./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya --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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:15:29,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:15:29,347 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:15:29,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:15:29,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:15:29,377 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:15:29,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:15:29,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:15:29,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:15:29,380 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:15:29,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:15:29,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:15:29,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:15:29,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:15:29,383 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:15:29,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:15:29,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:15:29,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:15:29,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:15:29,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:15:29,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:15:29,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:15:29,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:15:29,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:15:29,389 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:15:29,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:15:29,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:15:29,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:15:29,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:15:29,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:15:29,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:15:29,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:15:29,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:15:29,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:15:29,393 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:15:29,393 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:15:29,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:15:29,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:15:29,394 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:15:29,394 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:15:29,394 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:15:29,394 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:15:29,394 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_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2023-11-29 05:15:29,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:15:29,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:15:29,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:15:29,664 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:15:29,665 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:15:29,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-29 05:15:32,504 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:15:32,718 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:15:32,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-29 05:15:32,729 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/data/46ec32f42/a1a29ee0eab346dd96ca5ecac838316d/FLAGc343215f7 [2023-11-29 05:15:32,743 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/data/46ec32f42/a1a29ee0eab346dd96ca5ecac838316d [2023-11-29 05:15:32,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:15:32,748 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:15:32,749 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:15:32,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:15:32,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:15:32,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:15:32" (1/1) ... [2023-11-29 05:15:32,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437225c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:32, skipping insertion in model container [2023-11-29 05:15:32,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:15:32" (1/1) ... [2023-11-29 05:15:32,791 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:15:32,979 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_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3384,3397] [2023-11-29 05:15:32,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:15:33,004 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:15:33,037 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_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3384,3397] [2023-11-29 05:15:33,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:15:33,060 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:15:33,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33 WrapperNode [2023-11-29 05:15:33,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:15:33,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:15:33,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:15:33,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:15:33,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,116 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 187 [2023-11-29 05:15:33,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:15:33,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:15:33,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:15:33,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:15:33,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,151 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 15, 2, 2, 2]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2023-11-29 05:15:33,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,175 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:15:33,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:15:33,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:15:33,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:15:33,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (1/1) ... [2023-11-29 05:15:33,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:15:33,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:15:33,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:15:33,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:15:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:15:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:15:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:15:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:15:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:15:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:15:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:15:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:15:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:15:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:15:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:15:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:15:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:15:33,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:15:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:15:33,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:15:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:15:33,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:15:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:15:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:15:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:15:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:15:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:15:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:15:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:15:33,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:15:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:15:33,266 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:15:33,413 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:15:33,415 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:15:33,875 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:15:34,234 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:15:34,234 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 05:15:34,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:15:34 BoogieIcfgContainer [2023-11-29 05:15:34,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:15:34,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:15:34,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:15:34,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:15:34,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:15:32" (1/3) ... [2023-11-29 05:15:34,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b508c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:15:34, skipping insertion in model container [2023-11-29 05:15:34,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:15:33" (2/3) ... [2023-11-29 05:15:34,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b508c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:15:34, skipping insertion in model container [2023-11-29 05:15:34,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:15:34" (3/3) ... [2023-11-29 05:15:34,243 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-11-29 05:15:34,253 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:15:34,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:15:34,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:15:34,262 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:15:34,321 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:15:34,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 51 transitions, 123 flow [2023-11-29 05:15:34,390 INFO L124 PetriNetUnfolderBase]: 12/48 cut-off events. [2023-11-29 05:15:34,391 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:15:34,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 12/48 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-29 05:15:34,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 51 transitions, 123 flow [2023-11-29 05:15:34,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 47 transitions, 112 flow [2023-11-29 05:15:34,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:15:34,415 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;@3a02da68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:15:34,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:15:34,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:15:34,434 INFO L124 PetriNetUnfolderBase]: 12/46 cut-off events. [2023-11-29 05:15:34,434 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:15:34,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:34,435 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] [2023-11-29 05:15:34,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:34,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 149974792, now seen corresponding path program 1 times [2023-11-29 05:15:34,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:34,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259828414] [2023-11-29 05:15:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:34,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:34,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259828414] [2023-11-29 05:15:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259828414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:34,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:34,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:15:34,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022579799] [2023-11-29 05:15:34,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:15:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:15:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:15:34,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:34,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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) [2023-11-29 05:15:34,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:34,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:34,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:35,790 INFO L124 PetriNetUnfolderBase]: 4008/5380 cut-off events. [2023-11-29 05:15:35,791 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2023-11-29 05:15:35,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11040 conditions, 5380 events. 4008/5380 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22219 event pairs, 1782 based on Foata normal form. 1/3956 useless extension candidates. Maximal degree in co-relation 9368. Up to 3650 conditions per place. [2023-11-29 05:15:35,835 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 67 selfloop transitions, 2 changer transitions 7/77 dead transitions. [2023-11-29 05:15:35,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 77 transitions, 339 flow [2023-11-29 05:15:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:15:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:15:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-11-29 05:15:35,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816993464052288 [2023-11-29 05:15:35,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-11-29 05:15:35,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-11-29 05:15:35,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:35,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-11-29 05:15:35,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:35,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:35,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:35,867 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 112 flow. Second operand 3 states and 89 transitions. [2023-11-29 05:15:35,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 77 transitions, 339 flow [2023-11-29 05:15:35,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 317 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:15:35,889 INFO L231 Difference]: Finished difference. Result has 42 places, 47 transitions, 110 flow [2023-11-29 05:15:35,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=47} [2023-11-29 05:15:35,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-11-29 05:15:35,896 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 47 transitions, 110 flow [2023-11-29 05:15:35,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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) [2023-11-29 05:15:35,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:35,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:35,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:15:35,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:35,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash -866106014, now seen corresponding path program 1 times [2023-11-29 05:15:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681704467] [2023-11-29 05:15:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:36,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681704467] [2023-11-29 05:15:36,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681704467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:36,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:36,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:15:36,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021161964] [2023-11-29 05:15:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:36,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:15:36,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:15:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:15:36,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:36,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:36,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:36,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:36,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:37,582 INFO L124 PetriNetUnfolderBase]: 3678/5007 cut-off events. [2023-11-29 05:15:37,583 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-11-29 05:15:37,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10711 conditions, 5007 events. 3678/5007 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22088 event pairs, 377 based on Foata normal form. 1/3951 useless extension candidates. Maximal degree in co-relation 8785. Up to 3196 conditions per place. [2023-11-29 05:15:37,627 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 92 selfloop transitions, 2 changer transitions 16/111 dead transitions. [2023-11-29 05:15:37,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 111 transitions, 485 flow [2023-11-29 05:15:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-29 05:15:37,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-11-29 05:15:37,632 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-29 05:15:37,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-29 05:15:37,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:37,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-29 05:15:37,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 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) [2023-11-29 05:15:37,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:37,636 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:37,636 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 110 flow. Second operand 5 states and 128 transitions. [2023-11-29 05:15:37,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 111 transitions, 485 flow [2023-11-29 05:15:37,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 111 transitions, 475 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 05:15:37,681 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 121 flow [2023-11-29 05:15:37,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-29 05:15:37,682 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-29 05:15:37,682 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 121 flow [2023-11-29 05:15:37,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:37,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:37,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:15:37,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:37,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 885184660, now seen corresponding path program 2 times [2023-11-29 05:15:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408547981] [2023-11-29 05:15:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:37,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:38,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:38,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408547981] [2023-11-29 05:15:38,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408547981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:38,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:38,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:15:38,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867536414] [2023-11-29 05:15:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:38,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:15:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:15:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:15:38,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:38,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:38,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:38,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:39,293 INFO L124 PetriNetUnfolderBase]: 4422/6131 cut-off events. [2023-11-29 05:15:39,294 INFO L125 PetriNetUnfolderBase]: For 1384/1384 co-relation queries the response was YES. [2023-11-29 05:15:39,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13516 conditions, 6131 events. 4422/6131 cut-off events. For 1384/1384 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27174 event pairs, 2137 based on Foata normal form. 1/5259 useless extension candidates. Maximal degree in co-relation 13493. Up to 3957 conditions per place. [2023-11-29 05:15:39,347 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 88 selfloop transitions, 3 changer transitions 17/109 dead transitions. [2023-11-29 05:15:39,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 109 transitions, 499 flow [2023-11-29 05:15:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-29 05:15:39,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48627450980392156 [2023-11-29 05:15:39,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-29 05:15:39,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-29 05:15:39,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:39,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-29 05:15:39,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 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) [2023-11-29 05:15:39,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:39,353 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:39,353 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 121 flow. Second operand 5 states and 124 transitions. [2023-11-29 05:15:39,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 109 transitions, 499 flow [2023-11-29 05:15:39,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 109 transitions, 490 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:15:39,362 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 138 flow [2023-11-29 05:15:39,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-11-29 05:15:39,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-11-29 05:15:39,363 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 138 flow [2023-11-29 05:15:39,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:39,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:39,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:15:39,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:39,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2071982540, now seen corresponding path program 3 times [2023-11-29 05:15:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:39,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915577160] [2023-11-29 05:15:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:39,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:39,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915577160] [2023-11-29 05:15:39,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915577160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:39,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:39,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:15:39,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987884980] [2023-11-29 05:15:39,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:39,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:15:39,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:15:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:15:39,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:39,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:39,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:39,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:39,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:40,777 INFO L124 PetriNetUnfolderBase]: 4878/6790 cut-off events. [2023-11-29 05:15:40,778 INFO L125 PetriNetUnfolderBase]: For 2644/2644 co-relation queries the response was YES. [2023-11-29 05:15:40,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15488 conditions, 6790 events. 4878/6790 cut-off events. For 2644/2644 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32876 event pairs, 697 based on Foata normal form. 1/5834 useless extension candidates. Maximal degree in co-relation 15459. Up to 4690 conditions per place. [2023-11-29 05:15:40,826 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 90 selfloop transitions, 3 changer transitions 17/111 dead transitions. [2023-11-29 05:15:40,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 111 transitions, 521 flow [2023-11-29 05:15:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2023-11-29 05:15:40,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2023-11-29 05:15:40,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 126 transitions. [2023-11-29 05:15:40,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 126 transitions. [2023-11-29 05:15:40,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:40,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 126 transitions. [2023-11-29 05:15:40,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:40,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:40,832 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:40,833 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 138 flow. Second operand 5 states and 126 transitions. [2023-11-29 05:15:40,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 111 transitions, 521 flow [2023-11-29 05:15:40,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 111 transitions, 510 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 05:15:40,856 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 153 flow [2023-11-29 05:15:40,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-11-29 05:15:40,858 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-11-29 05:15:40,858 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 153 flow [2023-11-29 05:15:40,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:40,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:40,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:15:40,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:40,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1339345260, now seen corresponding path program 4 times [2023-11-29 05:15:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133440906] [2023-11-29 05:15:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:41,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:41,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133440906] [2023-11-29 05:15:41,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133440906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:41,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:41,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:15:41,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812460072] [2023-11-29 05:15:41,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:41,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:15:41,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:15:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:15:41,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:41,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:41,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:41,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:41,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:42,429 INFO L124 PetriNetUnfolderBase]: 5532/7766 cut-off events. [2023-11-29 05:15:42,430 INFO L125 PetriNetUnfolderBase]: For 4862/4862 co-relation queries the response was YES. [2023-11-29 05:15:42,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 7766 events. 5532/7766 cut-off events. For 4862/4862 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36306 event pairs, 3117 based on Foata normal form. 1/6702 useless extension candidates. Maximal degree in co-relation 18055. Up to 5619 conditions per place. [2023-11-29 05:15:42,467 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 87 selfloop transitions, 4 changer transitions 18/110 dead transitions. [2023-11-29 05:15:42,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 548 flow [2023-11-29 05:15:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2023-11-29 05:15:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47843137254901963 [2023-11-29 05:15:42,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 122 transitions. [2023-11-29 05:15:42,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 122 transitions. [2023-11-29 05:15:42,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:42,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 122 transitions. [2023-11-29 05:15:42,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:42,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:42,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:42,474 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 153 flow. Second operand 5 states and 122 transitions. [2023-11-29 05:15:42,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 548 flow [2023-11-29 05:15:42,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 110 transitions, 532 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 05:15:42,492 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 178 flow [2023-11-29 05:15:42,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-11-29 05:15:42,493 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-11-29 05:15:42,493 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 178 flow [2023-11-29 05:15:42,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:42,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:42,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:42,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:15:42,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:42,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash 854561616, now seen corresponding path program 5 times [2023-11-29 05:15:42,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:42,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752991365] [2023-11-29 05:15:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752991365] [2023-11-29 05:15:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752991365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:43,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:43,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:15:43,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219146696] [2023-11-29 05:15:43,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:43,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:15:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:15:43,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:15:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:43,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:43,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:43,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:43,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:44,131 INFO L124 PetriNetUnfolderBase]: 5410/7565 cut-off events. [2023-11-29 05:15:44,131 INFO L125 PetriNetUnfolderBase]: For 6192/6192 co-relation queries the response was YES. [2023-11-29 05:15:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 7565 events. 5410/7565 cut-off events. For 6192/6192 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35447 event pairs, 2907 based on Foata normal form. 1/6509 useless extension candidates. Maximal degree in co-relation 17949. Up to 5409 conditions per place. [2023-11-29 05:15:44,172 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 97 selfloop transitions, 4 changer transitions 16/118 dead transitions. [2023-11-29 05:15:44,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 118 transitions, 585 flow [2023-11-29 05:15:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2023-11-29 05:15:44,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137254901960784 [2023-11-29 05:15:44,174 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 131 transitions. [2023-11-29 05:15:44,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 131 transitions. [2023-11-29 05:15:44,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:44,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 131 transitions. [2023-11-29 05:15:44,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.2) internal successors, (131), 5 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) [2023-11-29 05:15:44,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:44,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:44,176 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 178 flow. Second operand 5 states and 131 transitions. [2023-11-29 05:15:44,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 118 transitions, 585 flow [2023-11-29 05:15:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 569 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 05:15:44,206 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 177 flow [2023-11-29 05:15:44,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-11-29 05:15:44,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2023-11-29 05:15:44,207 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 177 flow [2023-11-29 05:15:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:44,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:44,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:44,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:15:44,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:44,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1322848554, now seen corresponding path program 6 times [2023-11-29 05:15:44,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:44,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879220355] [2023-11-29 05:15:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:44,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879220355] [2023-11-29 05:15:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879220355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:44,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:44,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:15:44,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581314811] [2023-11-29 05:15:44,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:15:44,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:44,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:15:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:15:44,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:44,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:44,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:44,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:44,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:45,773 INFO L124 PetriNetUnfolderBase]: 5293/7388 cut-off events. [2023-11-29 05:15:45,774 INFO L125 PetriNetUnfolderBase]: For 6122/6122 co-relation queries the response was YES. [2023-11-29 05:15:45,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17519 conditions, 7388 events. 5293/7388 cut-off events. For 6122/6122 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33720 event pairs, 3017 based on Foata normal form. 1/6337 useless extension candidates. Maximal degree in co-relation 17487. Up to 5620 conditions per place. [2023-11-29 05:15:45,811 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 10 changer transitions 16/120 dead transitions. [2023-11-29 05:15:45,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 590 flow [2023-11-29 05:15:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:15:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:15:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2023-11-29 05:15:45,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2023-11-29 05:15:45,813 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 137 transitions. [2023-11-29 05:15:45,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 137 transitions. [2023-11-29 05:15:45,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:45,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 137 transitions. [2023-11-29 05:15:45,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:45,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:45,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:45,817 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 177 flow. Second operand 6 states and 137 transitions. [2023-11-29 05:15:45,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 590 flow [2023-11-29 05:15:45,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 120 transitions, 579 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 05:15:45,855 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 231 flow [2023-11-29 05:15:45,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-11-29 05:15:45,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2023-11-29 05:15:45,856 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 231 flow [2023-11-29 05:15:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:45,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:45,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:45,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:15:45,857 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:45,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash -165211097, now seen corresponding path program 1 times [2023-11-29 05:15:45,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:45,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920072866] [2023-11-29 05:15:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:45,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920072866] [2023-11-29 05:15:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920072866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:45,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:45,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506330900] [2023-11-29 05:15:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:45,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:45,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:45,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:46,775 INFO L124 PetriNetUnfolderBase]: 6349/8881 cut-off events. [2023-11-29 05:15:46,775 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-11-29 05:15:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 8881 events. 6349/8881 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 43471 event pairs, 497 based on Foata normal form. 72/7651 useless extension candidates. Maximal degree in co-relation 20931. Up to 5624 conditions per place. [2023-11-29 05:15:46,814 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 98 selfloop transitions, 6 changer transitions 0/105 dead transitions. [2023-11-29 05:15:46,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 581 flow [2023-11-29 05:15:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2023-11-29 05:15:46,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343137254901961 [2023-11-29 05:15:46,816 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 109 transitions. [2023-11-29 05:15:46,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 109 transitions. [2023-11-29 05:15:46,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:46,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 109 transitions. [2023-11-29 05:15:46,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:46,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:46,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:46,818 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 231 flow. Second operand 4 states and 109 transitions. [2023-11-29 05:15:46,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 581 flow [2023-11-29 05:15:46,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 574 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:15:46,847 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 285 flow [2023-11-29 05:15:46,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-11-29 05:15:46,848 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2023-11-29 05:15:46,848 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 285 flow [2023-11-29 05:15:46,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:46,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:46,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:46,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:15:46,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:46,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash 816109431, now seen corresponding path program 2 times [2023-11-29 05:15:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:46,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721203373] [2023-11-29 05:15:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:46,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:46,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721203373] [2023-11-29 05:15:46,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721203373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:46,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:46,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591520631] [2023-11-29 05:15:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:46,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:46,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:46,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:46,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:47,879 INFO L124 PetriNetUnfolderBase]: 5957/8342 cut-off events. [2023-11-29 05:15:47,879 INFO L125 PetriNetUnfolderBase]: For 7791/7791 co-relation queries the response was YES. [2023-11-29 05:15:47,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20421 conditions, 8342 events. 5957/8342 cut-off events. For 7791/7791 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 40089 event pairs, 667 based on Foata normal form. 72/7188 useless extension candidates. Maximal degree in co-relation 20361. Up to 5112 conditions per place. [2023-11-29 05:15:47,931 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 105 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2023-11-29 05:15:47,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 114 transitions, 694 flow [2023-11-29 05:15:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-29 05:15:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-29 05:15:47,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-29 05:15:47,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-29 05:15:47,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:47,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-29 05:15:47,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:47,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:47,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:47,937 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 285 flow. Second operand 4 states and 111 transitions. [2023-11-29 05:15:47,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 114 transitions, 694 flow [2023-11-29 05:15:47,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 114 transitions, 694 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:15:47,960 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 370 flow [2023-11-29 05:15:47,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-11-29 05:15:47,962 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2023-11-29 05:15:47,962 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 370 flow [2023-11-29 05:15:47,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:47,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:47,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:47,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:15:47,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:47,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:47,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1040015151, now seen corresponding path program 3 times [2023-11-29 05:15:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:47,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488107000] [2023-11-29 05:15:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:47,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:48,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:48,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488107000] [2023-11-29 05:15:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488107000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:48,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:48,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942124737] [2023-11-29 05:15:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:48,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:48,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:48,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:48,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:48,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:48,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:49,074 INFO L124 PetriNetUnfolderBase]: 5609/7847 cut-off events. [2023-11-29 05:15:49,075 INFO L125 PetriNetUnfolderBase]: For 9496/9496 co-relation queries the response was YES. [2023-11-29 05:15:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20199 conditions, 7847 events. 5609/7847 cut-off events. For 9496/9496 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37438 event pairs, 1367 based on Foata normal form. 28/6725 useless extension candidates. Maximal degree in co-relation 20136. Up to 5462 conditions per place. [2023-11-29 05:15:49,115 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 103 selfloop transitions, 11 changer transitions 2/117 dead transitions. [2023-11-29 05:15:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 117 transitions, 739 flow [2023-11-29 05:15:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2023-11-29 05:15:49,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2023-11-29 05:15:49,117 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 121 transitions. [2023-11-29 05:15:49,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 121 transitions. [2023-11-29 05:15:49,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:49,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 121 transitions. [2023-11-29 05:15:49,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:49,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:49,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:49,119 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 370 flow. Second operand 5 states and 121 transitions. [2023-11-29 05:15:49,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 117 transitions, 739 flow [2023-11-29 05:15:49,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 737 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 05:15:49,149 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 399 flow [2023-11-29 05:15:49,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-11-29 05:15:49,150 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2023-11-29 05:15:49,150 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 399 flow [2023-11-29 05:15:49,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:49,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:49,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:49,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:15:49,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:49,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1088265837, now seen corresponding path program 1 times [2023-11-29 05:15:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:49,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197580842] [2023-11-29 05:15:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197580842] [2023-11-29 05:15:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197580842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:49,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:49,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724850203] [2023-11-29 05:15:49,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:49,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:49,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:49,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:49,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:49,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:49,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:49,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:50,155 INFO L124 PetriNetUnfolderBase]: 6541/9169 cut-off events. [2023-11-29 05:15:50,156 INFO L125 PetriNetUnfolderBase]: For 12568/12568 co-relation queries the response was YES. [2023-11-29 05:15:50,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23215 conditions, 9169 events. 6541/9169 cut-off events. For 12568/12568 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 45339 event pairs, 1037 based on Foata normal form. 70/7861 useless extension candidates. Maximal degree in co-relation 23150. Up to 6330 conditions per place. [2023-11-29 05:15:50,214 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 101 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2023-11-29 05:15:50,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 749 flow [2023-11-29 05:15:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2023-11-29 05:15:50,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2023-11-29 05:15:50,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 108 transitions. [2023-11-29 05:15:50,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 108 transitions. [2023-11-29 05:15:50,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:50,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 108 transitions. [2023-11-29 05:15:50,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:50,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:50,217 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:50,218 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 399 flow. Second operand 4 states and 108 transitions. [2023-11-29 05:15:50,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 749 flow [2023-11-29 05:15:50,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 714 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-29 05:15:50,264 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 426 flow [2023-11-29 05:15:50,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-11-29 05:15:50,265 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2023-11-29 05:15:50,265 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 426 flow [2023-11-29 05:15:50,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:50,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:50,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:50,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:15:50,265 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:50,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 321556657, now seen corresponding path program 2 times [2023-11-29 05:15:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:50,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84861246] [2023-11-29 05:15:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:50,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:50,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84861246] [2023-11-29 05:15:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84861246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:50,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:50,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:50,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621230121] [2023-11-29 05:15:50,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:50,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:50,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:50,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:50,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:50,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:50,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:51,364 INFO L124 PetriNetUnfolderBase]: 6181/8656 cut-off events. [2023-11-29 05:15:51,364 INFO L125 PetriNetUnfolderBase]: For 10066/10066 co-relation queries the response was YES. [2023-11-29 05:15:51,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22498 conditions, 8656 events. 6181/8656 cut-off events. For 10066/10066 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42003 event pairs, 1673 based on Foata normal form. 30/7388 useless extension candidates. Maximal degree in co-relation 22435. Up to 6156 conditions per place. [2023-11-29 05:15:51,408 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 109 selfloop transitions, 11 changer transitions 3/124 dead transitions. [2023-11-29 05:15:51,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 820 flow [2023-11-29 05:15:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-29 05:15:51,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48627450980392156 [2023-11-29 05:15:51,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-29 05:15:51,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-29 05:15:51,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:51,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-29 05:15:51,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 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) [2023-11-29 05:15:51,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:51,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:51,412 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 426 flow. Second operand 5 states and 124 transitions. [2023-11-29 05:15:51,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 820 flow [2023-11-29 05:15:51,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 802 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 05:15:51,440 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 461 flow [2023-11-29 05:15:51,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=461, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-11-29 05:15:51,441 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2023-11-29 05:15:51,441 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 461 flow [2023-11-29 05:15:51,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:51,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:51,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:15:51,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:51,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:51,442 INFO L85 PathProgramCache]: Analyzing trace with hash 832028867, now seen corresponding path program 3 times [2023-11-29 05:15:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:51,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290921338] [2023-11-29 05:15:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:51,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:51,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290921338] [2023-11-29 05:15:51,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290921338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:51,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:51,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:51,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317134398] [2023-11-29 05:15:51,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:51,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:51,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:51,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:51,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:51,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:51,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:52,515 INFO L124 PetriNetUnfolderBase]: 5473/7648 cut-off events. [2023-11-29 05:15:52,515 INFO L125 PetriNetUnfolderBase]: For 11872/11872 co-relation queries the response was YES. [2023-11-29 05:15:52,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20151 conditions, 7648 events. 5473/7648 cut-off events. For 11872/11872 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35888 event pairs, 2501 based on Foata normal form. 58/6564 useless extension candidates. Maximal degree in co-relation 20087. Up to 5101 conditions per place. [2023-11-29 05:15:52,563 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 124 selfloop transitions, 7 changer transitions 6/138 dead transitions. [2023-11-29 05:15:52,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 138 transitions, 885 flow [2023-11-29 05:15:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:15:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:15:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2023-11-29 05:15:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254901960784314 [2023-11-29 05:15:52,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 134 transitions. [2023-11-29 05:15:52,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 134 transitions. [2023-11-29 05:15:52,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:52,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 134 transitions. [2023-11-29 05:15:52,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:52,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:52,568 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:52,568 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 461 flow. Second operand 5 states and 134 transitions. [2023-11-29 05:15:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 138 transitions, 885 flow [2023-11-29 05:15:52,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 138 transitions, 871 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 05:15:52,608 INFO L231 Difference]: Finished difference. Result has 86 places, 71 transitions, 430 flow [2023-11-29 05:15:52,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2023-11-29 05:15:52,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2023-11-29 05:15:52,609 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 430 flow [2023-11-29 05:15:52,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:52,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:52,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:15:52,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:52,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 300191985, now seen corresponding path program 4 times [2023-11-29 05:15:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061574973] [2023-11-29 05:15:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:52,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:52,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061574973] [2023-11-29 05:15:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061574973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:52,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:52,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:52,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975037706] [2023-11-29 05:15:52,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:52,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:52,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:52,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:52,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:52,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:52,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:53,658 INFO L124 PetriNetUnfolderBase]: 4835/6717 cut-off events. [2023-11-29 05:15:53,658 INFO L125 PetriNetUnfolderBase]: For 11095/11095 co-relation queries the response was YES. [2023-11-29 05:15:53,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17545 conditions, 6717 events. 4835/6717 cut-off events. For 11095/11095 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 30115 event pairs, 1157 based on Foata normal form. 70/5745 useless extension candidates. Maximal degree in co-relation 17480. Up to 5306 conditions per place. [2023-11-29 05:15:53,745 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 95 selfloop transitions, 10 changer transitions 3/109 dead transitions. [2023-11-29 05:15:53,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 738 flow [2023-11-29 05:15:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2023-11-29 05:15:53,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2023-11-29 05:15:53,747 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 105 transitions. [2023-11-29 05:15:53,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 105 transitions. [2023-11-29 05:15:53,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:53,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 105 transitions. [2023-11-29 05:15:53,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:53,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:53,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:53,748 INFO L175 Difference]: Start difference. First operand has 86 places, 71 transitions, 430 flow. Second operand 4 states and 105 transitions. [2023-11-29 05:15:53,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 738 flow [2023-11-29 05:15:53,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 712 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-29 05:15:53,770 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 408 flow [2023-11-29 05:15:53,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=408, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-11-29 05:15:53,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2023-11-29 05:15:53,771 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 408 flow [2023-11-29 05:15:53,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:53,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:53,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:53,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:15:53,772 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 368026323, now seen corresponding path program 5 times [2023-11-29 05:15:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041766899] [2023-11-29 05:15:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041766899] [2023-11-29 05:15:53,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041766899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:53,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:53,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:53,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863449780] [2023-11-29 05:15:53,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:53,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:53,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:53,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 408 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:53,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:53,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:53,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:54,561 INFO L124 PetriNetUnfolderBase]: 4733/6571 cut-off events. [2023-11-29 05:15:54,562 INFO L125 PetriNetUnfolderBase]: For 7164/7164 co-relation queries the response was YES. [2023-11-29 05:15:54,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16929 conditions, 6571 events. 4733/6571 cut-off events. For 7164/7164 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29538 event pairs, 2841 based on Foata normal form. 20/5545 useless extension candidates. Maximal degree in co-relation 16866. Up to 5763 conditions per place. [2023-11-29 05:15:54,607 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 88 selfloop transitions, 1 changer transitions 14/104 dead transitions. [2023-11-29 05:15:54,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 692 flow [2023-11-29 05:15:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2023-11-29 05:15:54,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2023-11-29 05:15:54,608 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2023-11-29 05:15:54,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2023-11-29 05:15:54,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:54,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2023-11-29 05:15:54,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:54,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:54,610 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:54,610 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 408 flow. Second operand 4 states and 97 transitions. [2023-11-29 05:15:54,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 692 flow [2023-11-29 05:15:54,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 664 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 05:15:54,635 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 366 flow [2023-11-29 05:15:54,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=366, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-11-29 05:15:54,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2023-11-29 05:15:54,636 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 366 flow [2023-11-29 05:15:54,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:54,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:54,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:15:54,636 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:54,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -624760457, now seen corresponding path program 4 times [2023-11-29 05:15:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:54,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540872534] [2023-11-29 05:15:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:54,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:54,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540872534] [2023-11-29 05:15:54,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540872534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:54,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:54,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:54,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24176160] [2023-11-29 05:15:54,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:54,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:54,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:54,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:54,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:54,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:54,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:54,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:54,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:55,389 INFO L124 PetriNetUnfolderBase]: 4339/6000 cut-off events. [2023-11-29 05:15:55,389 INFO L125 PetriNetUnfolderBase]: For 5027/5027 co-relation queries the response was YES. [2023-11-29 05:15:55,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 6000 events. 4339/6000 cut-off events. For 5027/5027 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26184 event pairs, 937 based on Foata normal form. 40/5074 useless extension candidates. Maximal degree in co-relation 15185. Up to 5386 conditions per place. [2023-11-29 05:15:55,420 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 75 selfloop transitions, 5 changer transitions 16/97 dead transitions. [2023-11-29 05:15:55,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 608 flow [2023-11-29 05:15:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-29 05:15:55,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2023-11-29 05:15:55,422 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-29 05:15:55,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-29 05:15:55,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:55,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-29 05:15:55,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:55,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:55,424 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:55,424 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 366 flow. Second operand 4 states and 95 transitions. [2023-11-29 05:15:55,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 608 flow [2023-11-29 05:15:55,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 97 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:15:55,443 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 336 flow [2023-11-29 05:15:55,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-29 05:15:55,444 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2023-11-29 05:15:55,445 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 336 flow [2023-11-29 05:15:55,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:55,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:55,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:55,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:15:55,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:55,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 320689617, now seen corresponding path program 5 times [2023-11-29 05:15:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:55,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51088115] [2023-11-29 05:15:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:55,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51088115] [2023-11-29 05:15:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51088115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:55,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:15:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795690588] [2023-11-29 05:15:55,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:55,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:15:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:15:55,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:15:55,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:55,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:55,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:55,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:55,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:56,226 INFO L124 PetriNetUnfolderBase]: 3823/5257 cut-off events. [2023-11-29 05:15:56,227 INFO L125 PetriNetUnfolderBase]: For 4326/4326 co-relation queries the response was YES. [2023-11-29 05:15:56,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13373 conditions, 5257 events. 3823/5257 cut-off events. For 4326/4326 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22088 event pairs, 2431 based on Foata normal form. 20/4419 useless extension candidates. Maximal degree in co-relation 13356. Up to 5101 conditions per place. [2023-11-29 05:15:56,259 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 61 selfloop transitions, 0 changer transitions 15/77 dead transitions. [2023-11-29 05:15:56,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 495 flow [2023-11-29 05:15:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:15:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:15:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2023-11-29 05:15:56,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-11-29 05:15:56,260 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 75 transitions. [2023-11-29 05:15:56,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 75 transitions. [2023-11-29 05:15:56,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:56,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 75 transitions. [2023-11-29 05:15:56,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:56,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:56,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 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) [2023-11-29 05:15:56,262 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 336 flow. Second operand 4 states and 75 transitions. [2023-11-29 05:15:56,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 495 flow [2023-11-29 05:15:56,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 479 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 05:15:56,269 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 281 flow [2023-11-29 05:15:56,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-11-29 05:15:56,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2023-11-29 05:15:56,271 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 281 flow [2023-11-29 05:15:56,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2023-11-29 05:15:56,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:56,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:56,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:15:56,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:56,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash 760034802, now seen corresponding path program 1 times [2023-11-29 05:15:56,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:56,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208156030] [2023-11-29 05:15:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208156030] [2023-11-29 05:15:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208156030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:15:56,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:15:56,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:15:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222378380] [2023-11-29 05:15:56,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:15:56,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:15:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:15:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:15:56,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:15:56,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 281 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2023-11-29 05:15:56,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:15:56,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:15:56,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:15:58,395 INFO L124 PetriNetUnfolderBase]: 9217/12684 cut-off events. [2023-11-29 05:15:58,396 INFO L125 PetriNetUnfolderBase]: For 5739/5739 co-relation queries the response was YES. [2023-11-29 05:15:58,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31830 conditions, 12684 events. 9217/12684 cut-off events. For 5739/5739 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 62363 event pairs, 1930 based on Foata normal form. 1/10738 useless extension candidates. Maximal degree in co-relation 31817. Up to 3667 conditions per place. [2023-11-29 05:15:58,480 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 182 selfloop transitions, 16 changer transitions 1/200 dead transitions. [2023-11-29 05:15:58,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 200 transitions, 1238 flow [2023-11-29 05:15:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:15:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:15:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2023-11-29 05:15:58,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226579520697168 [2023-11-29 05:15:58,482 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 194 transitions. [2023-11-29 05:15:58,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 194 transitions. [2023-11-29 05:15:58,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:15:58,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 194 transitions. [2023-11-29 05:15:58,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:58,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:58,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:58,486 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 281 flow. Second operand 9 states and 194 transitions. [2023-11-29 05:15:58,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 200 transitions, 1238 flow [2023-11-29 05:15:58,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 200 transitions, 1210 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-29 05:15:58,510 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 370 flow [2023-11-29 05:15:58,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2023-11-29 05:15:58,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2023-11-29 05:15:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 370 flow [2023-11-29 05:15:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2023-11-29 05:15:58,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:15:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:15:58,512 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:15:58,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1526687793, now seen corresponding path program 1 times [2023-11-29 05:15:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349961176] [2023-11-29 05:15:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:58,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:58,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349961176] [2023-11-29 05:15:58,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349961176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:15:58,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543702392] [2023-11-29 05:15:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:58,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:15:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:15:58,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:15:58,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:15:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:58,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:15:58,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:15:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:59,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:16:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:16:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543702392] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:00,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:16:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 11] total 24 [2023-11-29 05:16:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710379012] [2023-11-29 05:16:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:16:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:16:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:16:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:16:00,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:16:00,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 370 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:00,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:16:00,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:16:00,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:16:05,831 INFO L124 PetriNetUnfolderBase]: 22904/32150 cut-off events. [2023-11-29 05:16:05,831 INFO L125 PetriNetUnfolderBase]: For 18929/18929 co-relation queries the response was YES. [2023-11-29 05:16:06,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88395 conditions, 32150 events. 22904/32150 cut-off events. For 18929/18929 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 190291 event pairs, 2552 based on Foata normal form. 1/29282 useless extension candidates. Maximal degree in co-relation 88378. Up to 7825 conditions per place. [2023-11-29 05:16:06,151 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 383 selfloop transitions, 111 changer transitions 11/506 dead transitions. [2023-11-29 05:16:06,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 506 transitions, 3236 flow [2023-11-29 05:16:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:16:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:16:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 415 transitions. [2023-11-29 05:16:06,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45206971677559915 [2023-11-29 05:16:06,155 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 415 transitions. [2023-11-29 05:16:06,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 415 transitions. [2023-11-29 05:16:06,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:16:06,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 415 transitions. [2023-11-29 05:16:06,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:06,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 51.0) internal successors, (969), 19 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:06,161 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 51.0) internal successors, (969), 19 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:06,161 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 370 flow. Second operand 18 states and 415 transitions. [2023-11-29 05:16:06,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 506 transitions, 3236 flow [2023-11-29 05:16:06,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 506 transitions, 3226 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-29 05:16:06,247 INFO L231 Difference]: Finished difference. Result has 109 places, 206 transitions, 1435 flow [2023-11-29 05:16:06,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1435, PETRI_PLACES=109, PETRI_TRANSITIONS=206} [2023-11-29 05:16:06,248 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2023-11-29 05:16:06,248 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 206 transitions, 1435 flow [2023-11-29 05:16:06,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:06,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:16:06,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:16:06,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:16:06,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:06,449 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:16:06,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:16:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1238495788, now seen corresponding path program 1 times [2023-11-29 05:16:06,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:16:06,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418103697] [2023-11-29 05:16:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:16:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:16:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:16:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:16:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418103697] [2023-11-29 05:16:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418103697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110421895] [2023-11-29 05:16:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:06,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:16:06,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:16:06,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:16:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:16:06,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:16:06,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:16:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:16:07,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:16:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:16:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110421895] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:10,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:16:10,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 12] total 25 [2023-11-29 05:16:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334256913] [2023-11-29 05:16:10,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:16:10,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:16:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:10,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:16:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:16:10,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:16:10,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 206 transitions, 1435 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:10,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:16:10,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:16:10,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:16:22,640 INFO L124 PetriNetUnfolderBase]: 43405/60689 cut-off events. [2023-11-29 05:16:22,641 INFO L125 PetriNetUnfolderBase]: For 121226/121226 co-relation queries the response was YES. [2023-11-29 05:16:22,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205607 conditions, 60689 events. 43405/60689 cut-off events. For 121226/121226 co-relation queries the response was YES. Maximal size of possible extension queue 2227. Compared 388095 event pairs, 3651 based on Foata normal form. 2/55018 useless extension candidates. Maximal degree in co-relation 205576. Up to 20506 conditions per place. [2023-11-29 05:16:23,290 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 477 selfloop transitions, 334 changer transitions 19/831 dead transitions. [2023-11-29 05:16:23,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 831 transitions, 7016 flow [2023-11-29 05:16:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:16:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:16:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 465 transitions. [2023-11-29 05:16:23,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2023-11-29 05:16:23,293 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 465 transitions. [2023-11-29 05:16:23,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 465 transitions. [2023-11-29 05:16:23,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:16:23,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 465 transitions. [2023-11-29 05:16:23,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 23.25) internal successors, (465), 20 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:23,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 51.0) internal successors, (1071), 21 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:23,300 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 51.0) internal successors, (1071), 21 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:23,300 INFO L175 Difference]: Start difference. First operand has 109 places, 206 transitions, 1435 flow. Second operand 20 states and 465 transitions. [2023-11-29 05:16:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 831 transitions, 7016 flow [2023-11-29 05:16:24,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 831 transitions, 6917 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-29 05:16:24,743 INFO L231 Difference]: Finished difference. Result has 140 places, 451 transitions, 4521 flow [2023-11-29 05:16:24,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4521, PETRI_PLACES=140, PETRI_TRANSITIONS=451} [2023-11-29 05:16:24,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2023-11-29 05:16:24,743 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 451 transitions, 4521 flow [2023-11-29 05:16:24,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:24,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:16:24,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:16:24,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:16:24,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:24,944 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:16:24,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:16:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash -653349907, now seen corresponding path program 2 times [2023-11-29 05:16:24,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:16:24,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463134922] [2023-11-29 05:16:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:16:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:16:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:16:25,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:16:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463134922] [2023-11-29 05:16:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463134922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27312377] [2023-11-29 05:16:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:16:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:16:25,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:16:25,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:16:25,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:16:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:16:25,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:16:25,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:16:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:16:25,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:16:25,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27312377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:16:25,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:16:25,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 17 [2023-11-29 05:16:25,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187041371] [2023-11-29 05:16:25,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:16:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:16:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:16:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:16:25,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:16:25,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 451 transitions, 4521 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:16:25,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:16:25,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:16:25,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:16:39,589 INFO L124 PetriNetUnfolderBase]: 62109/85799 cut-off events. [2023-11-29 05:16:39,589 INFO L125 PetriNetUnfolderBase]: For 350714/350714 co-relation queries the response was YES. [2023-11-29 05:16:40,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333382 conditions, 85799 events. 62109/85799 cut-off events. For 350714/350714 co-relation queries the response was YES. Maximal size of possible extension queue 3085. Compared 559135 event pairs, 7852 based on Foata normal form. 1/77312 useless extension candidates. Maximal degree in co-relation 333337. Up to 36145 conditions per place. [2023-11-29 05:16:40,683 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 621 selfloop transitions, 450 changer transitions 2/1074 dead transitions. [2023-11-29 05:16:40,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1074 transitions, 11953 flow [2023-11-29 05:16:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:16:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:16:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 362 transitions. [2023-11-29 05:16:40,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44362745098039214 [2023-11-29 05:16:40,685 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 362 transitions. [2023-11-29 05:16:40,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 362 transitions. [2023-11-29 05:16:40,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:16:40,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 362 transitions. [2023-11-29 05:16:40,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 22.625) internal successors, (362), 16 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:40,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:40,690 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:40,690 INFO L175 Difference]: Start difference. First operand has 140 places, 451 transitions, 4521 flow. Second operand 16 states and 362 transitions. [2023-11-29 05:16:40,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1074 transitions, 11953 flow [2023-11-29 05:16:47,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1074 transitions, 11590 flow, removed 169 selfloop flow, removed 2 redundant places. [2023-11-29 05:16:47,475 INFO L231 Difference]: Finished difference. Result has 162 places, 725 transitions, 8704 flow [2023-11-29 05:16:47,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8704, PETRI_PLACES=162, PETRI_TRANSITIONS=725} [2023-11-29 05:16:47,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2023-11-29 05:16:47,476 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 725 transitions, 8704 flow [2023-11-29 05:16:47,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:16:47,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:16:47,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:16:47,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:16:47,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:47,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:16:47,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:16:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash -34626539, now seen corresponding path program 3 times [2023-11-29 05:16:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:16:47,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566037557] [2023-11-29 05:16:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:16:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:16:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:16:47,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:16:47,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566037557] [2023-11-29 05:16:47,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566037557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:47,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599588871] [2023-11-29 05:16:47,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:16:47,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:16:47,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:16:47,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:16:47,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:16:47,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:16:47,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:16:47,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:16:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:16:48,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:16:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599588871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:16:48,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:16:48,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 17 [2023-11-29 05:16:48,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486740495] [2023-11-29 05:16:48,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:16:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:16:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:16:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:16:48,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:16:48,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 725 transitions, 8704 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:16:48,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:16:48,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:16:48,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:17:04,759 INFO L124 PetriNetUnfolderBase]: 62417/86305 cut-off events. [2023-11-29 05:17:04,759 INFO L125 PetriNetUnfolderBase]: For 437590/437590 co-relation queries the response was YES. [2023-11-29 05:17:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363184 conditions, 86305 events. 62417/86305 cut-off events. For 437590/437590 co-relation queries the response was YES. Maximal size of possible extension queue 3084. Compared 562697 event pairs, 6688 based on Foata normal form. 1/77793 useless extension candidates. Maximal degree in co-relation 363130. Up to 36623 conditions per place. [2023-11-29 05:17:05,957 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 569 selfloop transitions, 527 changer transitions 4/1101 dead transitions. [2023-11-29 05:17:05,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1101 transitions, 13818 flow [2023-11-29 05:17:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:17:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:17:05,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 325 transitions. [2023-11-29 05:17:05,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42483660130718953 [2023-11-29 05:17:05,959 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 325 transitions. [2023-11-29 05:17:05,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 325 transitions. [2023-11-29 05:17:05,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:17:05,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 325 transitions. [2023-11-29 05:17:05,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:05,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 51.0) internal successors, (816), 16 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:05,962 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 51.0) internal successors, (816), 16 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:05,963 INFO L175 Difference]: Start difference. First operand has 162 places, 725 transitions, 8704 flow. Second operand 15 states and 325 transitions. [2023-11-29 05:17:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1101 transitions, 13818 flow [2023-11-29 05:17:17,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 1101 transitions, 13702 flow, removed 58 selfloop flow, removed 0 redundant places. [2023-11-29 05:17:17,201 INFO L231 Difference]: Finished difference. Result has 182 places, 803 transitions, 10985 flow [2023-11-29 05:17:17,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=8594, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10985, PETRI_PLACES=182, PETRI_TRANSITIONS=803} [2023-11-29 05:17:17,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2023-11-29 05:17:17,202 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 803 transitions, 10985 flow [2023-11-29 05:17:17,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:17:17,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:17:17,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:17:17,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:17:17,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:17,403 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:17:17,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:17:17,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1488971445, now seen corresponding path program 1 times [2023-11-29 05:17:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:17:17,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899201319] [2023-11-29 05:17:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:17:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:17:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:17:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:17:17,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:17:17,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899201319] [2023-11-29 05:17:17,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899201319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:17:17,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:17:17,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:17:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430832845] [2023-11-29 05:17:17,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:17:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:17:17,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:17:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:17:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:17:17,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:17:17,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 803 transitions, 10985 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2023-11-29 05:17:17,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:17:17,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:17:17,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:17:38,411 INFO L124 PetriNetUnfolderBase]: 71260/100362 cut-off events. [2023-11-29 05:17:38,411 INFO L125 PetriNetUnfolderBase]: For 616038/616038 co-relation queries the response was YES. [2023-11-29 05:17:39,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444337 conditions, 100362 events. 71260/100362 cut-off events. For 616038/616038 co-relation queries the response was YES. Maximal size of possible extension queue 3729. Compared 697267 event pairs, 32775 based on Foata normal form. 0/92092 useless extension candidates. Maximal degree in co-relation 444276. Up to 52843 conditions per place. [2023-11-29 05:17:40,156 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 1100 selfloop transitions, 88 changer transitions 80/1269 dead transitions. [2023-11-29 05:17:40,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 1269 transitions, 19292 flow [2023-11-29 05:17:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:17:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:17:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2023-11-29 05:17:40,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2023-11-29 05:17:40,158 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 132 transitions. [2023-11-29 05:17:40,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 132 transitions. [2023-11-29 05:17:40,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:17:40,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 132 transitions. [2023-11-29 05:17:40,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:40,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:40,159 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:40,159 INFO L175 Difference]: Start difference. First operand has 182 places, 803 transitions, 10985 flow. Second operand 6 states and 132 transitions. [2023-11-29 05:17:40,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 1269 transitions, 19292 flow [2023-11-29 05:17:53,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1269 transitions, 18321 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-11-29 05:17:53,674 INFO L231 Difference]: Finished difference. Result has 185 places, 778 transitions, 10333 flow [2023-11-29 05:17:53,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10333, PETRI_PLACES=185, PETRI_TRANSITIONS=778} [2023-11-29 05:17:53,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2023-11-29 05:17:53,675 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 778 transitions, 10333 flow [2023-11-29 05:17:53,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2023-11-29 05:17:53,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:17:53,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:17:53,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 05:17:53,675 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:17:53,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:17:53,675 INFO L85 PathProgramCache]: Analyzing trace with hash 145634975, now seen corresponding path program 4 times [2023-11-29 05:17:53,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:17:53,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915599708] [2023-11-29 05:17:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:17:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:17:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:17:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:17:53,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:17:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915599708] [2023-11-29 05:17:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915599708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:17:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093049839] [2023-11-29 05:17:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:17:53,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:53,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:17:53,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:17:53,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:17:53,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:17:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:17:53,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:17:53,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:17:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:17:54,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:17:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:17:54,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093049839] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:17:54,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:17:54,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 11] total 26 [2023-11-29 05:17:54,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423966495] [2023-11-29 05:17:54,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:17:54,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:17:54,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:17:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:17:54,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:17:54,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:17:54,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 778 transitions, 10333 flow. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:17:54,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:17:54,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:17:54,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:18:19,958 INFO L124 PetriNetUnfolderBase]: 86438/122478 cut-off events. [2023-11-29 05:18:19,958 INFO L125 PetriNetUnfolderBase]: For 762261/762261 co-relation queries the response was YES. [2023-11-29 05:18:21,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538541 conditions, 122478 events. 86438/122478 cut-off events. For 762261/762261 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 877070 event pairs, 11205 based on Foata normal form. 2/114592 useless extension candidates. Maximal degree in co-relation 538477. Up to 42840 conditions per place. [2023-11-29 05:18:21,529 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 808 selfloop transitions, 577 changer transitions 11/1397 dead transitions. [2023-11-29 05:18:21,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1397 transitions, 19090 flow [2023-11-29 05:18:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:18:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:18:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 507 transitions. [2023-11-29 05:18:21,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976470588235294 [2023-11-29 05:18:21,531 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 507 transitions. [2023-11-29 05:18:21,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 507 transitions. [2023-11-29 05:18:21,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:18:21,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 507 transitions. [2023-11-29 05:18:21,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 20.28) internal successors, (507), 25 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:18:21,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 51.0) internal successors, (1326), 26 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:18:21,534 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 51.0) internal successors, (1326), 26 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:18:21,534 INFO L175 Difference]: Start difference. First operand has 185 places, 778 transitions, 10333 flow. Second operand 25 states and 507 transitions. [2023-11-29 05:18:21,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1397 transitions, 19090 flow [2023-11-29 05:18:43,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1397 transitions, 19085 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:18:43,316 INFO L231 Difference]: Finished difference. Result has 221 places, 955 transitions, 14629 flow [2023-11-29 05:18:43,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=10328, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=14629, PETRI_PLACES=221, PETRI_TRANSITIONS=955} [2023-11-29 05:18:43,317 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2023-11-29 05:18:43,317 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 955 transitions, 14629 flow [2023-11-29 05:18:43,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:18:43,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:18:43,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:18:43,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:18:43,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:18:43,518 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:18:43,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:18:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1063086228, now seen corresponding path program 2 times [2023-11-29 05:18:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:18:43,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500737992] [2023-11-29 05:18:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:18:43,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:18:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:18:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:18:43,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:18:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500737992] [2023-11-29 05:18:43,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500737992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:18:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789006932] [2023-11-29 05:18:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:18:43,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:18:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:18:43,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:18:43,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:18:43,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:18:43,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:18:43,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:18:43,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:18:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:18:44,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:18:44,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789006932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:18:44,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:18:44,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 16 [2023-11-29 05:18:44,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309744266] [2023-11-29 05:18:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:18:44,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:18:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:18:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:18:44,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:18:44,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:18:44,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 955 transitions, 14629 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:18:44,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:18:44,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:18:44,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:19:21,441 INFO L124 PetriNetUnfolderBase]: 105878/150212 cut-off events. [2023-11-29 05:19:21,441 INFO L125 PetriNetUnfolderBase]: For 1233550/1233550 co-relation queries the response was YES. [2023-11-29 05:19:23,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728730 conditions, 150212 events. 105878/150212 cut-off events. For 1233550/1233550 co-relation queries the response was YES. Maximal size of possible extension queue 5402. Compared 1107540 event pairs, 18962 based on Foata normal form. 6/144114 useless extension candidates. Maximal degree in co-relation 728652. Up to 83706 conditions per place. [2023-11-29 05:19:24,085 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 1126 selfloop transitions, 606 changer transitions 34/1767 dead transitions. [2023-11-29 05:19:24,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1767 transitions, 28034 flow [2023-11-29 05:19:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:19:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:19:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 386 transitions. [2023-11-29 05:19:24,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44521337946943484 [2023-11-29 05:19:24,088 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 386 transitions. [2023-11-29 05:19:24,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 386 transitions. [2023-11-29 05:19:24,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:19:24,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 386 transitions. [2023-11-29 05:19:24,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:19:24,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 51.0) internal successors, (918), 18 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:19:24,091 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 51.0) internal successors, (918), 18 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:19:24,091 INFO L175 Difference]: Start difference. First operand has 221 places, 955 transitions, 14629 flow. Second operand 17 states and 386 transitions. [2023-11-29 05:19:24,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1767 transitions, 28034 flow [2023-11-29 05:20:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1767 transitions, 27910 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-11-29 05:20:31,019 INFO L231 Difference]: Finished difference. Result has 246 places, 1303 transitions, 22463 flow [2023-11-29 05:20:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=14529, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22463, PETRI_PLACES=246, PETRI_TRANSITIONS=1303} [2023-11-29 05:20:31,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2023-11-29 05:20:31,021 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 1303 transitions, 22463 flow [2023-11-29 05:20:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:20:31,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:31,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:31,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:20:31,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:20:31,221 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:20:31,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1370355082, now seen corresponding path program 3 times [2023-11-29 05:20:31,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:31,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257184809] [2023-11-29 05:20:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:31,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:31,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257184809] [2023-11-29 05:20:31,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257184809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:31,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565383286] [2023-11-29 05:20:31,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:20:31,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:31,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:31,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:20:31,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:20:31,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:31,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:20:31,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:32,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:20:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565383286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:32,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:20:32,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 16 [2023-11-29 05:20:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094907413] [2023-11-29 05:20:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:32,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:20:32,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:20:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:20:32,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:20:32,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 1303 transitions, 22463 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:20:32,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:32,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:20:32,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:21:12,015 INFO L124 PetriNetUnfolderBase]: 104734/148445 cut-off events. [2023-11-29 05:21:12,015 INFO L125 PetriNetUnfolderBase]: For 1407985/1407985 co-relation queries the response was YES. [2023-11-29 05:21:14,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758942 conditions, 148445 events. 104734/148445 cut-off events. For 1407985/1407985 co-relation queries the response was YES. Maximal size of possible extension queue 5401. Compared 1092227 event pairs, 19900 based on Foata normal form. 1/142315 useless extension candidates. Maximal degree in co-relation 758853. Up to 102679 conditions per place. [2023-11-29 05:21:14,766 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 1075 selfloop transitions, 621 changer transitions 34/1731 dead transitions. [2023-11-29 05:21:14,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1731 transitions, 30365 flow [2023-11-29 05:21:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:21:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:21:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 355 transitions. [2023-11-29 05:21:14,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867102396514161 [2023-11-29 05:21:14,768 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 355 transitions. [2023-11-29 05:21:14,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 355 transitions. [2023-11-29 05:21:14,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:21:14,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 355 transitions. [2023-11-29 05:21:14,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:14,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 51.0) internal successors, (969), 19 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:14,770 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 51.0) internal successors, (969), 19 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:14,771 INFO L175 Difference]: Start difference. First operand has 246 places, 1303 transitions, 22463 flow. Second operand 18 states and 355 transitions. [2023-11-29 05:21:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1731 transitions, 30365 flow [2023-11-29 05:22:40,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1731 transitions, 29723 flow, removed 316 selfloop flow, removed 2 redundant places. [2023-11-29 05:22:40,846 INFO L231 Difference]: Finished difference. Result has 271 places, 1352 transitions, 24815 flow [2023-11-29 05:22:40,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=22035, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24815, PETRI_PLACES=271, PETRI_TRANSITIONS=1352} [2023-11-29 05:22:40,848 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2023-11-29 05:22:40,848 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 1352 transitions, 24815 flow [2023-11-29 05:22:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 05:22:40,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:22:40,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:22:40,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:22:41,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:41,049 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:22:41,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:22:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1301203211, now seen corresponding path program 5 times [2023-11-29 05:22:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:22:41,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717085782] [2023-11-29 05:22:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:41,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:22:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:22:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:22:41,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:22:41,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717085782] [2023-11-29 05:22:41,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717085782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:22:41,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937204764] [2023-11-29 05:22:41,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:22:41,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:22:41,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:22:41,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac98ce7a-af55-42f4-a3ec-0c218e3d6dba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:22:41,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:22:41,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:22:41,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:22:41,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:22:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:22:41,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:22:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:22:42,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937204764] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:22:42,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:22:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 12] total 25 [2023-11-29 05:22:42,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846016064] [2023-11-29 05:22:42,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:22:42,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:22:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:22:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:22:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:22:42,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 51 [2023-11-29 05:22:42,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 1352 transitions, 24815 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:22:42,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:22:42,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 51 [2023-11-29 05:22:42,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:23:31,161 INFO L124 PetriNetUnfolderBase]: 105447/149751 cut-off events. [2023-11-29 05:23:31,161 INFO L125 PetriNetUnfolderBase]: For 1410333/1410333 co-relation queries the response was YES. [2023-11-29 05:23:33,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774161 conditions, 149751 events. 105447/149751 cut-off events. For 1410333/1410333 co-relation queries the response was YES. Maximal size of possible extension queue 5367. Compared 1105192 event pairs, 15147 based on Foata normal form. 2/143468 useless extension candidates. Maximal degree in co-relation 774061. Up to 54092 conditions per place. [2023-11-29 05:23:34,475 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 929 selfloop transitions, 759 changer transitions 12/1701 dead transitions. [2023-11-29 05:23:34,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1701 transitions, 31451 flow [2023-11-29 05:23:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:23:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:23:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 361 transitions. [2023-11-29 05:23:34,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718954248366013 [2023-11-29 05:23:34,478 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 361 transitions. [2023-11-29 05:23:34,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 361 transitions. [2023-11-29 05:23:34,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:23:34,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 361 transitions. [2023-11-29 05:23:34,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 24.066666666666666) internal successors, (361), 15 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:23:34,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 51.0) internal successors, (816), 16 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:23:34,482 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 51.0) internal successors, (816), 16 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:23:34,482 INFO L175 Difference]: Start difference. First operand has 271 places, 1352 transitions, 24815 flow. Second operand 15 states and 361 transitions. [2023-11-29 05:23:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1701 transitions, 31451 flow