./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:28,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:28,212 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:28,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:28,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:28,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:28,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:28,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:28,255 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:28,256 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:28,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:28,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:28,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:28,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:28,259 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:28,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:28,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:28,261 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:28,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:28,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:28,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:28,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:28,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:28,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:28,266 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:28,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:28,267 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:28,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:28,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:28,269 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:28,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:28,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:28,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:28,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:28,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:28,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:28,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:28,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:28,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:28,274 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:28,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:28,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:28,275 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-26 11:55:28,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:28,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:28,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:28,621 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:28,622 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:28,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-26 11:55:31,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:32,054 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:32,055 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-26 11:55:32,064 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/data/aefe735f4/1be5d4c8f8474ae4beb9a61b686538bb/FLAGeb382fb3a [2023-11-26 11:55:32,080 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/data/aefe735f4/1be5d4c8f8474ae4beb9a61b686538bb [2023-11-26 11:55:32,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:32,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:32,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:32,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:32,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:32,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6f9131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32, skipping insertion in model container [2023-11-26 11:55:32,096 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:32,421 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_9bb3e93d-b4f5-480a-92b9-266af20c6011/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-26 11:55:32,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:32,456 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:32,502 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_9bb3e93d-b4f5-480a-92b9-266af20c6011/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-26 11:55:32,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:32,522 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:32,522 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:32,530 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:32,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32 WrapperNode [2023-11-26 11:55:32,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:32,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:32,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:32,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:32,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,610 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 171 [2023-11-26 11:55:32,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:32,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:32,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:32,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:32,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,640 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,664 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:55:32,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:32,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:32,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:32,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:32,698 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (1/1) ... [2023-11-26 11:55:32,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:32,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:32,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:55:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:55:32,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:55:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:55:32,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:55:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:55:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:55:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:55:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:55:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:32,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:32,773 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:55:32,900 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:32,903 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:33,278 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:33,629 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:33,629 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:55:33,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:33 BoogieIcfgContainer [2023-11-26 11:55:33,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:33,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:33,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:33,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:33,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:32" (1/3) ... [2023-11-26 11:55:33,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8a07ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:33, skipping insertion in model container [2023-11-26 11:55:33,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:32" (2/3) ... [2023-11-26 11:55:33,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8a07ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:33, skipping insertion in model container [2023-11-26 11:55:33,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:33" (3/3) ... [2023-11-26 11:55:33,640 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-26 11:55:33,649 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:55:33,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:33,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:33,661 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:55:33,707 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:55:33,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2023-11-26 11:55:33,773 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-26 11:55:33,773 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:55:33,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-26 11:55:33,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2023-11-26 11:55:33,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2023-11-26 11:55:33,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:33,796 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;@751795ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:33,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:55:33,808 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:55:33,809 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-26 11:55:33,809 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:55:33,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:33,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:33,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:33,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2032880118, now seen corresponding path program 1 times [2023-11-26 11:55:33,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:33,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865612440] [2023-11-26 11:55:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:34,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865612440] [2023-11-26 11:55:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865612440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:34,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:34,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891491981] [2023-11-26 11:55:34,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:34,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:55:34,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:55:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:55:34,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-26 11:55:34,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 66 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:34,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-26 11:55:34,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:34,355 INFO L124 PetriNetUnfolderBase]: 112/217 cut-off events. [2023-11-26 11:55:34,356 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-26 11:55:34,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 217 events. 112/217 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 718 event pairs, 87 based on Foata normal form. 14/212 useless extension candidates. Maximal degree in co-relation 366. Up to 187 conditions per place. [2023-11-26 11:55:34,365 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 21 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-11-26 11:55:34,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 106 flow [2023-11-26 11:55:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:55:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-26 11:55:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2023-11-26 11:55:34,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-26 11:55:34,379 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 36 transitions. [2023-11-26 11:55:34,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 36 transitions. [2023-11-26 11:55:34,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:34,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 36 transitions. [2023-11-26 11:55:34,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,394 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,396 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 66 flow. Second operand 2 states and 36 transitions. [2023-11-26 11:55:34,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 106 flow [2023-11-26 11:55:34,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:34,405 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 56 flow [2023-11-26 11:55:34,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-26 11:55:34,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-26 11:55:34,414 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 56 flow [2023-11-26 11:55:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:34,415 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] [2023-11-26 11:55:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:34,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:34,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 992840007, now seen corresponding path program 1 times [2023-11-26 11:55:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975266623] [2023-11-26 11:55:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:34,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:34,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975266623] [2023-11-26 11:55:34,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975266623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:34,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:34,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:34,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117826180] [2023-11-26 11:55:34,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:34,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:34,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:34,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:34,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-26 11:55:34,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:34,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-26 11:55:34,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:34,783 INFO L124 PetriNetUnfolderBase]: 120/235 cut-off events. [2023-11-26 11:55:34,783 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:55:34,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 235 events. 120/235 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 748 event pairs, 37 based on Foata normal form. 3/224 useless extension candidates. Maximal degree in co-relation 445. Up to 168 conditions per place. [2023-11-26 11:55:34,787 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 25 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-26 11:55:34,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 127 flow [2023-11-26 11:55:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-26 11:55:34,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-26 11:55:34,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-26 11:55:34,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-26 11:55:34,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:34,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-26 11:55:34,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,792 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 56 flow. Second operand 3 states and 50 transitions. [2023-11-26 11:55:34,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 127 flow [2023-11-26 11:55:34,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:55:34,794 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 75 flow [2023-11-26 11:55:34,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-26 11:55:34,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-26 11:55:34,796 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 75 flow [2023-11-26 11:55:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:34,796 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] [2023-11-26 11:55:34,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:55:34,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:34,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -357843081, now seen corresponding path program 2 times [2023-11-26 11:55:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273543271] [2023-11-26 11:55:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:35,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:35,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273543271] [2023-11-26 11:55:35,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273543271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:35,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:35,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:35,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110185955] [2023-11-26 11:55:35,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:35,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:35,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:35,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-26 11:55:35,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:35,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:35,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-26 11:55:35,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:35,222 INFO L124 PetriNetUnfolderBase]: 133/276 cut-off events. [2023-11-26 11:55:35,222 INFO L125 PetriNetUnfolderBase]: For 48/50 co-relation queries the response was YES. [2023-11-26 11:55:35,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 276 events. 133/276 cut-off events. For 48/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 971 event pairs, 97 based on Foata normal form. 11/272 useless extension candidates. Maximal degree in co-relation 584. Up to 202 conditions per place. [2023-11-26 11:55:35,227 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 22 selfloop transitions, 2 changer transitions 8/37 dead transitions. [2023-11-26 11:55:35,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 159 flow [2023-11-26 11:55:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2023-11-26 11:55:35,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-26 11:55:35,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 60 transitions. [2023-11-26 11:55:35,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 60 transitions. [2023-11-26 11:55:35,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:35,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 60 transitions. [2023-11-26 11:55:35,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:35,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:35,232 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:35,233 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 75 flow. Second operand 4 states and 60 transitions. [2023-11-26 11:55:35,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 159 flow [2023-11-26 11:55:35,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:35,236 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 88 flow [2023-11-26 11:55:35,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-26 11:55:35,237 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-11-26 11:55:35,237 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 88 flow [2023-11-26 11:55:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:35,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:35,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:35,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:35,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2107095792, now seen corresponding path program 1 times [2023-11-26 11:55:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:35,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840414362] [2023-11-26 11:55:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:35,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:36,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840414362] [2023-11-26 11:55:36,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840414362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:36,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:36,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:36,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565583325] [2023-11-26 11:55:36,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:36,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:36,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:36,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 88 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:36,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:36,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:36,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:36,511 INFO L124 PetriNetUnfolderBase]: 182/358 cut-off events. [2023-11-26 11:55:36,511 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-26 11:55:36,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 358 events. 182/358 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1367 event pairs, 13 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 775. Up to 211 conditions per place. [2023-11-26 11:55:36,515 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 45 selfloop transitions, 13 changer transitions 6/68 dead transitions. [2023-11-26 11:55:36,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 315 flow [2023-11-26 11:55:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2023-11-26 11:55:36,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-11-26 11:55:36,518 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 124 transitions. [2023-11-26 11:55:36,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 124 transitions. [2023-11-26 11:55:36,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:36,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 124 transitions. [2023-11-26 11:55:36,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:36,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:36,522 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:36,522 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 88 flow. Second operand 10 states and 124 transitions. [2023-11-26 11:55:36,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 315 flow [2023-11-26 11:55:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 68 transitions, 305 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:36,526 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 154 flow [2023-11-26 11:55:36,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=154, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-26 11:55:36,527 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-26 11:55:36,528 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 154 flow [2023-11-26 11:55:36,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:36,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:36,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:55:36,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:36,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1231142744, now seen corresponding path program 2 times [2023-11-26 11:55:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817540642] [2023-11-26 11:55:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817540642] [2023-11-26 11:55:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817540642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:37,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955042040] [2023-11-26 11:55:37,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:37,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:37,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:37,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:37,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 154 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:37,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:37,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:37,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:37,458 INFO L124 PetriNetUnfolderBase]: 207/419 cut-off events. [2023-11-26 11:55:37,458 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-26 11:55:37,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 419 events. 207/419 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1780 event pairs, 30 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 1126. Up to 244 conditions per place. [2023-11-26 11:55:37,464 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 47 selfloop transitions, 20 changer transitions 6/77 dead transitions. [2023-11-26 11:55:37,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 444 flow [2023-11-26 11:55:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2023-11-26 11:55:37,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-11-26 11:55:37,469 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 127 transitions. [2023-11-26 11:55:37,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 127 transitions. [2023-11-26 11:55:37,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:37,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 127 transitions. [2023-11-26 11:55:37,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:37,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:37,479 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:37,479 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 154 flow. Second operand 10 states and 127 transitions. [2023-11-26 11:55:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 444 flow [2023-11-26 11:55:37,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 435 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-26 11:55:37,484 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 276 flow [2023-11-26 11:55:37,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-26 11:55:37,485 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-11-26 11:55:37,485 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 276 flow [2023-11-26 11:55:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:37,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:37,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:37,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:55:37,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:37,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1003573930, now seen corresponding path program 3 times [2023-11-26 11:55:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982868288] [2023-11-26 11:55:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:38,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982868288] [2023-11-26 11:55:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982868288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:38,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:38,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370729166] [2023-11-26 11:55:38,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:38,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:38,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:38,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:38,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:38,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:38,482 INFO L124 PetriNetUnfolderBase]: 225/475 cut-off events. [2023-11-26 11:55:38,482 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-26 11:55:38,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 475 events. 225/475 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2214 event pairs, 9 based on Foata normal form. 1/476 useless extension candidates. Maximal degree in co-relation 1477. Up to 230 conditions per place. [2023-11-26 11:55:38,488 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 26 changer transitions 6/88 dead transitions. [2023-11-26 11:55:38,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 88 transitions, 589 flow [2023-11-26 11:55:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:55:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:55:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2023-11-26 11:55:38,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2023-11-26 11:55:38,490 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 138 transitions. [2023-11-26 11:55:38,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 138 transitions. [2023-11-26 11:55:38,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:38,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 138 transitions. [2023-11-26 11:55:38,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:38,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:38,493 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:38,493 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 276 flow. Second operand 11 states and 138 transitions. [2023-11-26 11:55:38,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 88 transitions, 589 flow [2023-11-26 11:55:38,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 566 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-26 11:55:38,499 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 351 flow [2023-11-26 11:55:38,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=351, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-26 11:55:38,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2023-11-26 11:55:38,500 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 351 flow [2023-11-26 11:55:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:38,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:38,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:38,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:55:38,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:38,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2011195514, now seen corresponding path program 4 times [2023-11-26 11:55:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:38,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900388299] [2023-11-26 11:55:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:39,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900388299] [2023-11-26 11:55:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900388299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:39,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:39,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482364545] [2023-11-26 11:55:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:39,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:39,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 351 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:39,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:39,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:39,366 INFO L124 PetriNetUnfolderBase]: 224/484 cut-off events. [2023-11-26 11:55:39,367 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2023-11-26 11:55:39,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 484 events. 224/484 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2306 event pairs, 39 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 1642. Up to 295 conditions per place. [2023-11-26 11:55:39,373 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 22 changer transitions 6/84 dead transitions. [2023-11-26 11:55:39,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 649 flow [2023-11-26 11:55:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2023-11-26 11:55:39,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-11-26 11:55:39,378 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 126 transitions. [2023-11-26 11:55:39,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 126 transitions. [2023-11-26 11:55:39,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:39,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 126 transitions. [2023-11-26 11:55:39,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2023-11-26 11:55:39,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,381 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,381 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 351 flow. Second operand 10 states and 126 transitions. [2023-11-26 11:55:39,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 649 flow [2023-11-26 11:55:39,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 588 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-26 11:55:39,388 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 392 flow [2023-11-26 11:55:39,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=392, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-26 11:55:39,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2023-11-26 11:55:39,390 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 392 flow [2023-11-26 11:55:39,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:39,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:39,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:55:39,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:39,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1313799150, now seen corresponding path program 5 times [2023-11-26 11:55:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:39,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873264875] [2023-11-26 11:55:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:39,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873264875] [2023-11-26 11:55:39,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873264875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:39,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:39,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:39,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782102488] [2023-11-26 11:55:39,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:39,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:39,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:39,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:39,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:39,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:39,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:39,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:40,243 INFO L124 PetriNetUnfolderBase]: 238/523 cut-off events. [2023-11-26 11:55:40,243 INFO L125 PetriNetUnfolderBase]: For 1103/1103 co-relation queries the response was YES. [2023-11-26 11:55:40,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 523 events. 238/523 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2588 event pairs, 31 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 1784. Up to 320 conditions per place. [2023-11-26 11:55:40,249 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 56 selfloop transitions, 23 changer transitions 6/89 dead transitions. [2023-11-26 11:55:40,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 691 flow [2023-11-26 11:55:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2023-11-26 11:55:40,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-11-26 11:55:40,251 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 127 transitions. [2023-11-26 11:55:40,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 127 transitions. [2023-11-26 11:55:40,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:40,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 127 transitions. [2023-11-26 11:55:40,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:40,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:40,254 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:40,254 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 392 flow. Second operand 10 states and 127 transitions. [2023-11-26 11:55:40,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 691 flow [2023-11-26 11:55:40,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 648 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-26 11:55:40,261 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 436 flow [2023-11-26 11:55:40,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-11-26 11:55:40,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-11-26 11:55:40,262 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 436 flow [2023-11-26 11:55:40,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:40,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:40,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:40,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:55:40,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:40,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1011459612, now seen corresponding path program 6 times [2023-11-26 11:55:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:40,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588619411] [2023-11-26 11:55:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:40,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588619411] [2023-11-26 11:55:40,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588619411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:40,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:40,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:40,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143202998] [2023-11-26 11:55:40,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:40,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:40,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:40,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:40,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:40,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:40,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:40,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:41,000 INFO L124 PetriNetUnfolderBase]: 232/506 cut-off events. [2023-11-26 11:55:41,001 INFO L125 PetriNetUnfolderBase]: For 1650/1658 co-relation queries the response was YES. [2023-11-26 11:55:41,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 506 events. 232/506 cut-off events. For 1650/1658 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2486 event pairs, 31 based on Foata normal form. 9/515 useless extension candidates. Maximal degree in co-relation 1853. Up to 325 conditions per place. [2023-11-26 11:55:41,007 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 49 selfloop transitions, 22 changer transitions 9/84 dead transitions. [2023-11-26 11:55:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 701 flow [2023-11-26 11:55:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2023-11-26 11:55:41,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2023-11-26 11:55:41,010 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 121 transitions. [2023-11-26 11:55:41,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 121 transitions. [2023-11-26 11:55:41,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:41,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 121 transitions. [2023-11-26 11:55:41,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.1) internal successors, (121), 10 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) [2023-11-26 11:55:41,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,013 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 436 flow. Second operand 10 states and 121 transitions. [2023-11-26 11:55:41,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 701 flow [2023-11-26 11:55:41,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 644 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-26 11:55:41,020 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 432 flow [2023-11-26 11:55:41,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=432, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2023-11-26 11:55:41,021 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2023-11-26 11:55:41,022 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 432 flow [2023-11-26 11:55:41,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:41,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:41,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:55:41,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:41,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash -369583836, now seen corresponding path program 7 times [2023-11-26 11:55:41,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:41,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573233052] [2023-11-26 11:55:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:41,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:41,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573233052] [2023-11-26 11:55:41,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573233052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:41,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:41,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366756599] [2023-11-26 11:55:41,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:41,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:41,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:41,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:41,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:41,876 INFO L124 PetriNetUnfolderBase]: 244/539 cut-off events. [2023-11-26 11:55:41,876 INFO L125 PetriNetUnfolderBase]: For 1843/1855 co-relation queries the response was YES. [2023-11-26 11:55:41,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 539 events. 244/539 cut-off events. For 1843/1855 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2720 event pairs, 41 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 1969. Up to 332 conditions per place. [2023-11-26 11:55:41,883 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 59 selfloop transitions, 23 changer transitions 6/92 dead transitions. [2023-11-26 11:55:41,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 780 flow [2023-11-26 11:55:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2023-11-26 11:55:41,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-11-26 11:55:41,884 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 129 transitions. [2023-11-26 11:55:41,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 129 transitions. [2023-11-26 11:55:41,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:41,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 129 transitions. [2023-11-26 11:55:41,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,887 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,887 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 432 flow. Second operand 10 states and 129 transitions. [2023-11-26 11:55:41,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 780 flow [2023-11-26 11:55:41,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 726 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-26 11:55:41,895 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 475 flow [2023-11-26 11:55:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=475, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-11-26 11:55:41,898 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-11-26 11:55:41,898 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 475 flow [2023-11-26 11:55:41,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:41,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:41,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:55:41,899 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:41,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash 955272416, now seen corresponding path program 8 times [2023-11-26 11:55:41,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:41,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298862004] [2023-11-26 11:55:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:42,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298862004] [2023-11-26 11:55:42,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298862004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:42,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:42,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10816606] [2023-11-26 11:55:42,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:42,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:42,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:42,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:42,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:42,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 475 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:42,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:42,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:42,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:42,649 INFO L124 PetriNetUnfolderBase]: 238/522 cut-off events. [2023-11-26 11:55:42,650 INFO L125 PetriNetUnfolderBase]: For 2568/2596 co-relation queries the response was YES. [2023-11-26 11:55:42,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 522 events. 238/522 cut-off events. For 2568/2596 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2610 event pairs, 41 based on Foata normal form. 11/533 useless extension candidates. Maximal degree in co-relation 2033. Up to 337 conditions per place. [2023-11-26 11:55:42,656 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 22 changer transitions 9/87 dead transitions. [2023-11-26 11:55:42,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 781 flow [2023-11-26 11:55:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2023-11-26 11:55:42,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-11-26 11:55:42,658 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 123 transitions. [2023-11-26 11:55:42,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 123 transitions. [2023-11-26 11:55:42,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:42,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 123 transitions. [2023-11-26 11:55:42,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:42,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:42,660 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:42,660 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 475 flow. Second operand 10 states and 123 transitions. [2023-11-26 11:55:42,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 781 flow [2023-11-26 11:55:42,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 714 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-26 11:55:42,670 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 463 flow [2023-11-26 11:55:42,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2023-11-26 11:55:42,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2023-11-26 11:55:42,671 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 463 flow [2023-11-26 11:55:42,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:42,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:42,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:55:42,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:42,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash 683045202, now seen corresponding path program 9 times [2023-11-26 11:55:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:42,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494182577] [2023-11-26 11:55:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:43,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:43,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494182577] [2023-11-26 11:55:43,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494182577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668371187] [2023-11-26 11:55:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:43,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:43,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 463 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:43,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:43,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:43,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:43,574 INFO L124 PetriNetUnfolderBase]: 254/558 cut-off events. [2023-11-26 11:55:43,574 INFO L125 PetriNetUnfolderBase]: For 2813/2837 co-relation queries the response was YES. [2023-11-26 11:55:43,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 558 events. 254/558 cut-off events. For 2813/2837 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2786 event pairs, 48 based on Foata normal form. 5/562 useless extension candidates. Maximal degree in co-relation 2162. Up to 344 conditions per place. [2023-11-26 11:55:43,581 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 62 selfloop transitions, 22 changer transitions 6/94 dead transitions. [2023-11-26 11:55:43,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 834 flow [2023-11-26 11:55:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2023-11-26 11:55:43,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-26 11:55:43,583 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 130 transitions. [2023-11-26 11:55:43,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 130 transitions. [2023-11-26 11:55:43,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:43,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 130 transitions. [2023-11-26 11:55:43,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:43,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:43,585 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:43,586 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 463 flow. Second operand 10 states and 130 transitions. [2023-11-26 11:55:43,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 834 flow [2023-11-26 11:55:43,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 778 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-26 11:55:43,597 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 512 flow [2023-11-26 11:55:43,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=512, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-11-26 11:55:43,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-11-26 11:55:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 512 flow [2023-11-26 11:55:43,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:43,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:43,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:43,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:55:43,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:43,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2132823730, now seen corresponding path program 10 times [2023-11-26 11:55:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:43,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146506862] [2023-11-26 11:55:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:44,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146506862] [2023-11-26 11:55:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146506862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:44,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:44,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506517506] [2023-11-26 11:55:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:44,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:55:44,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:44,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:55:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:44,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-26 11:55:44,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:44,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-26 11:55:44,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:44,393 INFO L124 PetriNetUnfolderBase]: 248/541 cut-off events. [2023-11-26 11:55:44,393 INFO L125 PetriNetUnfolderBase]: For 3722/3764 co-relation queries the response was YES. [2023-11-26 11:55:44,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 541 events. 248/541 cut-off events. For 3722/3764 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2672 event pairs, 48 based on Foata normal form. 13/553 useless extension candidates. Maximal degree in co-relation 2212. Up to 349 conditions per place. [2023-11-26 11:55:44,400 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 55 selfloop transitions, 21 changer transitions 9/89 dead transitions. [2023-11-26 11:55:44,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 825 flow [2023-11-26 11:55:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2023-11-26 11:55:44,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-11-26 11:55:44,403 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 124 transitions. [2023-11-26 11:55:44,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 124 transitions. [2023-11-26 11:55:44,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:44,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 124 transitions. [2023-11-26 11:55:44,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,405 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,405 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 512 flow. Second operand 10 states and 124 transitions. [2023-11-26 11:55:44,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 825 flow [2023-11-26 11:55:44,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 750 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-26 11:55:44,420 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 492 flow [2023-11-26 11:55:44,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=492, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2023-11-26 11:55:44,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2023-11-26 11:55:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 492 flow [2023-11-26 11:55:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:44,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:55:44,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:44,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1351556760, now seen corresponding path program 1 times [2023-11-26 11:55:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941027136] [2023-11-26 11:55:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:44,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:44,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941027136] [2023-11-26 11:55:44,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941027136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:44,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645981672] [2023-11-26 11:55:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:44,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:44,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:44,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:44,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:44,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:44,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645981672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:45,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 11:55:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324731271] [2023-11-26 11:55:45,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:45,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:55:45,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:55:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:55:45,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-26 11:55:45,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:45,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:45,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-26 11:55:45,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:45,315 INFO L124 PetriNetUnfolderBase]: 399/948 cut-off events. [2023-11-26 11:55:45,315 INFO L125 PetriNetUnfolderBase]: For 6931/6981 co-relation queries the response was YES. [2023-11-26 11:55:45,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 948 events. 399/948 cut-off events. For 6931/6981 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5747 event pairs, 198 based on Foata normal form. 38/985 useless extension candidates. Maximal degree in co-relation 3884. Up to 410 conditions per place. [2023-11-26 11:55:45,328 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 108 selfloop transitions, 5 changer transitions 10/128 dead transitions. [2023-11-26 11:55:45,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1211 flow [2023-11-26 11:55:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2023-11-26 11:55:45,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2023-11-26 11:55:45,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 91 transitions. [2023-11-26 11:55:45,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 91 transitions. [2023-11-26 11:55:45,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:45,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 91 transitions. [2023-11-26 11:55:45,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:45,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:45,332 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:45,332 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 492 flow. Second operand 6 states and 91 transitions. [2023-11-26 11:55:45,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1211 flow [2023-11-26 11:55:45,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 1101 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-26 11:55:45,355 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 481 flow [2023-11-26 11:55:45,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=481, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-11-26 11:55:45,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-11-26 11:55:45,356 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 481 flow [2023-11-26 11:55:45,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:45,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:45,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:45,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:55:45,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:45,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -660659320, now seen corresponding path program 1 times [2023-11-26 11:55:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:45,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130710772] [2023-11-26 11:55:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:45,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:45,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130710772] [2023-11-26 11:55:45,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130710772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:45,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862305150] [2023-11-26 11:55:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:45,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:45,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:45,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:45,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:45,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:55:45,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:45,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862305150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:55:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-26 11:55:45,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999368644] [2023-11-26 11:55:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:45,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:45,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-26 11:55:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:45,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-26 11:55:45,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:46,207 INFO L124 PetriNetUnfolderBase]: 368/947 cut-off events. [2023-11-26 11:55:46,207 INFO L125 PetriNetUnfolderBase]: For 7342/7480 co-relation queries the response was YES. [2023-11-26 11:55:46,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 947 events. 368/947 cut-off events. For 7342/7480 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5899 event pairs, 103 based on Foata normal form. 94/1040 useless extension candidates. Maximal degree in co-relation 3728. Up to 363 conditions per place. [2023-11-26 11:55:46,218 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 58 selfloop transitions, 7 changer transitions 26/96 dead transitions. [2023-11-26 11:55:46,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 96 transitions, 817 flow [2023-11-26 11:55:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:55:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:55:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2023-11-26 11:55:46,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-26 11:55:46,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 81 transitions. [2023-11-26 11:55:46,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 81 transitions. [2023-11-26 11:55:46,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:46,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 81 transitions. [2023-11-26 11:55:46,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:46,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:46,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:46,222 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 481 flow. Second operand 4 states and 81 transitions. [2023-11-26 11:55:46,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 96 transitions, 817 flow [2023-11-26 11:55:46,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 793 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:46,241 INFO L231 Difference]: Finished difference. Result has 87 places, 42 transitions, 298 flow [2023-11-26 11:55:46,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=87, PETRI_TRANSITIONS=42} [2023-11-26 11:55:46,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-11-26 11:55:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 42 transitions, 298 flow [2023-11-26 11:55:46,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:46,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:46,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:46,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:46,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:55:46,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:46,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:46,450 INFO L85 PathProgramCache]: Analyzing trace with hash -5493835, now seen corresponding path program 2 times [2023-11-26 11:55:46,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:46,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430973980] [2023-11-26 11:55:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:47,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430973980] [2023-11-26 11:55:47,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430973980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893354858] [2023-11-26 11:55:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:47,058 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:47,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:47,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:55:47,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:47,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:55:47,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:47,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-26 11:55:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:47,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:47,718 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:55:47,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-26 11:55:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893354858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:47,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-26 11:55:48,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735607057] [2023-11-26 11:55:48,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:48,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:55:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:55:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:55:48,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-26 11:55:48,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 42 transitions, 298 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:48,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:48,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-26 11:55:48,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:49,162 INFO L124 PetriNetUnfolderBase]: 862/1714 cut-off events. [2023-11-26 11:55:49,163 INFO L125 PetriNetUnfolderBase]: For 15339/15339 co-relation queries the response was YES. [2023-11-26 11:55:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 1714 events. 862/1714 cut-off events. For 15339/15339 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9476 event pairs, 90 based on Foata normal form. 130/1843 useless extension candidates. Maximal degree in co-relation 7130. Up to 343 conditions per place. [2023-11-26 11:55:49,186 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 123 selfloop transitions, 20 changer transitions 8/154 dead transitions. [2023-11-26 11:55:49,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 154 transitions, 1378 flow [2023-11-26 11:55:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:55:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:55:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 191 transitions. [2023-11-26 11:55:49,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2023-11-26 11:55:49,188 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 191 transitions. [2023-11-26 11:55:49,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 191 transitions. [2023-11-26 11:55:49,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:49,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 191 transitions. [2023-11-26 11:55:49,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 13.642857142857142) internal successors, (191), 14 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,191 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,191 INFO L175 Difference]: Start difference. First operand has 87 places, 42 transitions, 298 flow. Second operand 14 states and 191 transitions. [2023-11-26 11:55:49,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 154 transitions, 1378 flow [2023-11-26 11:55:49,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 154 transitions, 1053 flow, removed 148 selfloop flow, removed 17 redundant places. [2023-11-26 11:55:49,226 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 446 flow [2023-11-26 11:55:49,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=446, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-26 11:55:49,227 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2023-11-26 11:55:49,227 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 446 flow [2023-11-26 11:55:49,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:49,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:49,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:49,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:55:49,434 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:49,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1592843966, now seen corresponding path program 3 times [2023-11-26 11:55:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63027327] [2023-11-26 11:55:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:50,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:50,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63027327] [2023-11-26 11:55:50,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63027327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:50,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643149853] [2023-11-26 11:55:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:55:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:50,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:50,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:50,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:55:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:50,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:55:50,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:55:50,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:50,996 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:55:50,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-26 11:55:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:55:51,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643149853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:51,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:51,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2023-11-26 11:55:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531033614] [2023-11-26 11:55:51,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:55:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:55:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:55:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-26 11:55:51,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 446 flow. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 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) [2023-11-26 11:55:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-26 11:55:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:51,708 INFO L124 PetriNetUnfolderBase]: 843/1693 cut-off events. [2023-11-26 11:55:51,708 INFO L125 PetriNetUnfolderBase]: For 5675/5675 co-relation queries the response was YES. [2023-11-26 11:55:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6154 conditions, 1693 events. 843/1693 cut-off events. For 5675/5675 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9192 event pairs, 116 based on Foata normal form. 30/1721 useless extension candidates. Maximal degree in co-relation 6132. Up to 537 conditions per place. [2023-11-26 11:55:51,729 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 104 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2023-11-26 11:55:51,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 135 transitions, 1241 flow [2023-11-26 11:55:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:55:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:55:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 156 transitions. [2023-11-26 11:55:51,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-26 11:55:51,731 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 156 transitions. [2023-11-26 11:55:51,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 156 transitions. [2023-11-26 11:55:51,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:51,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 156 transitions. [2023-11-26 11:55:51,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:51,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:51,735 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:51,735 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 446 flow. Second operand 13 states and 156 transitions. [2023-11-26 11:55:51,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 135 transitions, 1241 flow [2023-11-26 11:55:51,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 135 transitions, 1149 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:51,754 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 570 flow [2023-11-26 11:55:51,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=570, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2023-11-26 11:55:51,755 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-11-26 11:55:51,755 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 570 flow [2023-11-26 11:55:51,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 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) [2023-11-26 11:55:51,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:51,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:51,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:55:51,968 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1498512069, now seen corresponding path program 1 times [2023-11-26 11:55:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79250864] [2023-11-26 11:55:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:53,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:53,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79250864] [2023-11-26 11:55:53,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79250864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:53,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956298875] [2023-11-26 11:55:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:53,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:53,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:53,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:53,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bb3e93d-b4f5-480a-92b9-266af20c6011/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:54,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-26 11:55:54,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:55,614 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-26 11:55:55,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-11-26 11:55:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:56,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:57,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:57,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-26 11:55:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956298875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:58,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2023-11-26 11:55:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535913391] [2023-11-26 11:55:58,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:58,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-26 11:55:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-26 11:55:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2434, Unknown=0, NotChecked=0, Total=2652 [2023-11-26 11:55:59,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-26 11:55:59,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 570 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:59,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:59,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-26 11:55:59,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:17,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]