./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.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_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI --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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:43:17,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:43:17,164 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:43:17,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:43:17,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:43:17,210 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:43:17,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:43:17,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:43:17,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:43:17,219 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:43:17,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:43:17,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:43:17,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:43:17,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:43:17,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:43:17,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:43:17,224 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:43:17,225 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:43:17,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:43:17,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:43:17,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:43:17,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:43:17,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:43:17,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:43:17,228 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:43:17,229 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:43:17,229 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:43:17,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:43:17,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:43:17,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:43:17,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:43:17,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:17,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:43:17,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:43:17,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:43:17,234 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:43:17,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:43:17,235 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:43:17,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:43:17,235 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:43:17,235 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:43:17,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:43:17,236 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_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2023-11-24 21:43:17,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:43:17,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:43:17,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:43:17,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:43:17,575 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:43:17,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-24 21:43:20,638 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:20,854 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:20,854 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-24 21:43:20,863 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/data/63afde346/322f5980c4ec46bcb893108d3f51b5eb/FLAG8b911119f [2023-11-24 21:43:20,879 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/data/63afde346/322f5980c4ec46bcb893108d3f51b5eb [2023-11-24 21:43:20,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:20,883 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:20,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:20,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:20,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:20,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:20" (1/1) ... [2023-11-24 21:43:20,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45aca14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:20, skipping insertion in model container [2023-11-24 21:43:20,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:20" (1/1) ... [2023-11-24 21:43:20,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:21,118 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_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2023-11-24 21:43:21,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:21,138 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:21,183 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_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2023-11-24 21:43:21,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:21,220 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:21,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21 WrapperNode [2023-11-24 21:43:21,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:21,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:21,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:21,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:21,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,270 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 167 [2023-11-24 21:43:21,271 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:21,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:21,272 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:21,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:21,283 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,288 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,305 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 7, 2]. 54 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]. [2023-11-24 21:43:21,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,323 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:21,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:21,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:21,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:21,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (1/1) ... [2023-11-24 21:43:21,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:21,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:21,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:43:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:43:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:43:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:43:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:43:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:43:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:43:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:43:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:43:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:43:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:43:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:43:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:43:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:43:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:43:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:43:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:43:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:43:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:21,420 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:43:21,593 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:21,595 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:21,902 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:22,322 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:22,323 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:43:22,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:22 BoogieIcfgContainer [2023-11-24 21:43:22,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:22,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:22,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:22,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:22,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:20" (1/3) ... [2023-11-24 21:43:22,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2ec2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:22, skipping insertion in model container [2023-11-24 21:43:22,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:21" (2/3) ... [2023-11-24 21:43:22,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2ec2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:22, skipping insertion in model container [2023-11-24 21:43:22,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:22" (3/3) ... [2023-11-24 21:43:22,334 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-11-24 21:43:22,344 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:43:22,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:22,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:43:22,355 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:43:22,416 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:43:22,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-24 21:43:22,506 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-24 21:43:22,506 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:43:22,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-24 21:43:22,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-24 21:43:22,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-24 21:43:22,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:22,542 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;@16e68838, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:22,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 21:43:22,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:43:22,559 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-24 21:43:22,559 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:43:22,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:22,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:22,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:22,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash -953264648, now seen corresponding path program 1 times [2023-11-24 21:43:22,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:22,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087311622] [2023-11-24 21:43:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:23,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:23,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087311622] [2023-11-24 21:43:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087311622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:23,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:23,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033396160] [2023-11-24 21:43:23,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:23,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:23,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:23,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:23,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:23,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:23,304 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2023-11-24 21:43:23,304 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-24 21:43:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-24 21:43:23,309 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-11-24 21:43:23,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2023-11-24 21:43:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-24 21:43:23,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-24 21:43:23,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-24 21:43:23,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-24 21:43:23,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:23,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-24 21:43:23,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,334 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2023-11-24 21:43:23,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2023-11-24 21:43:23,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:23,341 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-11-24 21:43:23,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-11-24 21:43:23,350 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-24 21:43:23,350 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-11-24 21:43:23,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:23,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:23,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:23,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1689825126, now seen corresponding path program 1 times [2023-11-24 21:43:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:23,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023134820] [2023-11-24 21:43:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:23,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023134820] [2023-11-24 21:43:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023134820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:23,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:23,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:23,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249835259] [2023-11-24 21:43:23,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:23,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:23,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:24,117 INFO L124 PetriNetUnfolderBase]: 75/133 cut-off events. [2023-11-24 21:43:24,117 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:43:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 133 events. 75/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 342 event pairs, 1 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 269. Up to 89 conditions per place. [2023-11-24 21:43:24,120 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 33 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-11-24 21:43:24,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 46 transitions, 201 flow [2023-11-24 21:43:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-24 21:43:24,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-24 21:43:24,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-24 21:43:24,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-24 21:43:24,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:24,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-24 21:43:24,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,125 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,125 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 6 states and 63 transitions. [2023-11-24 21:43:24,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 46 transitions, 201 flow [2023-11-24 21:43:24,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 46 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:24,128 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 119 flow [2023-11-24 21:43:24,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2023-11-24 21:43:24,129 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2023-11-24 21:43:24,129 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 119 flow [2023-11-24 21:43:24,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:24,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:24,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:24,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:24,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1465931414, now seen corresponding path program 2 times [2023-11-24 21:43:24,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:24,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150862871] [2023-11-24 21:43:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150862871] [2023-11-24 21:43:24,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150862871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:24,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:24,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642306478] [2023-11-24 21:43:24,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:24,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:24,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:24,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:24,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:24,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:24,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:24,839 INFO L124 PetriNetUnfolderBase]: 85/149 cut-off events. [2023-11-24 21:43:24,840 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-24 21:43:24,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 149 events. 85/149 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 382 event pairs, 6 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 445. Up to 99 conditions per place. [2023-11-24 21:43:24,845 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-11-24 21:43:24,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 294 flow [2023-11-24 21:43:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2023-11-24 21:43:24,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-24 21:43:24,850 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2023-11-24 21:43:24,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2023-11-24 21:43:24,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:24,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2023-11-24 21:43:24,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,856 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,857 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 119 flow. Second operand 6 states and 62 transitions. [2023-11-24 21:43:24,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 294 flow [2023-11-24 21:43:24,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 286 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-24 21:43:24,864 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 214 flow [2023-11-24 21:43:24,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-11-24 21:43:24,866 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-24 21:43:24,866 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 214 flow [2023-11-24 21:43:24,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:24,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:24,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:24,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:24,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1638502336, now seen corresponding path program 3 times [2023-11-24 21:43:24,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493628809] [2023-11-24 21:43:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:25,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493628809] [2023-11-24 21:43:25,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493628809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:25,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416536119] [2023-11-24 21:43:25,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:25,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:25,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:25,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:25,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:25,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:25,406 INFO L124 PetriNetUnfolderBase]: 101/189 cut-off events. [2023-11-24 21:43:25,406 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-24 21:43:25,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 189 events. 101/189 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 552 event pairs, 23 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 641. Up to 88 conditions per place. [2023-11-24 21:43:25,413 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 44 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2023-11-24 21:43:25,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 404 flow [2023-11-24 21:43:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2023-11-24 21:43:25,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2023-11-24 21:43:25,415 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 58 transitions. [2023-11-24 21:43:25,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 58 transitions. [2023-11-24 21:43:25,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:25,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 58 transitions. [2023-11-24 21:43:25,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:25,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-24 21:43:25,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 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) [2023-11-24 21:43:25,418 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 214 flow. Second operand 5 states and 58 transitions. [2023-11-24 21:43:25,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 404 flow [2023-11-24 21:43:25,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 380 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:25,427 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 256 flow [2023-11-24 21:43:25,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-11-24 21:43:25,429 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-24 21:43:25,430 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 256 flow [2023-11-24 21:43:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:25,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:25,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:25,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:25,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:25,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash -773427632, now seen corresponding path program 4 times [2023-11-24 21:43:25,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:25,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105661764] [2023-11-24 21:43:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105661764] [2023-11-24 21:43:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105661764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:25,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363882096] [2023-11-24 21:43:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:25,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:25,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:25,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:25,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:25,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:25,997 INFO L124 PetriNetUnfolderBase]: 98/179 cut-off events. [2023-11-24 21:43:25,997 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2023-11-24 21:43:25,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 179 events. 98/179 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 505 event pairs, 9 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 642. Up to 128 conditions per place. [2023-11-24 21:43:26,000 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 36 selfloop transitions, 18 changer transitions 0/55 dead transitions. [2023-11-24 21:43:26,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 395 flow [2023-11-24 21:43:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2023-11-24 21:43:26,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-11-24 21:43:26,002 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 64 transitions. [2023-11-24 21:43:26,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 64 transitions. [2023-11-24 21:43:26,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:26,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 64 transitions. [2023-11-24 21:43:26,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,004 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 256 flow. Second operand 6 states and 64 transitions. [2023-11-24 21:43:26,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 395 flow [2023-11-24 21:43:26,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 391 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-24 21:43:26,009 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 295 flow [2023-11-24 21:43:26,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-24 21:43:26,010 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-24 21:43:26,011 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 295 flow [2023-11-24 21:43:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:26,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:26,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:26,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:26,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -385578062, now seen corresponding path program 5 times [2023-11-24 21:43:26,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:26,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470683976] [2023-11-24 21:43:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:26,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:26,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470683976] [2023-11-24 21:43:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470683976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:26,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:26,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:26,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312017212] [2023-11-24 21:43:26,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:26,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:26,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:26,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:26,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:26,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:26,467 INFO L124 PetriNetUnfolderBase]: 100/188 cut-off events. [2023-11-24 21:43:26,468 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-11-24 21:43:26,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 188 events. 100/188 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 563 event pairs, 8 based on Foata normal form. 1/174 useless extension candidates. Maximal degree in co-relation 728. Up to 125 conditions per place. [2023-11-24 21:43:26,470 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 34 selfloop transitions, 20 changer transitions 2/57 dead transitions. [2023-11-24 21:43:26,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 453 flow [2023-11-24 21:43:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:43:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:43:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2023-11-24 21:43:26,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-24 21:43:26,472 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 67 transitions. [2023-11-24 21:43:26,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 67 transitions. [2023-11-24 21:43:26,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:26,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 67 transitions. [2023-11-24 21:43:26,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,474 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,474 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 295 flow. Second operand 7 states and 67 transitions. [2023-11-24 21:43:26,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 453 flow [2023-11-24 21:43:26,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 426 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-24 21:43:26,480 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 329 flow [2023-11-24 21:43:26,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=329, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-24 21:43:26,481 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-11-24 21:43:26,481 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 329 flow [2023-11-24 21:43:26,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:26,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:26,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:26,482 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:26,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash -409263640, now seen corresponding path program 6 times [2023-11-24 21:43:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:26,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736420803] [2023-11-24 21:43:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:26,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:26,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736420803] [2023-11-24 21:43:26,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736420803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:26,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:26,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:26,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787820994] [2023-11-24 21:43:26,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:26,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:26,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:26,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:26,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:26,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:26,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:27,014 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2023-11-24 21:43:27,014 INFO L125 PetriNetUnfolderBase]: For 468/468 co-relation queries the response was YES. [2023-11-24 21:43:27,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 225 events. 118/225 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 741 event pairs, 4 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 890. Up to 93 conditions per place. [2023-11-24 21:43:27,018 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 39 selfloop transitions, 26 changer transitions 2/68 dead transitions. [2023-11-24 21:43:27,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 556 flow [2023-11-24 21:43:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:43:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:43:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2023-11-24 21:43:27,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-24 21:43:27,023 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 80 transitions. [2023-11-24 21:43:27,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 80 transitions. [2023-11-24 21:43:27,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:27,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 80 transitions. [2023-11-24 21:43:27,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2023-11-24 21:43:27,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:27,026 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:27,027 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 329 flow. Second operand 8 states and 80 transitions. [2023-11-24 21:43:27,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 556 flow [2023-11-24 21:43:27,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 464 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-11-24 21:43:27,036 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 370 flow [2023-11-24 21:43:27,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-24 21:43:27,038 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-11-24 21:43:27,038 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 370 flow [2023-11-24 21:43:27,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:27,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:27,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:27,039 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:27,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -494842561, now seen corresponding path program 1 times [2023-11-24 21:43:27,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:27,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297024746] [2023-11-24 21:43:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:27,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297024746] [2023-11-24 21:43:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297024746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824939217] [2023-11-24 21:43:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:27,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:27,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:27,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:27,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:27,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 21:43:27,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:27,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:43:28,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:43:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:28,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:29,865 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 33 treesize of output 29 [2023-11-24 21:43:29,886 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:29,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 41 [2023-11-24 21:43:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824939217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:29,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2023-11-24 21:43:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796976889] [2023-11-24 21:43:29,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:29,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:43:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:43:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:43:29,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:29,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 370 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:29,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:29,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:29,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:36,128 INFO L124 PetriNetUnfolderBase]: 471/890 cut-off events. [2023-11-24 21:43:36,128 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2023-11-24 21:43:36,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 890 events. 471/890 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4449 event pairs, 20 based on Foata normal form. 6/794 useless extension candidates. Maximal degree in co-relation 3143. Up to 273 conditions per place. [2023-11-24 21:43:36,139 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 144 selfloop transitions, 91 changer transitions 51/287 dead transitions. [2023-11-24 21:43:36,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 287 transitions, 2217 flow [2023-11-24 21:43:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-24 21:43:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-24 21:43:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 368 transitions. [2023-11-24 21:43:36,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46115288220551376 [2023-11-24 21:43:36,143 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 368 transitions. [2023-11-24 21:43:36,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 368 transitions. [2023-11-24 21:43:36,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:36,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 368 transitions. [2023-11-24 21:43:36,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 9.68421052631579) internal successors, (368), 38 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,149 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,149 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 370 flow. Second operand 38 states and 368 transitions. [2023-11-24 21:43:36,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 287 transitions, 2217 flow [2023-11-24 21:43:36,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 287 transitions, 2040 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-11-24 21:43:36,167 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 1205 flow [2023-11-24 21:43:36,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1205, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2023-11-24 21:43:36,168 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 75 predicate places. [2023-11-24 21:43:36,168 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 1205 flow [2023-11-24 21:43:36,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:36,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:36,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:36,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:43:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:36,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:36,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1855231469, now seen corresponding path program 2 times [2023-11-24 21:43:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363689682] [2023-11-24 21:43:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:36,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363689682] [2023-11-24 21:43:36,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363689682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183040258] [2023-11-24 21:43:36,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:36,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:36,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:36,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:43:36,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:43:36,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:36,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:43:36,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:36,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:43:37,165 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:37,166 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 115 treesize of output 104 [2023-11-24 21:43:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:37,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:38,896 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 87 treesize of output 77 [2023-11-24 21:43:38,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:38,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2023-11-24 21:43:40,482 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 33 treesize of output 29 [2023-11-24 21:43:40,489 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:43:40,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 1 [2023-11-24 21:43:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183040258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:40,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-24 21:43:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637705817] [2023-11-24 21:43:40,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:43:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:43:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:43:40,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:40,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 1205 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:40,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:40,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:40,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:45,398 INFO L124 PetriNetUnfolderBase]: 635/1223 cut-off events. [2023-11-24 21:43:45,398 INFO L125 PetriNetUnfolderBase]: For 2774/2774 co-relation queries the response was YES. [2023-11-24 21:43:45,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5770 conditions, 1223 events. 635/1223 cut-off events. For 2774/2774 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6699 event pairs, 19 based on Foata normal form. 9/1080 useless extension candidates. Maximal degree in co-relation 5574. Up to 538 conditions per place. [2023-11-24 21:43:45,413 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 157 selfloop transitions, 131 changer transitions 35/324 dead transitions. [2023-11-24 21:43:45,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 324 transitions, 3195 flow [2023-11-24 21:43:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 21:43:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-24 21:43:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 276 transitions. [2023-11-24 21:43:45,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2023-11-24 21:43:45,417 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 276 transitions. [2023-11-24 21:43:45,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 276 transitions. [2023-11-24 21:43:45,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:45,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 276 transitions. [2023-11-24 21:43:45,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 9.2) internal successors, (276), 30 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:45,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 21.0) internal successors, (651), 31 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:45,421 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 21.0) internal successors, (651), 31 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:45,421 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 1205 flow. Second operand 30 states and 276 transitions. [2023-11-24 21:43:45,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 324 transitions, 3195 flow [2023-11-24 21:43:45,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 324 transitions, 2520 flow, removed 306 selfloop flow, removed 7 redundant places. [2023-11-24 21:43:45,477 INFO L231 Difference]: Finished difference. Result has 125 places, 204 transitions, 1887 flow [2023-11-24 21:43:45,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1887, PETRI_PLACES=125, PETRI_TRANSITIONS=204} [2023-11-24 21:43:45,478 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2023-11-24 21:43:45,479 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 204 transitions, 1887 flow [2023-11-24 21:43:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:45,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:45,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:45,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:45,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:45,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:45,686 INFO L85 PathProgramCache]: Analyzing trace with hash -875381067, now seen corresponding path program 3 times [2023-11-24 21:43:45,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:45,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377678163] [2023-11-24 21:43:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:45,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:45,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:45,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377678163] [2023-11-24 21:43:45,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377678163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:45,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588148677] [2023-11-24 21:43:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:43:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:45,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:45,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:45,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:43:46,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:43:46,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:46,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:43:46,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:46,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:46,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588148677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:46,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:46,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-24 21:43:46,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346930912] [2023-11-24 21:43:46,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:46,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:43:46,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:43:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:43:46,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:46,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 204 transitions, 1887 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:46,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:46,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:46,923 INFO L124 PetriNetUnfolderBase]: 637/1226 cut-off events. [2023-11-24 21:43:46,923 INFO L125 PetriNetUnfolderBase]: For 2710/2710 co-relation queries the response was YES. [2023-11-24 21:43:46,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5391 conditions, 1226 events. 637/1226 cut-off events. For 2710/2710 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6697 event pairs, 192 based on Foata normal form. 10/1167 useless extension candidates. Maximal degree in co-relation 5158. Up to 1014 conditions per place. [2023-11-24 21:43:46,941 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 196 selfloop transitions, 49 changer transitions 0/246 dead transitions. [2023-11-24 21:43:46,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 246 transitions, 2578 flow [2023-11-24 21:43:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:43:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:43:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2023-11-24 21:43:46,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-24 21:43:46,943 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 105 transitions. [2023-11-24 21:43:46,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 105 transitions. [2023-11-24 21:43:46,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:46,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 105 transitions. [2023-11-24 21:43:46,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,945 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,946 INFO L175 Difference]: Start difference. First operand has 125 places, 204 transitions, 1887 flow. Second operand 12 states and 105 transitions. [2023-11-24 21:43:46,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 246 transitions, 2578 flow [2023-11-24 21:43:46,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 246 transitions, 2462 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-11-24 21:43:46,985 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 2006 flow [2023-11-24 21:43:46,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2006, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2023-11-24 21:43:46,986 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 106 predicate places. [2023-11-24 21:43:46,987 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 2006 flow [2023-11-24 21:43:46,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:46,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:47,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:47,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:43:47,194 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:47,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1739082137, now seen corresponding path program 4 times [2023-11-24 21:43:47,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:47,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18543651] [2023-11-24 21:43:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18543651] [2023-11-24 21:43:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18543651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022241796] [2023-11-24 21:43:47,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:43:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:47,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:47,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:43:47,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:43:47,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:47,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:43:47,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:47,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:43:47,922 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:47,923 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 115 treesize of output 104 [2023-11-24 21:43:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:48,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:49,490 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 33 treesize of output 29 [2023-11-24 21:43:49,501 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:49,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 41 [2023-11-24 21:43:49,528 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 87 treesize of output 77 [2023-11-24 21:43:49,596 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2023-11-24 21:43:49,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2023-11-24 21:43:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:50,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022241796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:50,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:50,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-24 21:43:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063143143] [2023-11-24 21:43:50,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:50,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:43:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:50,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:43:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:43:50,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:50,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 2006 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:50,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:50,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:50,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:53,461 INFO L124 PetriNetUnfolderBase]: 897/1680 cut-off events. [2023-11-24 21:43:53,461 INFO L125 PetriNetUnfolderBase]: For 4340/4340 co-relation queries the response was YES. [2023-11-24 21:43:53,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7738 conditions, 1680 events. 897/1680 cut-off events. For 4340/4340 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9650 event pairs, 30 based on Foata normal form. 9/1570 useless extension candidates. Maximal degree in co-relation 7476. Up to 743 conditions per place. [2023-11-24 21:43:53,486 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 168 selfloop transitions, 186 changer transitions 32/387 dead transitions. [2023-11-24 21:43:53,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 387 transitions, 3881 flow [2023-11-24 21:43:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 21:43:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-24 21:43:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 230 transitions. [2023-11-24 21:43:53,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2023-11-24 21:43:53,489 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 230 transitions. [2023-11-24 21:43:53,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 230 transitions. [2023-11-24 21:43:53,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:53,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 230 transitions. [2023-11-24 21:43:53,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 9.2) internal successors, (230), 25 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:53,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:53,496 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:53,496 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 2006 flow. Second operand 25 states and 230 transitions. [2023-11-24 21:43:53,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 387 transitions, 3881 flow [2023-11-24 21:43:53,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 387 transitions, 3772 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:53,595 INFO L231 Difference]: Finished difference. Result has 157 places, 281 transitions, 3214 flow [2023-11-24 21:43:53,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3214, PETRI_PLACES=157, PETRI_TRANSITIONS=281} [2023-11-24 21:43:53,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2023-11-24 21:43:53,598 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 281 transitions, 3214 flow [2023-11-24 21:43:53,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:53,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:53,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:53,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 21:43:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:43:53,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:43:53,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -908980295, now seen corresponding path program 5 times [2023-11-24 21:43:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093392247] [2023-11-24 21:43:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:43:54,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093392247] [2023-11-24 21:43:54,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093392247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476607458] [2023-11-24 21:43:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:43:54,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:54,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:54,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:54,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:43:54,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:43:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:54,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:43:54,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:54,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:43:54,807 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 57 treesize of output 41 [2023-11-24 21:43:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:54,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:56,035 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 33 treesize of output 29 [2023-11-24 21:43:56,046 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:56,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 41 [2023-11-24 21:43:56,072 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 87 treesize of output 77 [2023-11-24 21:43:56,123 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2023-11-24 21:43:56,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2023-11-24 21:43:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476607458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:56,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:56,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-24 21:43:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310902926] [2023-11-24 21:43:56,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:43:56,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:43:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:43:56,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:43:56,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 281 transitions, 3214 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:56,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:43:56,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:00,031 INFO L124 PetriNetUnfolderBase]: 1173/2304 cut-off events. [2023-11-24 21:44:00,031 INFO L125 PetriNetUnfolderBase]: For 9983/9983 co-relation queries the response was YES. [2023-11-24 21:44:00,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2304 events. 1173/2304 cut-off events. For 9983/9983 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15209 event pairs, 22 based on Foata normal form. 45/2240 useless extension candidates. Maximal degree in co-relation 11534. Up to 645 conditions per place. [2023-11-24 21:44:00,068 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 154 selfloop transitions, 157 changer transitions 184/496 dead transitions. [2023-11-24 21:44:00,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 496 transitions, 5812 flow [2023-11-24 21:44:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-24 21:44:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-24 21:44:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 275 transitions. [2023-11-24 21:44:00,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42242703533026116 [2023-11-24 21:44:00,071 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 275 transitions. [2023-11-24 21:44:00,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 275 transitions. [2023-11-24 21:44:00,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:00,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 275 transitions. [2023-11-24 21:44:00,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.870967741935484) internal successors, (275), 31 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,074 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,074 INFO L175 Difference]: Start difference. First operand has 157 places, 281 transitions, 3214 flow. Second operand 31 states and 275 transitions. [2023-11-24 21:44:00,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 496 transitions, 5812 flow [2023-11-24 21:44:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 496 transitions, 5657 flow, removed 52 selfloop flow, removed 10 redundant places. [2023-11-24 21:44:00,189 INFO L231 Difference]: Finished difference. Result has 186 places, 231 transitions, 2889 flow [2023-11-24 21:44:00,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2889, PETRI_PLACES=186, PETRI_TRANSITIONS=231} [2023-11-24 21:44:00,190 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 164 predicate places. [2023-11-24 21:44:00,190 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 231 transitions, 2889 flow [2023-11-24 21:44:00,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:00,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:00,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:00,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:44:00,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash 626779200, now seen corresponding path program 1 times [2023-11-24 21:44:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206671384] [2023-11-24 21:44:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:44:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:00,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206671384] [2023-11-24 21:44:00,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206671384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912810227] [2023-11-24 21:44:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:00,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:00,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:00,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:00,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:44:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:00,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:44:00,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:44:00,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:44:01,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912810227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:01,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-24 21:44:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450127243] [2023-11-24 21:44:01,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:01,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:44:01,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:44:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:44:01,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:44:01,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 231 transitions, 2889 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:01,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:01,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:44:01,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:02,040 INFO L124 PetriNetUnfolderBase]: 785/1548 cut-off events. [2023-11-24 21:44:02,041 INFO L125 PetriNetUnfolderBase]: For 10896/10896 co-relation queries the response was YES. [2023-11-24 21:44:02,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8881 conditions, 1548 events. 785/1548 cut-off events. For 10896/10896 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9309 event pairs, 152 based on Foata normal form. 16/1551 useless extension candidates. Maximal degree in co-relation 8766. Up to 783 conditions per place. [2023-11-24 21:44:02,111 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 212 selfloop transitions, 90 changer transitions 28/331 dead transitions. [2023-11-24 21:44:02,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 331 transitions, 4383 flow [2023-11-24 21:44:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:44:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:44:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2023-11-24 21:44:02,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-24 21:44:02,116 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 144 transitions. [2023-11-24 21:44:02,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 144 transitions. [2023-11-24 21:44:02,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:02,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 144 transitions. [2023-11-24 21:44:02,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:02,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:02,119 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:02,119 INFO L175 Difference]: Start difference. First operand has 186 places, 231 transitions, 2889 flow. Second operand 16 states and 144 transitions. [2023-11-24 21:44:02,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 331 transitions, 4383 flow [2023-11-24 21:44:02,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 331 transitions, 3974 flow, removed 125 selfloop flow, removed 25 redundant places. [2023-11-24 21:44:02,207 INFO L231 Difference]: Finished difference. Result has 161 places, 247 transitions, 2931 flow [2023-11-24 21:44:02,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2931, PETRI_PLACES=161, PETRI_TRANSITIONS=247} [2023-11-24 21:44:02,209 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2023-11-24 21:44:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 247 transitions, 2931 flow [2023-11-24 21:44:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:02,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:02,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:02,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:44:02,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash -683422931, now seen corresponding path program 6 times [2023-11-24 21:44:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:02,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714543045] [2023-11-24 21:44:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:02,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:44:02,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714543045] [2023-11-24 21:44:02,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714543045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349682671] [2023-11-24 21:44:02,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:44:02,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:02,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:02,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:02,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:44:02,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-24 21:44:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:02,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 21:44:02,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:03,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:44:03,143 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 115 treesize of output 109 [2023-11-24 21:44:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:44:03,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:03,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:44:03,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 63 [2023-11-24 21:44:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:44:04,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349682671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:04,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:04,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-24 21:44:04,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162727118] [2023-11-24 21:44:04,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:04,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:44:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:04,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:44:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:44:04,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:44:04,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 247 transitions, 2931 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:04,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:04,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:44:04,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:05,936 INFO L124 PetriNetUnfolderBase]: 772/1541 cut-off events. [2023-11-24 21:44:05,936 INFO L125 PetriNetUnfolderBase]: For 8543/8543 co-relation queries the response was YES. [2023-11-24 21:44:05,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8350 conditions, 1541 events. 772/1541 cut-off events. For 8543/8543 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9338 event pairs, 50 based on Foata normal form. 3/1541 useless extension candidates. Maximal degree in co-relation 8250. Up to 994 conditions per place. [2023-11-24 21:44:05,961 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 202 selfloop transitions, 106 changer transitions 5/314 dead transitions. [2023-11-24 21:44:05,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 3894 flow [2023-11-24 21:44:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:44:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:44:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2023-11-24 21:44:05,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-24 21:44:05,964 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 160 transitions. [2023-11-24 21:44:05,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 160 transitions. [2023-11-24 21:44:05,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:05,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 160 transitions. [2023-11-24 21:44:05,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.0) internal successors, (160), 16 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,966 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:05,967 INFO L175 Difference]: Start difference. First operand has 161 places, 247 transitions, 2931 flow. Second operand 16 states and 160 transitions. [2023-11-24 21:44:05,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 3894 flow [2023-11-24 21:44:06,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 314 transitions, 3839 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:06,041 INFO L231 Difference]: Finished difference. Result has 178 places, 256 transitions, 3229 flow [2023-11-24 21:44:06,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3229, PETRI_PLACES=178, PETRI_TRANSITIONS=256} [2023-11-24 21:44:06,042 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 156 predicate places. [2023-11-24 21:44:06,042 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 256 transitions, 3229 flow [2023-11-24 21:44:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:06,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:06,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:06,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09c5d15e-6d0b-45a5-bbc6-35340eba33a7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0