.4) internal successors, (216), 15 states have internal predecessors, (216), 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) [2023-11-26 11:49:05,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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) [2023-11-26 11:49:05,033 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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) [2023-11-26 11:49:05,033 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 653 flow. Second operand 15 states and 216 transitions. [2023-11-26 11:49:05,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 222 transitions, 1874 flow [2023-11-26 11:49:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 222 transitions, 1766 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-26 11:49:05,071 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 1063 flow [2023-11-26 11:49:05,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1063, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2023-11-26 11:49:05,072 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-11-26 11:49:05,072 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 1063 flow [2023-11-26 11:49:05,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:49:05,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:05,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:05,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:05,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:05,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1781017511, now seen corresponding path program 2 times [2023-11-26 11:49:05,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:05,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984577650] [2023-11-26 11:49:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:05,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984577650] [2023-11-26 11:49:05,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984577650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505092232] [2023-11-26 11:49:05,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:49:05,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:05,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:05,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:05,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:49:05,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:49:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:05,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:49:05,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:06,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:06,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505092232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:06,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:49:06,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2023-11-26 11:49:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585722299] [2023-11-26 11:49:06,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:06,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:49:06,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:06,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 1063 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2023-11-26 11:49:06,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:06,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:06,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:06,944 INFO L124 PetriNetUnfolderBase]: 1337/2333 cut-off events. [2023-11-26 11:49:06,945 INFO L125 PetriNetUnfolderBase]: For 9006/9006 co-relation queries the response was YES. [2023-11-26 11:49:06,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9310 conditions, 2333 events. 1337/2333 cut-off events. For 9006/9006 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12731 event pairs, 375 based on Foata normal form. 1/2332 useless extension candidates. Maximal degree in co-relation 9234. Up to 1611 conditions per place. [2023-11-26 11:49:06,978 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 95 selfloop transitions, 44 changer transitions 13/153 dead transitions. [2023-11-26 11:49:06,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 1594 flow [2023-11-26 11:49:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:49:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2023-11-26 11:49:06,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2023-11-26 11:49:06,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 114 transitions. [2023-11-26 11:49:06,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 114 transitions. [2023-11-26 11:49:06,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:06,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 114 transitions. [2023-11-26 11:49:06,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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) [2023-11-26 11:49:06,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:06,983 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:06,984 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 1063 flow. Second operand 9 states and 114 transitions. [2023-11-26 11:49:06,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 1594 flow [2023-11-26 11:49:07,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1452 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-26 11:49:07,045 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 1087 flow [2023-11-26 11:49:07,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1087, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2023-11-26 11:49:07,046 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2023-11-26 11:49:07,047 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 1087 flow [2023-11-26 11:49:07,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2023-11-26 11:49:07,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:07,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:07,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:49:07,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:07,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash -14411879, now seen corresponding path program 3 times [2023-11-26 11:49:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:07,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002677876] [2023-11-26 11:49:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:07,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002677876] [2023-11-26 11:49:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002677876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987917083] [2023-11-26 11:49:07,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:49:07,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:07,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:07,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:49:07,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 11:49:07,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:07,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:49:07,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:08,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987917083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:49:08,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2023-11-26 11:49:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582476795] [2023-11-26 11:49:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:08,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:49:08,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:08,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 1087 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2023-11-26 11:49:08,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:08,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:08,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:08,741 INFO L124 PetriNetUnfolderBase]: 1307/2270 cut-off events. [2023-11-26 11:49:08,742 INFO L125 PetriNetUnfolderBase]: For 8286/8286 co-relation queries the response was YES. [2023-11-26 11:49:08,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9114 conditions, 2270 events. 1307/2270 cut-off events. For 8286/8286 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12232 event pairs, 369 based on Foata normal form. 1/2269 useless extension candidates. Maximal degree in co-relation 9001. Up to 1561 conditions per place. [2023-11-26 11:49:08,768 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 89 selfloop transitions, 42 changer transitions 19/151 dead transitions. [2023-11-26 11:49:08,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 1568 flow [2023-11-26 11:49:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:49:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2023-11-26 11:49:08,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2023-11-26 11:49:08,770 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 114 transitions. [2023-11-26 11:49:08,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 114 transitions. [2023-11-26 11:49:08,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:08,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 114 transitions. [2023-11-26 11:49:08,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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) [2023-11-26 11:49:08,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:08,776 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:08,777 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 1087 flow. Second operand 9 states and 114 transitions. [2023-11-26 11:49:08,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 1568 flow [2023-11-26 11:49:08,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1443 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-26 11:49:08,829 INFO L231 Difference]: Finished difference. Result has 109 places, 107 transitions, 1048 flow [2023-11-26 11:49:08,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1048, PETRI_PLACES=109, PETRI_TRANSITIONS=107} [2023-11-26 11:49:08,830 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2023-11-26 11:49:08,831 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 1048 flow [2023-11-26 11:49:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2023-11-26 11:49:08,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:08,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:08,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:49:09,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:09,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1251685580, now seen corresponding path program 5 times [2023-11-26 11:49:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:09,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096368707] [2023-11-26 11:49:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:09,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096368707] [2023-11-26 11:49:09,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096368707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:09,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714323818] [2023-11-26 11:49:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:49:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:09,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:09,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:49:09,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:49:09,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:09,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:49:09,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:09,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714323818] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:10,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:10,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-11-26 11:49:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406412229] [2023-11-26 11:49:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:49:10,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:49:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:49:10,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:10,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 1048 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:49:10,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:10,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:10,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:12,316 INFO L124 PetriNetUnfolderBase]: 1381/2436 cut-off events. [2023-11-26 11:49:12,316 INFO L125 PetriNetUnfolderBase]: For 8490/8490 co-relation queries the response was YES. [2023-11-26 11:49:12,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9630 conditions, 2436 events. 1381/2436 cut-off events. For 8490/8490 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13531 event pairs, 249 based on Foata normal form. 2/2436 useless extension candidates. Maximal degree in co-relation 8873. Up to 700 conditions per place. [2023-11-26 11:49:12,341 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 162 selfloop transitions, 55 changer transitions 14/232 dead transitions. [2023-11-26 11:49:12,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 232 transitions, 2222 flow [2023-11-26 11:49:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:49:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:49:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2023-11-26 11:49:12,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432967032967033 [2023-11-26 11:49:12,345 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 197 transitions. [2023-11-26 11:49:12,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 197 transitions. [2023-11-26 11:49:12,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:12,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 197 transitions. [2023-11-26 11:49:12,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.153846153846153) internal successors, (197), 13 states have internal predecessors, (197), 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) [2023-11-26 11:49:12,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 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) [2023-11-26 11:49:12,348 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 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) [2023-11-26 11:49:12,348 INFO L175 Difference]: Start difference. First operand has 109 places, 107 transitions, 1048 flow. Second operand 13 states and 197 transitions. [2023-11-26 11:49:12,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 232 transitions, 2222 flow [2023-11-26 11:49:12,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 232 transitions, 2094 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-26 11:49:12,400 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 1133 flow [2023-11-26 11:49:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1133, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2023-11-26 11:49:12,401 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2023-11-26 11:49:12,401 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 1133 flow [2023-11-26 11:49:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:49:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:12,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:12,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:12,608 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:12,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1192318220, now seen corresponding path program 6 times [2023-11-26 11:49:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:12,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663150252] [2023-11-26 11:49:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:12,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:12,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663150252] [2023-11-26 11:49:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663150252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054675284] [2023-11-26 11:49:12,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:49:12,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:12,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:12,926 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:12,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:49:13,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-26 11:49:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:13,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:49:13,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:13,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:13,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054675284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:13,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:49:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-26 11:49:13,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41900664] [2023-11-26 11:49:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:49:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:49:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:49:13,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:13,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 1133 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:49:13,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:13,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:13,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:13,929 INFO L124 PetriNetUnfolderBase]: 1359/2384 cut-off events. [2023-11-26 11:49:13,930 INFO L125 PetriNetUnfolderBase]: For 10182/10182 co-relation queries the response was YES. [2023-11-26 11:49:13,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9575 conditions, 2384 events. 1359/2384 cut-off events. For 10182/10182 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13134 event pairs, 327 based on Foata normal form. 2/2384 useless extension candidates. Maximal degree in co-relation 9498. Up to 1542 conditions per place. [2023-11-26 11:49:13,958 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 110 selfloop transitions, 47 changer transitions 12/170 dead transitions. [2023-11-26 11:49:13,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1796 flow [2023-11-26 11:49:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:49:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2023-11-26 11:49:13,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39365079365079364 [2023-11-26 11:49:13,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 124 transitions. [2023-11-26 11:49:13,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 124 transitions. [2023-11-26 11:49:13,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:13,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 124 transitions. [2023-11-26 11:49:13,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 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) [2023-11-26 11:49:13,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:13,962 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:13,962 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 1133 flow. Second operand 9 states and 124 transitions. [2023-11-26 11:49:13,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1796 flow [2023-11-26 11:49:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1731 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-26 11:49:14,016 INFO L231 Difference]: Finished difference. Result has 116 places, 111 transitions, 1170 flow [2023-11-26 11:49:14,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1170, PETRI_PLACES=116, PETRI_TRANSITIONS=111} [2023-11-26 11:49:14,017 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2023-11-26 11:49:14,018 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 111 transitions, 1170 flow [2023-11-26 11:49:14,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:49:14,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:14,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:14,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:14,224 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:14,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 613053757, now seen corresponding path program 4 times [2023-11-26 11:49:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652861670] [2023-11-26 11:49:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:14,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652861670] [2023-11-26 11:49:14,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652861670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878267583] [2023-11-26 11:49:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:49:14,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:14,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:49:14,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:49:14,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:14,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:49:14,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:14,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878267583] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:15,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:15,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 10] total 26 [2023-11-26 11:49:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042787799] [2023-11-26 11:49:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:49:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:49:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:49:15,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:15,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 111 transitions, 1170 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:49:15,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:15,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:16,716 INFO L124 PetriNetUnfolderBase]: 1339/2336 cut-off events. [2023-11-26 11:49:16,716 INFO L125 PetriNetUnfolderBase]: For 10318/10318 co-relation queries the response was YES. [2023-11-26 11:49:16,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9646 conditions, 2336 events. 1339/2336 cut-off events. For 10318/10318 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12775 event pairs, 289 based on Foata normal form. 1/2335 useless extension candidates. Maximal degree in co-relation 9572. Up to 1016 conditions per place. [2023-11-26 11:49:16,738 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 165 selfloop transitions, 65 changer transitions 12/243 dead transitions. [2023-11-26 11:49:16,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 243 transitions, 2364 flow [2023-11-26 11:49:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:49:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 11:49:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 226 transitions. [2023-11-26 11:49:16,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43047619047619046 [2023-11-26 11:49:16,741 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 226 transitions. [2023-11-26 11:49:16,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 226 transitions. [2023-11-26 11:49:16,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:16,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 226 transitions. [2023-11-26 11:49:16,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 15.066666666666666) internal successors, (226), 15 states have internal predecessors, (226), 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) [2023-11-26 11:49:16,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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) [2023-11-26 11:49:16,744 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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) [2023-11-26 11:49:16,744 INFO L175 Difference]: Start difference. First operand has 116 places, 111 transitions, 1170 flow. Second operand 15 states and 226 transitions. [2023-11-26 11:49:16,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 243 transitions, 2364 flow [2023-11-26 11:49:16,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 243 transitions, 2263 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-26 11:49:16,803 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 1378 flow [2023-11-26 11:49:16,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1378, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2023-11-26 11:49:16,804 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2023-11-26 11:49:16,804 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 1378 flow [2023-11-26 11:49:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2023-11-26 11:49:16,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:16,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:16,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:17,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:49:17,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:17,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash -900001537, now seen corresponding path program 5 times [2023-11-26 11:49:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:17,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300746946] [2023-11-26 11:49:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:17,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:17,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300746946] [2023-11-26 11:49:17,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300746946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:17,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717411061] [2023-11-26 11:49:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:49:17,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:17,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:17,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:49:17,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:49:17,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:17,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:49:17,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:17,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717411061] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:18,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:18,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-11-26 11:49:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934795333] [2023-11-26 11:49:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:49:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:49:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:49:18,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:18,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 1378 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:49:18,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:18,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:18,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:19,554 INFO L124 PetriNetUnfolderBase]: 1312/2281 cut-off events. [2023-11-26 11:49:19,554 INFO L125 PetriNetUnfolderBase]: For 11742/11742 co-relation queries the response was YES. [2023-11-26 11:49:19,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10022 conditions, 2281 events. 1312/2281 cut-off events. For 11742/11742 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12319 event pairs, 374 based on Foata normal form. 1/2280 useless extension candidates. Maximal degree in co-relation 9943. Up to 1578 conditions per place. [2023-11-26 11:49:19,570 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 101 selfloop transitions, 39 changer transitions 22/163 dead transitions. [2023-11-26 11:49:19,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 163 transitions, 1865 flow [2023-11-26 11:49:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:49:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:49:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2023-11-26 11:49:19,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047619047619048 [2023-11-26 11:49:19,574 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 128 transitions. [2023-11-26 11:49:19,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 128 transitions. [2023-11-26 11:49:19,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:19,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 128 transitions. [2023-11-26 11:49:19,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 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) [2023-11-26 11:49:19,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 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) [2023-11-26 11:49:19,576 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 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) [2023-11-26 11:49:19,577 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 1378 flow. Second operand 12 states and 128 transitions. [2023-11-26 11:49:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 163 transitions, 1865 flow [2023-11-26 11:49:19,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 163 transitions, 1707 flow, removed 21 selfloop flow, removed 13 redundant places. [2023-11-26 11:49:19,641 INFO L231 Difference]: Finished difference. Result has 126 places, 114 transitions, 1221 flow [2023-11-26 11:49:19,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1221, PETRI_PLACES=126, PETRI_TRANSITIONS=114} [2023-11-26 11:49:19,642 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2023-11-26 11:49:19,642 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 114 transitions, 1221 flow [2023-11-26 11:49:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 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) [2023-11-26 11:49:19,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:19,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:19,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:19,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:49:19,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:19,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1962269031, now seen corresponding path program 6 times [2023-11-26 11:49:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:19,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260631016] [2023-11-26 11:49:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:20,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:20,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260631016] [2023-11-26 11:49:20,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260631016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:20,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416345580] [2023-11-26 11:49:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:49:20,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:20,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:20,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:49:20,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-26 11:49:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:20,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:49:20,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:20,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:20,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416345580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:20,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:49:20,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2023-11-26 11:49:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774500370] [2023-11-26 11:49:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:20,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:49:20,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:20,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 114 transitions, 1221 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2023-11-26 11:49:20,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:20,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:20,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:21,043 INFO L124 PetriNetUnfolderBase]: 1267/2191 cut-off events. [2023-11-26 11:49:21,043 INFO L125 PetriNetUnfolderBase]: For 10034/10034 co-relation queries the response was YES. [2023-11-26 11:49:21,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9434 conditions, 2191 events. 1267/2191 cut-off events. For 10034/10034 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11670 event pairs, 376 based on Foata normal form. 1/2190 useless extension candidates. Maximal degree in co-relation 9363. Up to 1578 conditions per place. [2023-11-26 11:49:21,055 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 80 selfloop transitions, 34 changer transitions 26/141 dead transitions. [2023-11-26 11:49:21,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 141 transitions, 1596 flow [2023-11-26 11:49:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:49:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2023-11-26 11:49:21,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32063492063492066 [2023-11-26 11:49:21,057 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 101 transitions. [2023-11-26 11:49:21,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 101 transitions. [2023-11-26 11:49:21,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:21,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 101 transitions. [2023-11-26 11:49:21,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:21,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:21,059 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2023-11-26 11:49:21,059 INFO L175 Difference]: Start difference. First operand has 126 places, 114 transitions, 1221 flow. Second operand 9 states and 101 transitions. [2023-11-26 11:49:21,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 141 transitions, 1596 flow [2023-11-26 11:49:21,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 141 transitions, 1507 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-11-26 11:49:21,106 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 1158 flow [2023-11-26 11:49:21,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1158, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2023-11-26 11:49:21,107 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2023-11-26 11:49:21,107 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 1158 flow [2023-11-26 11:49:21,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2023-11-26 11:49:21,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:21,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:21,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:21,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:49:21,313 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:21,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -626985642, now seen corresponding path program 1 times [2023-11-26 11:49:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:21,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634603377] [2023-11-26 11:49:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:21,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634603377] [2023-11-26 11:49:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634603377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80737549] [2023-11-26 11:49:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:21,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:21,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:49:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:21,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:49:21,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:21,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80737549] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:21,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:21,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-26 11:49:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657722507] [2023-11-26 11:49:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:21,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:21,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:49:21,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:21,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 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) [2023-11-26 11:49:21,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:21,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:22,315 INFO L124 PetriNetUnfolderBase]: 1314/2256 cut-off events. [2023-11-26 11:49:22,315 INFO L125 PetriNetUnfolderBase]: For 10123/10123 co-relation queries the response was YES. [2023-11-26 11:49:22,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9879 conditions, 2256 events. 1314/2256 cut-off events. For 10123/10123 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12088 event pairs, 666 based on Foata normal form. 40/2295 useless extension candidates. Maximal degree in co-relation 9826. Up to 1058 conditions per place. [2023-11-26 11:49:22,338 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 160 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2023-11-26 11:49:22,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 174 transitions, 2104 flow [2023-11-26 11:49:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:49:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2023-11-26 11:49:22,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2023-11-26 11:49:22,339 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 106 transitions. [2023-11-26 11:49:22,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 106 transitions. [2023-11-26 11:49:22,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:22,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 106 transitions. [2023-11-26 11:49:22,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.25) internal successors, (106), 8 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) [2023-11-26 11:49:22,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 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) [2023-11-26 11:49:22,341 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 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) [2023-11-26 11:49:22,341 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 1158 flow. Second operand 8 states and 106 transitions. [2023-11-26 11:49:22,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 174 transitions, 2104 flow [2023-11-26 11:49:22,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 174 transitions, 1879 flow, removed 32 selfloop flow, removed 11 redundant places. [2023-11-26 11:49:22,396 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 1102 flow [2023-11-26 11:49:22,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1102, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2023-11-26 11:49:22,397 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2023-11-26 11:49:22,397 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 1102 flow [2023-11-26 11:49:22,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 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) [2023-11-26 11:49:22,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:22,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:22,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:22,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:22,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1246142561, now seen corresponding path program 1 times [2023-11-26 11:49:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:22,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77816079] [2023-11-26 11:49:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:22,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:22,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77816079] [2023-11-26 11:49:22,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77816079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:22,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:22,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:49:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063905328] [2023-11-26 11:49:22,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:22,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:22,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:22,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:22,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 1102 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-26 11:49:22,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:22,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:22,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:23,127 INFO L124 PetriNetUnfolderBase]: 828/1446 cut-off events. [2023-11-26 11:49:23,127 INFO L125 PetriNetUnfolderBase]: For 6176/6176 co-relation queries the response was YES. [2023-11-26 11:49:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6326 conditions, 1446 events. 828/1446 cut-off events. For 6176/6176 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6966 event pairs, 514 based on Foata normal form. 38/1483 useless extension candidates. Maximal degree in co-relation 6276. Up to 908 conditions per place. [2023-11-26 11:49:23,140 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 96 selfloop transitions, 10 changer transitions 8/115 dead transitions. [2023-11-26 11:49:23,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 1207 flow [2023-11-26 11:49:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:49:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2023-11-26 11:49:23,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514285714285714 [2023-11-26 11:49:23,142 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2023-11-26 11:49:23,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2023-11-26 11:49:23,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:23,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2023-11-26 11:49:23,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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) [2023-11-26 11:49:23,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:23,143 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:23,143 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 1102 flow. Second operand 5 states and 79 transitions. [2023-11-26 11:49:23,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 1207 flow [2023-11-26 11:49:23,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 115 transitions, 1201 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:49:23,172 INFO L231 Difference]: Finished difference. Result has 108 places, 88 transitions, 829 flow [2023-11-26 11:49:23,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=108, PETRI_TRANSITIONS=88} [2023-11-26 11:49:23,173 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2023-11-26 11:49:23,173 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 88 transitions, 829 flow [2023-11-26 11:49:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-26 11:49:23,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:23,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:23,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:49:23,174 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:23,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1438137167, now seen corresponding path program 1 times [2023-11-26 11:49:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:23,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631292958] [2023-11-26 11:49:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:23,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:23,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:23,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631292958] [2023-11-26 11:49:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631292958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:23,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:49:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510273981] [2023-11-26 11:49:23,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:23,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:23,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:23,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 88 transitions, 829 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-26 11:49:23,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:23,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:23,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:23,505 INFO L124 PetriNetUnfolderBase]: 647/1148 cut-off events. [2023-11-26 11:49:23,505 INFO L125 PetriNetUnfolderBase]: For 5052/5052 co-relation queries the response was YES. [2023-11-26 11:49:23,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5077 conditions, 1148 events. 647/1148 cut-off events. For 5052/5052 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5279 event pairs, 417 based on Foata normal form. 32/1179 useless extension candidates. Maximal degree in co-relation 5027. Up to 908 conditions per place. [2023-11-26 11:49:23,511 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 54 selfloop transitions, 2 changer transitions 30/87 dead transitions. [2023-11-26 11:49:23,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 87 transitions, 876 flow [2023-11-26 11:49:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:49:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2023-11-26 11:49:23,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942857142857143 [2023-11-26 11:49:23,513 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 69 transitions. [2023-11-26 11:49:23,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 69 transitions. [2023-11-26 11:49:23,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:23,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 69 transitions. [2023-11-26 11:49:23,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2023-11-26 11:49:23,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:23,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:23,514 INFO L175 Difference]: Start difference. First operand has 108 places, 88 transitions, 829 flow. Second operand 5 states and 69 transitions. [2023-11-26 11:49:23,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 87 transitions, 876 flow [2023-11-26 11:49:23,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 781 flow, removed 10 selfloop flow, removed 18 redundant places. [2023-11-26 11:49:23,530 INFO L231 Difference]: Finished difference. Result has 88 places, 57 transitions, 394 flow [2023-11-26 11:49:23,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=88, PETRI_TRANSITIONS=57} [2023-11-26 11:49:23,530 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2023-11-26 11:49:23,530 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 394 flow [2023-11-26 11:49:23,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-26 11:49:23,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:23,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:23,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:49:23,532 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:23,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1755063999, now seen corresponding path program 1 times [2023-11-26 11:49:23,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:23,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068600999] [2023-11-26 11:49:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068600999] [2023-11-26 11:49:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068600999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667683805] [2023-11-26 11:49:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:23,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:23,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:23,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:49:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:49:23,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:23,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:24,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667683805] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:24,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:24,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-26 11:49:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906295189] [2023-11-26 11:49:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:24,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:49:24,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2023-11-26 11:49:24,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2023-11-26 11:49:24,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:24,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2023-11-26 11:49:24,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:24,208 INFO L124 PetriNetUnfolderBase]: 384/651 cut-off events. [2023-11-26 11:49:24,208 INFO L125 PetriNetUnfolderBase]: For 2193/2193 co-relation queries the response was YES. [2023-11-26 11:49:24,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2749 conditions, 651 events. 384/651 cut-off events. For 2193/2193 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2374 event pairs, 199 based on Foata normal form. 20/670 useless extension candidates. Maximal degree in co-relation 2723. Up to 472 conditions per place. [2023-11-26 11:49:24,214 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 50 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2023-11-26 11:49:24,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 63 transitions, 550 flow [2023-11-26 11:49:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:49:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:49:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2023-11-26 11:49:24,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2693877551020408 [2023-11-26 11:49:24,215 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 66 transitions. [2023-11-26 11:49:24,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 66 transitions. [2023-11-26 11:49:24,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:24,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 66 transitions. [2023-11-26 11:49:24,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2023-11-26 11:49:24,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 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) [2023-11-26 11:49:24,218 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 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) [2023-11-26 11:49:24,220 INFO L175 Difference]: Start difference. First operand has 88 places, 57 transitions, 394 flow. Second operand 7 states and 66 transitions. [2023-11-26 11:49:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 63 transitions, 550 flow [2023-11-26 11:49:24,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 472 flow, removed 21 selfloop flow, removed 13 redundant places. [2023-11-26 11:49:24,227 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 317 flow [2023-11-26 11:49:24,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2023-11-26 11:49:24,228 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2023-11-26 11:49:24,228 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 317 flow [2023-11-26 11:49:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2023-11-26 11:49:24,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:24,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:24,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:24,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:49:24,434 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:49:24,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1127382352, now seen corresponding path program 1 times [2023-11-26 11:49:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:24,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338461174] [2023-11-26 11:49:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:24,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:25,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338461174] [2023-11-26 11:49:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338461174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976083077] [2023-11-26 11:49:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:25,779 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:25,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f98e1-ca6c-405f-bfd8-dc1d8b64a8f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:49:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:25,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-26 11:49:25,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:26,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1