./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue.i --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_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:51:29,546 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:51:29,629 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:51:29,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:51:29,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:51:29,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:51:29,666 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:51:29,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:51:29,667 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:51:29,668 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:51:29,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:51:29,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:51:29,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:51:29,671 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:51:29,672 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:51:29,672 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:51:29,673 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:51:29,674 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:51:29,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:51:29,675 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:51:29,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:51:29,676 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:51:29,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:51:29,677 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:51:29,678 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:51:29,678 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:51:29,679 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:51:29,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:51:29,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:51:29,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:51:29,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:51:29,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:51:29,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:51:29,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:51:29,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:51:29,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:51:29,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:51:29,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:51:29,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:51:29,684 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:51:29,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:51:29,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:51:29,684 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_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2023-11-28 23:51:29,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:51:29,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:51:29,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:51:29,981 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:51:29,982 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:51:29,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/queue.i [2023-11-28 23:51:32,931 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:51:33,246 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:51:33,247 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i [2023-11-28 23:51:33,268 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/data/04cf70d95/5259e89072e940b0a3385d0fa3aaf394/FLAG661dce66a [2023-11-28 23:51:33,286 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/data/04cf70d95/5259e89072e940b0a3385d0fa3aaf394 [2023-11-28 23:51:33,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:51:33,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:51:33,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:51:33,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:51:33,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:51:33,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3b86a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33, skipping insertion in model container [2023-11-28 23:51:33,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,387 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:51:33,986 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_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i[43284,43297] [2023-11-28 23:51:33,996 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_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i[43491,43504] [2023-11-28 23:51:34,000 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_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i[43772,43785] [2023-11-28 23:51:34,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:51:34,021 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:51:34,079 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_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i[43284,43297] [2023-11-28 23:51:34,081 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_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i[43491,43504] [2023-11-28 23:51:34,084 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_c53220be-243e-492b-abf5-1261cf4be718/sv-benchmarks/c/pthread/queue.i[43772,43785] [2023-11-28 23:51:34,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:51:34,171 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:51:34,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34 WrapperNode [2023-11-28 23:51:34,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:51:34,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:51:34,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:51:34,174 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:51:34,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,245 INFO L138 Inliner]: procedures = 275, calls = 71, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 260 [2023-11-28 23:51:34,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:51:34,246 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:51:34,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:51:34,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:51:34,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,268 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,289 INFO L175 MemorySlicer]: Split 55 memory accesses to 7 slices as follows [2, 2, 8, 5, 2, 32, 4]. 58 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [2, 0, 8, 5, 0, 0, 0]. The 20 writes are split as follows [0, 1, 0, 0, 1, 15, 3]. [2023-11-28 23:51:34,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:51:34,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:51:34,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:51:34,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:51:34,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (1/1) ... [2023-11-28 23:51:34,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:51:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:34,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:51:34,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:51:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-28 23:51:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-28 23:51:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-28 23:51:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-28 23:51:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:51:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:51:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-28 23:51:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:51:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:51:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:51:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 23:51:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 23:51:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-28 23:51:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-28 23:51:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:51:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:51:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:51:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 23:51:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 23:51:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-28 23:51:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-28 23:51:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-28 23:51:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:51:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:51:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:51:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:51:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 23:51:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 23:51:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 23:51:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-28 23:51:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:51:34,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:51:34,409 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:51:34,613 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:51:34,616 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:51:35,027 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:51:35,455 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:51:35,455 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 23:51:35,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:35 BoogieIcfgContainer [2023-11-28 23:51:35,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:51:35,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:51:35,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:51:35,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:51:35,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:51:33" (1/3) ... [2023-11-28 23:51:35,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2984d7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:51:35, skipping insertion in model container [2023-11-28 23:51:35,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:34" (2/3) ... [2023-11-28 23:51:35,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2984d7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:51:35, skipping insertion in model container [2023-11-28 23:51:35,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:35" (3/3) ... [2023-11-28 23:51:35,466 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-11-28 23:51:35,477 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 23:51:35,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:51:35,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-28 23:51:35,491 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:51:35,573 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-28 23:51:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 47 transitions, 108 flow [2023-11-28 23:51:35,655 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2023-11-28 23:51:35,655 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 23:51:35,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 7/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-28 23:51:35,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 47 transitions, 108 flow [2023-11-28 23:51:35,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 43 transitions, 95 flow [2023-11-28 23:51:35,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:35,686 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;@7fd99b60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:35,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-28 23:51:35,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:35,692 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-28 23:51:35,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:35,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:35,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:35,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 663893, now seen corresponding path program 1 times [2023-11-28 23:51:35,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:35,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957451274] [2023-11-28 23:51:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:35,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957451274] [2023-11-28 23:51:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957451274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:35,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:35,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:51:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449067701] [2023-11-28 23:51:35,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:35,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:51:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:36,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:51:36,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:51:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:36,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 95 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:36,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:36,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:36,253 INFO L124 PetriNetUnfolderBase]: 435/786 cut-off events. [2023-11-28 23:51:36,253 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-28 23:51:36,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 786 events. 435/786 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3576 event pairs, 339 based on Foata normal form. 48/744 useless extension candidates. Maximal degree in co-relation 1440. Up to 712 conditions per place. [2023-11-28 23:51:36,264 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 31 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-11-28 23:51:36,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 147 flow [2023-11-28 23:51:36,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:51:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-28 23:51:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2023-11-28 23:51:36,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2023-11-28 23:51:36,277 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 54 transitions. [2023-11-28 23:51:36,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 54 transitions. [2023-11-28 23:51:36,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:36,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 54 transitions. [2023-11-28 23:51:36,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,287 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,290 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 95 flow. Second operand 2 states and 54 transitions. [2023-11-28 23:51:36,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 147 flow [2023-11-28 23:51:36,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:36,298 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 80 flow [2023-11-28 23:51:36,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-28 23:51:36,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-11-28 23:51:36,303 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 80 flow [2023-11-28 23:51:36,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:36,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:51:36,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:36,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash 535466999, now seen corresponding path program 1 times [2023-11-28 23:51:36,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503012315] [2023-11-28 23:51:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503012315] [2023-11-28 23:51:36,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503012315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:36,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:36,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:51:36,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971023875] [2023-11-28 23:51:36,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:36,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:36,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:36,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:36,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:36,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:36,770 INFO L124 PetriNetUnfolderBase]: 415/766 cut-off events. [2023-11-28 23:51:36,770 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-28 23:51:36,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 766 events. 415/766 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3606 event pairs, 312 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 1484. Up to 642 conditions per place. [2023-11-28 23:51:36,777 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-28 23:51:36,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 188 flow [2023-11-28 23:51:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2023-11-28 23:51:36,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2023-11-28 23:51:36,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2023-11-28 23:51:36,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2023-11-28 23:51:36,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:36,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2023-11-28 23:51:36,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,784 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 80 flow. Second operand 3 states and 73 transitions. [2023-11-28 23:51:36,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 188 flow [2023-11-28 23:51:36,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:36,787 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 82 flow [2023-11-28 23:51:36,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-28 23:51:36,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-11-28 23:51:36,789 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 82 flow [2023-11-28 23:51:36,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:36,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:36,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:36,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:51:36,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:36,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash -580390538, now seen corresponding path program 1 times [2023-11-28 23:51:36,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:36,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539877499] [2023-11-28 23:51:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:36,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:37,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:37,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539877499] [2023-11-28 23:51:37,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539877499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:37,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:37,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:51:37,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028852075] [2023-11-28 23:51:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:37,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:51:37,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:51:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:51:37,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:37,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 5 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) [2023-11-28 23:51:37,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:37,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:37,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:37,767 INFO L124 PetriNetUnfolderBase]: 690/1269 cut-off events. [2023-11-28 23:51:37,767 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-28 23:51:37,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1269 events. 690/1269 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6384 event pairs, 74 based on Foata normal form. 0/1207 useless extension candidates. Maximal degree in co-relation 2480. Up to 678 conditions per place. [2023-11-28 23:51:37,775 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 72 selfloop transitions, 10 changer transitions 3/92 dead transitions. [2023-11-28 23:51:37,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 92 transitions, 375 flow [2023-11-28 23:51:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:51:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 23:51:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2023-11-28 23:51:37,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2023-11-28 23:51:37,779 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 147 transitions. [2023-11-28 23:51:37,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 147 transitions. [2023-11-28 23:51:37,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:37,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 147 transitions. [2023-11-28 23:51:37,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.5) internal successors, (147), 6 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) [2023-11-28 23:51:37,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:37,784 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:37,784 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 6 states and 147 transitions. [2023-11-28 23:51:37,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 92 transitions, 375 flow [2023-11-28 23:51:37,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 92 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:51:37,788 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 146 flow [2023-11-28 23:51:37,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-11-28 23:51:37,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-11-28 23:51:37,789 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 146 flow [2023-11-28 23:51:37,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2023-11-28 23:51:37,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:37,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:51:37,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:37,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -497092650, now seen corresponding path program 1 times [2023-11-28 23:51:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:37,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516937053] [2023-11-28 23:51:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:37,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:37,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516937053] [2023-11-28 23:51:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516937053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:37,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:37,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:51:37,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307011462] [2023-11-28 23:51:37,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:37,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:37,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:37,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:37,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:37,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:37,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:38,109 INFO L124 PetriNetUnfolderBase]: 440/849 cut-off events. [2023-11-28 23:51:38,110 INFO L125 PetriNetUnfolderBase]: For 152/155 co-relation queries the response was YES. [2023-11-28 23:51:38,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 849 events. 440/849 cut-off events. For 152/155 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3789 event pairs, 226 based on Foata normal form. 30/854 useless extension candidates. Maximal degree in co-relation 1746. Up to 436 conditions per place. [2023-11-28 23:51:38,115 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 37 selfloop transitions, 4 changer transitions 4/51 dead transitions. [2023-11-28 23:51:38,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 221 flow [2023-11-28 23:51:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2023-11-28 23:51:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-11-28 23:51:38,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2023-11-28 23:51:38,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2023-11-28 23:51:38,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:38,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2023-11-28 23:51:38,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,121 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 146 flow. Second operand 3 states and 75 transitions. [2023-11-28 23:51:38,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 221 flow [2023-11-28 23:51:38,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:38,124 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 108 flow [2023-11-28 23:51:38,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-11-28 23:51:38,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-28 23:51:38,126 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 108 flow [2023-11-28 23:51:38,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:38,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:38,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:51:38,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:38,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:38,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1625196355, now seen corresponding path program 1 times [2023-11-28 23:51:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:38,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055362230] [2023-11-28 23:51:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:38,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:38,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:38,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055362230] [2023-11-28 23:51:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055362230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:38,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:51:38,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564859010] [2023-11-28 23:51:38,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:38,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:38,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:38,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:38,440 INFO L124 PetriNetUnfolderBase]: 265/580 cut-off events. [2023-11-28 23:51:38,441 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-28 23:51:38,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 580 events. 265/580 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2355 event pairs, 91 based on Foata normal form. 32/601 useless extension candidates. Maximal degree in co-relation 1191. Up to 266 conditions per place. [2023-11-28 23:51:38,446 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 35 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-28 23:51:38,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 215 flow [2023-11-28 23:51:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-28 23:51:38,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2023-11-28 23:51:38,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-28 23:51:38,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-28 23:51:38,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:38,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-28 23:51:38,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,451 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 108 flow. Second operand 3 states and 72 transitions. [2023-11-28 23:51:38,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 215 flow [2023-11-28 23:51:38,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 205 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-28 23:51:38,455 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 110 flow [2023-11-28 23:51:38,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-28 23:51:38,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-11-28 23:51:38,456 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 110 flow [2023-11-28 23:51:38,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:38,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:38,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:51:38,457 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:38,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash -876403870, now seen corresponding path program 1 times [2023-11-28 23:51:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:38,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581978875] [2023-11-28 23:51:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:39,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:39,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581978875] [2023-11-28 23:51:39,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581978875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:39,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:51:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039108429] [2023-11-28 23:51:39,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:51:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:51:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:51:39,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:39,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 110 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:39,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:39,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:39,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:40,625 INFO L124 PetriNetUnfolderBase]: 384/832 cut-off events. [2023-11-28 23:51:40,625 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-28 23:51:40,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 832 events. 384/832 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4057 event pairs, 90 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1812. Up to 288 conditions per place. [2023-11-28 23:51:40,632 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 66 selfloop transitions, 14 changer transitions 12/98 dead transitions. [2023-11-28 23:51:40,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 98 transitions, 475 flow [2023-11-28 23:51:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:51:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 23:51:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2023-11-28 23:51:40,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302600472813239 [2023-11-28 23:51:40,635 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 182 transitions. [2023-11-28 23:51:40,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 182 transitions. [2023-11-28 23:51:40,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:40,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 182 transitions. [2023-11-28 23:51:40,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,639 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,639 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 110 flow. Second operand 9 states and 182 transitions. [2023-11-28 23:51:40,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 98 transitions, 475 flow [2023-11-28 23:51:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 98 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:40,645 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 202 flow [2023-11-28 23:51:40,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-28 23:51:40,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-11-28 23:51:40,646 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 202 flow [2023-11-28 23:51:40,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:40,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:40,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:40,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:51:40,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:40,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1142107678, now seen corresponding path program 2 times [2023-11-28 23:51:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:40,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476596645] [2023-11-28 23:51:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:40,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:42,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:42,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476596645] [2023-11-28 23:51:42,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476596645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:42,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:42,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:51:42,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423020633] [2023-11-28 23:51:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:51:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:51:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:51:42,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:42,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:42,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:42,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:42,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:42,779 INFO L124 PetriNetUnfolderBase]: 501/1098 cut-off events. [2023-11-28 23:51:42,779 INFO L125 PetriNetUnfolderBase]: For 868/869 co-relation queries the response was YES. [2023-11-28 23:51:42,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1098 events. 501/1098 cut-off events. For 868/869 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6171 event pairs, 156 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 2850. Up to 661 conditions per place. [2023-11-28 23:51:42,790 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 70 selfloop transitions, 15 changer transitions 6/97 dead transitions. [2023-11-28 23:51:42,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 580 flow [2023-11-28 23:51:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:51:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 23:51:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2023-11-28 23:51:42,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40189125295508277 [2023-11-28 23:51:42,800 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 170 transitions. [2023-11-28 23:51:42,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 170 transitions. [2023-11-28 23:51:42,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:42,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 170 transitions. [2023-11-28 23:51:42,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:42,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:42,804 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:42,804 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 202 flow. Second operand 9 states and 170 transitions. [2023-11-28 23:51:42,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 580 flow [2023-11-28 23:51:42,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 562 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:42,811 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 347 flow [2023-11-28 23:51:42,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-11-28 23:51:42,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2023-11-28 23:51:42,813 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 347 flow [2023-11-28 23:51:42,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:42,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:42,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:42,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:51:42,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:42,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:42,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1515695148, now seen corresponding path program 3 times [2023-11-28 23:51:42,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399108830] [2023-11-28 23:51:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:42,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:44,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:44,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399108830] [2023-11-28 23:51:44,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399108830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:44,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:44,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:51:44,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032662816] [2023-11-28 23:51:44,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:51:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:51:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:51:44,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:44,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 347 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:44,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:44,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:44,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:45,102 INFO L124 PetriNetUnfolderBase]: 628/1390 cut-off events. [2023-11-28 23:51:45,102 INFO L125 PetriNetUnfolderBase]: For 1741/1741 co-relation queries the response was YES. [2023-11-28 23:51:45,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 1390 events. 628/1390 cut-off events. For 1741/1741 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8099 event pairs, 52 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3841. Up to 338 conditions per place. [2023-11-28 23:51:45,118 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 92 selfloop transitions, 32 changer transitions 9/139 dead transitions. [2023-11-28 23:51:45,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 139 transitions, 911 flow [2023-11-28 23:51:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:51:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 23:51:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2023-11-28 23:51:45,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41843971631205673 [2023-11-28 23:51:45,121 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 236 transitions. [2023-11-28 23:51:45,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 236 transitions. [2023-11-28 23:51:45,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:45,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 236 transitions. [2023-11-28 23:51:45,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.666666666666668) internal successors, (236), 12 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:45,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:45,125 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:45,125 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 347 flow. Second operand 12 states and 236 transitions. [2023-11-28 23:51:45,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 139 transitions, 911 flow [2023-11-28 23:51:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 139 transitions, 865 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:45,140 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 480 flow [2023-11-28 23:51:45,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=480, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-11-28 23:51:45,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2023-11-28 23:51:45,141 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 480 flow [2023-11-28 23:51:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:45,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:45,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:45,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:51:45,143 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1082497026, now seen corresponding path program 4 times [2023-11-28 23:51:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021435743] [2023-11-28 23:51:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021435743] [2023-11-28 23:51:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021435743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:46,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:51:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334534305] [2023-11-28 23:51:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:46,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:51:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:46,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:51:46,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:51:46,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:46,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 480 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:46,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:46,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:46,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:47,460 INFO L124 PetriNetUnfolderBase]: 722/1591 cut-off events. [2023-11-28 23:51:47,460 INFO L125 PetriNetUnfolderBase]: For 2995/2995 co-relation queries the response was YES. [2023-11-28 23:51:47,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 1591 events. 722/1591 cut-off events. For 2995/2995 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9822 event pairs, 182 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 4750. Up to 707 conditions per place. [2023-11-28 23:51:47,481 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 89 selfloop transitions, 23 changer transitions 12/130 dead transitions. [2023-11-28 23:51:47,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 130 transitions, 983 flow [2023-11-28 23:51:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:51:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 23:51:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2023-11-28 23:51:47,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373522458628842 [2023-11-28 23:51:47,484 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 185 transitions. [2023-11-28 23:51:47,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 185 transitions. [2023-11-28 23:51:47,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:47,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 185 transitions. [2023-11-28 23:51:47,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:47,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:47,487 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:47,488 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 480 flow. Second operand 9 states and 185 transitions. [2023-11-28 23:51:47,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 130 transitions, 983 flow [2023-11-28 23:51:47,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 914 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:47,507 INFO L231 Difference]: Finished difference. Result has 91 places, 82 transitions, 625 flow [2023-11-28 23:51:47,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=625, PETRI_PLACES=91, PETRI_TRANSITIONS=82} [2023-11-28 23:51:47,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2023-11-28 23:51:47,509 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 82 transitions, 625 flow [2023-11-28 23:51:47,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:47,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:47,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:47,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:51:47,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:47,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:47,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1858211244, now seen corresponding path program 5 times [2023-11-28 23:51:47,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:47,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037659605] [2023-11-28 23:51:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:47,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:48,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037659605] [2023-11-28 23:51:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037659605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:48,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:48,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:51:48,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940922276] [2023-11-28 23:51:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:48,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:51:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:51:48,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:51:48,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-28 23:51:48,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 82 transitions, 625 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:48,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:48,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-28 23:51:48,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:49,466 INFO L124 PetriNetUnfolderBase]: 778/1695 cut-off events. [2023-11-28 23:51:49,467 INFO L125 PetriNetUnfolderBase]: For 3809/3809 co-relation queries the response was YES. [2023-11-28 23:51:49,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5271 conditions, 1695 events. 778/1695 cut-off events. For 3809/3809 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10509 event pairs, 164 based on Foata normal form. 0/1673 useless extension candidates. Maximal degree in co-relation 5241. Up to 727 conditions per place. [2023-11-28 23:51:49,484 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 91 selfloop transitions, 29 changer transitions 9/135 dead transitions. [2023-11-28 23:51:49,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 1093 flow [2023-11-28 23:51:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:51:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 23:51:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2023-11-28 23:51:49,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127659574468085 [2023-11-28 23:51:49,486 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 194 transitions. [2023-11-28 23:51:49,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 194 transitions. [2023-11-28 23:51:49,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:49,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 194 transitions. [2023-11-28 23:51:49,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:49,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:49,489 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:49,489 INFO L175 Difference]: Start difference. First operand has 91 places, 82 transitions, 625 flow. Second operand 10 states and 194 transitions. [2023-11-28 23:51:49,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 1093 flow [2023-11-28 23:51:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 135 transitions, 1012 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-11-28 23:51:49,507 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 682 flow [2023-11-28 23:51:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=682, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2023-11-28 23:51:49,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2023-11-28 23:51:49,508 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 682 flow [2023-11-28 23:51:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 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) [2023-11-28 23:51:49,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:49,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:49,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:51:49,509 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:51:49,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash -122252151, now seen corresponding path program 1 times [2023-11-28 23:51:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409320933] [2023-11-28 23:51:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409320933] [2023-11-28 23:51:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409320933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35737827] [2023-11-28 23:51:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:50,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:50,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:50,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:51:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:51,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-28 23:51:51,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:51:51,204 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 16 treesize of output 15 [2023-11-28 23:51:51,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 131 [2023-11-28 23:51:51,441 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 11 treesize of output 7 [2023-11-28 23:51:51,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2023-11-28 23:51:52,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 54 [2023-11-28 23:51:52,932 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 [2023-11-28 23:51:52,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:51:52,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 51 [2023-11-28 23:51:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:52,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:51:53,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:51:53,371 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-28 23:51:53,394 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-28 23:51:53,394 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-28 23:52:00,498 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 20 treesize of output 18 [2023-11-28 23:52:00,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 114 treesize of output 102 [2023-11-28 23:52:00,559 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 13 [2023-11-28 23:52:00,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 18 [2023-11-28 23:52:00,575 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 20 treesize of output 18 [2023-11-28 23:52:00,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 114 treesize of output 102 [2023-11-28 23:52:00,655 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 13 [2023-11-28 23:52:00,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 18 [2023-11-28 23:52:00,672 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 20 treesize of output 18 [2023-11-28 23:52:00,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-11-28 23:52:00,727 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 20 treesize of output 18 [2023-11-28 23:52:00,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-11-28 23:52:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:04,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35737827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:52:04,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:52:04,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-28 23:52:04,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781427043] [2023-11-28 23:52:04,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:52:04,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:52:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:52:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=722, Unknown=1, NotChecked=0, Total=870 [2023-11-28 23:52:10,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:52:14,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:52:14,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-28 23:52:14,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 86 transitions, 682 flow. Second operand has 30 states, 30 states have (on average 9.566666666666666) internal successors, (287), 30 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:14,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:14,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-28 23:52:14,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:20,003 INFO L124 PetriNetUnfolderBase]: 1541/2874 cut-off events. [2023-11-28 23:52:20,003 INFO L125 PetriNetUnfolderBase]: For 5641/5641 co-relation queries the response was YES. [2023-11-28 23:52:20,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8838 conditions, 2874 events. 1541/2874 cut-off events. For 5641/5641 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16832 event pairs, 507 based on Foata normal form. 10/2874 useless extension candidates. Maximal degree in co-relation 8806. Up to 2035 conditions per place. [2023-11-28 23:52:20,033 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 136 selfloop transitions, 32 changer transitions 6/177 dead transitions. [2023-11-28 23:52:20,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 177 transitions, 1349 flow [2023-11-28 23:52:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:52:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-28 23:52:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 239 transitions. [2023-11-28 23:52:20,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33900709219858155 [2023-11-28 23:52:20,036 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 239 transitions. [2023-11-28 23:52:20,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 239 transitions. [2023-11-28 23:52:20,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:20,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 239 transitions. [2023-11-28 23:52:20,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 47.0) internal successors, (752), 16 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,039 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 47.0) internal successors, (752), 16 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,039 INFO L175 Difference]: Start difference. First operand has 100 places, 86 transitions, 682 flow. Second operand 15 states and 239 transitions. [2023-11-28 23:52:20,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 177 transitions, 1349 flow [2023-11-28 23:52:20,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 177 transitions, 1275 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-28 23:52:20,058 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 837 flow [2023-11-28 23:52:20,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=837, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2023-11-28 23:52:20,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2023-11-28 23:52:20,059 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 837 flow [2023-11-28 23:52:20,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.566666666666666) internal successors, (287), 30 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:20,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:20,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:52:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:20,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:52:20,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1570366219, now seen corresponding path program 2 times [2023-11-28 23:52:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:20,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926270259] [2023-11-28 23:52:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:21,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926270259] [2023-11-28 23:52:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926270259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058982311] [2023-11-28 23:52:21,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:52:21,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:21,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:21,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:21,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:52:22,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:52:22,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:52:22,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-28 23:52:22,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:22,125 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 16 treesize of output 15 [2023-11-28 23:52:22,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 107 [2023-11-28 23:52:22,201 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 8 treesize of output 1 [2023-11-28 23:52:22,249 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 11 treesize of output 7 [2023-11-28 23:52:22,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 54 [2023-11-28 23:52:22,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2023-11-28 23:52:23,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:52:23,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2023-11-28 23:52:23,554 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 67 treesize of output 57 [2023-11-28 23:52:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:23,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:23,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:52:23,937 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-28 23:52:23,972 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-28 23:52:23,972 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-28 23:52:29,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:52:29,333 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-28 23:52:29,355 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-28 23:52:29,356 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-28 23:52:31,608 INFO L349 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2023-11-28 23:52:31,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2023-11-28 23:52:31,647 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-28 23:52:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058982311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:52:32,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:52:32,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-28 23:52:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612221091] [2023-11-28 23:52:32,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:52:32,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:52:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:52:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=714, Unknown=1, NotChecked=0, Total=870 [2023-11-28 23:52:36,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:52:40,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:52:40,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-28 23:52:40,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 837 flow. Second operand has 30 states, 30 states have (on average 9.566666666666666) internal successors, (287), 30 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:40,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:40,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-28 23:52:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:46,908 INFO L124 PetriNetUnfolderBase]: 2283/4253 cut-off events. [2023-11-28 23:52:46,909 INFO L125 PetriNetUnfolderBase]: For 11128/11128 co-relation queries the response was YES. [2023-11-28 23:52:46,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14293 conditions, 4253 events. 2283/4253 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 25226 event pairs, 466 based on Foata normal form. 10/4242 useless extension candidates. Maximal degree in co-relation 14254. Up to 1711 conditions per place. [2023-11-28 23:52:46,951 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 205 selfloop transitions, 50 changer transitions 8/266 dead transitions. [2023-11-28 23:52:46,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 266 transitions, 2147 flow [2023-11-28 23:52:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 23:52:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-28 23:52:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 336 transitions. [2023-11-28 23:52:46,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762597984322508 [2023-11-28 23:52:46,955 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 336 transitions. [2023-11-28 23:52:46,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 336 transitions. [2023-11-28 23:52:46,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:46,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 336 transitions. [2023-11-28 23:52:46,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 17.68421052631579) internal successors, (336), 19 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:46,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 47.0) internal successors, (940), 20 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:46,960 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 47.0) internal successors, (940), 20 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:46,960 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 837 flow. Second operand 19 states and 336 transitions. [2023-11-28 23:52:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 266 transitions, 2147 flow [2023-11-28 23:52:47,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 266 transitions, 2080 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-28 23:52:47,028 INFO L231 Difference]: Finished difference. Result has 135 places, 128 transitions, 1199 flow [2023-11-28 23:52:47,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1199, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2023-11-28 23:52:47,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2023-11-28 23:52:47,029 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 1199 flow [2023-11-28 23:52:47,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.566666666666666) internal successors, (287), 30 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:47,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:47,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:47,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:52:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 23:52:47,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:52:47,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:47,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1142428375, now seen corresponding path program 3 times [2023-11-28 23:52:47,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:47,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206168761] [2023-11-28 23:52:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:47,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206168761] [2023-11-28 23:52:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206168761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167579177] [2023-11-28 23:52:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:52:48,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:48,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:48,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:52:48,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 23:52:48,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:52:48,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-28 23:52:48,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:48,712 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 16 treesize of output 15 [2023-11-28 23:52:48,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 107 [2023-11-28 23:52:48,790 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 8 treesize of output 1 [2023-11-28 23:52:48,833 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 11 treesize of output 7 [2023-11-28 23:52:49,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 54 [2023-11-28 23:52:49,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2023-11-28 23:52:50,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:52:50,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2023-11-28 23:52:50,056 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 67 treesize of output 57 [2023-11-28 23:52:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:50,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:50,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:52:50,389 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-28 23:52:50,412 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-28 23:52:50,413 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-28 23:52:54,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:52:54,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 35 [2023-11-28 23:52:54,278 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-28 23:52:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:55,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167579177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:52:55,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:52:55,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2023-11-28 23:52:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472807243] [2023-11-28 23:52:55,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:52:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 23:52:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 23:52:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2023-11-28 23:52:56,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 47 [2023-11-28 23:52:56,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 1199 flow. Second operand has 31 states, 31 states have (on average 10.387096774193548) internal successors, (322), 31 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:56,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:56,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 47 [2023-11-28 23:52:56,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:53:06,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:53:24,735 INFO L124 PetriNetUnfolderBase]: 3666/7364 cut-off events. [2023-11-28 23:53:24,735 INFO L125 PetriNetUnfolderBase]: For 42997/42997 co-relation queries the response was YES. [2023-11-28 23:53:24,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29604 conditions, 7364 events. 3666/7364 cut-off events. For 42997/42997 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 54566 event pairs, 250 based on Foata normal form. 40/7348 useless extension candidates. Maximal degree in co-relation 29555. Up to 1128 conditions per place. [2023-11-28 23:53:24,810 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 306 selfloop transitions, 182 changer transitions 58/550 dead transitions. [2023-11-28 23:53:24,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 550 transitions, 5325 flow [2023-11-28 23:53:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-28 23:53:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-28 23:53:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 782 transitions. [2023-11-28 23:53:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3617021276595745 [2023-11-28 23:53:24,819 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 782 transitions. [2023-11-28 23:53:24,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 782 transitions. [2023-11-28 23:53:24,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:53:24,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 782 transitions. [2023-11-28 23:53:24,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 17.0) internal successors, (782), 46 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:24,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 47.0) internal successors, (2209), 47 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:24,830 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 47.0) internal successors, (2209), 47 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:24,830 INFO L175 Difference]: Start difference. First operand has 135 places, 128 transitions, 1199 flow. Second operand 46 states and 782 transitions. [2023-11-28 23:53:24,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 550 transitions, 5325 flow [2023-11-28 23:53:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 550 transitions, 5055 flow, removed 114 selfloop flow, removed 7 redundant places. [2023-11-28 23:53:24,964 INFO L231 Difference]: Finished difference. Result has 196 places, 255 transitions, 3296 flow [2023-11-28 23:53:24,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3296, PETRI_PLACES=196, PETRI_TRANSITIONS=255} [2023-11-28 23:53:24,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2023-11-28 23:53:24,965 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 255 transitions, 3296 flow [2023-11-28 23:53:24,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 10.387096774193548) internal successors, (322), 31 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:24,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:53:24,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:53:24,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:53:25,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:53:25,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:53:25,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:53:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash -848667945, now seen corresponding path program 4 times [2023-11-28 23:53:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:53:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292442234] [2023-11-28 23:53:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:53:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:53:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:53:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:26,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:53:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292442234] [2023-11-28 23:53:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292442234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:53:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433223494] [2023-11-28 23:53:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:53:26,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:53:26,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:53:26,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:53:26,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:53:26,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:53:26,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:53:26,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-28 23:53:26,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:53:26,384 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 16 treesize of output 15 [2023-11-28 23:53:26,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 131 [2023-11-28 23:53:26,539 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 11 treesize of output 7 [2023-11-28 23:53:26,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 103 [2023-11-28 23:53:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:53:26,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2023-11-28 23:53:26,769 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 8 treesize of output 1 [2023-11-28 23:53:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:53:27,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:53:27,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 37 [2023-11-28 23:53:27,299 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 59 treesize of output 45 [2023-11-28 23:53:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:27,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:53:33,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:53:33,706 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-28 23:53:33,746 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-28 23:53:33,746 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-28 23:53:35,360 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 19 treesize of output 17 [2023-11-28 23:53:35,381 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 19 treesize of output 17 [2023-11-28 23:53:35,406 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 19 treesize of output 17 [2023-11-28 23:53:35,433 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 19 treesize of output 17 [2023-11-28 23:53:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:37,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433223494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:53:37,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:53:37,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-28 23:53:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875616599] [2023-11-28 23:53:37,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:53:37,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:53:37,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:53:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:53:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=714, Unknown=1, NotChecked=0, Total=870 [2023-11-28 23:53:38,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2023-11-28 23:53:38,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 255 transitions, 3296 flow. Second operand has 30 states, 30 states have (on average 11.266666666666667) internal successors, (338), 30 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:38,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:53:38,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2023-11-28 23:53:38,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:53:45,130 INFO L124 PetriNetUnfolderBase]: 1412/3262 cut-off events. [2023-11-28 23:53:45,130 INFO L125 PetriNetUnfolderBase]: For 37503/37505 co-relation queries the response was YES. [2023-11-28 23:53:45,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15496 conditions, 3262 events. 1412/3262 cut-off events. For 37503/37505 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 23167 event pairs, 184 based on Foata normal form. 152/3390 useless extension candidates. Maximal degree in co-relation 15424. Up to 732 conditions per place. [2023-11-28 23:53:45,164 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 180 selfloop transitions, 112 changer transitions 21/318 dead transitions. [2023-11-28 23:53:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 318 transitions, 3974 flow [2023-11-28 23:53:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 23:53:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-28 23:53:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 399 transitions. [2023-11-28 23:53:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3537234042553192 [2023-11-28 23:53:45,167 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 399 transitions. [2023-11-28 23:53:45,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 399 transitions. [2023-11-28 23:53:45,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:53:45,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 399 transitions. [2023-11-28 23:53:45,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 16.625) internal successors, (399), 24 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:45,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 47.0) internal successors, (1175), 25 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:45,170 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 47.0) internal successors, (1175), 25 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:45,171 INFO L175 Difference]: Start difference. First operand has 196 places, 255 transitions, 3296 flow. Second operand 24 states and 399 transitions. [2023-11-28 23:53:45,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 318 transitions, 3974 flow [2023-11-28 23:53:45,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 318 transitions, 3132 flow, removed 338 selfloop flow, removed 32 redundant places. [2023-11-28 23:53:45,298 INFO L231 Difference]: Finished difference. Result has 172 places, 196 transitions, 2233 flow [2023-11-28 23:53:45,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2233, PETRI_PLACES=172, PETRI_TRANSITIONS=196} [2023-11-28 23:53:45,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2023-11-28 23:53:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 196 transitions, 2233 flow [2023-11-28 23:53:45,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.266666666666667) internal successors, (338), 30 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:45,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:53:45,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:53:45,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:53:45,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:53:45,502 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:53:45,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:53:45,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1121503823, now seen corresponding path program 5 times [2023-11-28 23:53:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:53:45,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538050974] [2023-11-28 23:53:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:53:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:53:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:53:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:53:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538050974] [2023-11-28 23:53:46,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538050974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:53:46,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221021346] [2023-11-28 23:53:46,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:53:46,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:53:46,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:53:46,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:53:46,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:53:46,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:53:46,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:53:46,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-28 23:53:46,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:53:46,771 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 16 treesize of output 15 [2023-11-28 23:53:46,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 131 [2023-11-28 23:53:46,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 16 [2023-11-28 23:53:46,913 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 11 treesize of output 7 [2023-11-28 23:53:47,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2023-11-28 23:53:47,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 54 [2023-11-28 23:53:47,979 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 [2023-11-28 23:53:47,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:53:47,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 51 [2023-11-28 23:53:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:48,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:53:48,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:53:48,308 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-28 23:53:48,341 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-28 23:53:48,342 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-28 23:53:55,004 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 20 treesize of output 18 [2023-11-28 23:53:55,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-11-28 23:53:55,090 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 20 treesize of output 18 [2023-11-28 23:53:55,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-11-28 23:53:55,177 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 20 treesize of output 18 [2023-11-28 23:53:55,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-11-28 23:53:55,259 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 13 [2023-11-28 23:53:55,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 18 [2023-11-28 23:53:55,276 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 20 treesize of output 18 [2023-11-28 23:53:55,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-11-28 23:53:55,373 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 13 [2023-11-28 23:53:55,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 18 [2023-11-28 23:53:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221021346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:53:57,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:53:57,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-28 23:53:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875918757] [2023-11-28 23:53:57,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:53:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:53:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:53:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:53:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=711, Unknown=1, NotChecked=0, Total=870 [2023-11-28 23:54:01,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:54:06,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:54:10,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:54:10,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-28 23:54:10,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 196 transitions, 2233 flow. Second operand has 30 states, 30 states have (on average 9.566666666666666) internal successors, (287), 30 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:10,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:54:10,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-28 23:54:10,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:54:14,787 INFO L124 PetriNetUnfolderBase]: 2482/4880 cut-off events. [2023-11-28 23:54:14,787 INFO L125 PetriNetUnfolderBase]: For 26746/26746 co-relation queries the response was YES. [2023-11-28 23:54:14,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19417 conditions, 4880 events. 2482/4880 cut-off events. For 26746/26746 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 31965 event pairs, 594 based on Foata normal form. 0/4851 useless extension candidates. Maximal degree in co-relation 19357. Up to 3241 conditions per place. [2023-11-28 23:54:14,835 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 232 selfloop transitions, 43 changer transitions 13/291 dead transitions. [2023-11-28 23:54:14,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 3386 flow [2023-11-28 23:54:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 23:54:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-28 23:54:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 238 transitions. [2023-11-28 23:54:14,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3617021276595745 [2023-11-28 23:54:14,838 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 238 transitions. [2023-11-28 23:54:14,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 238 transitions. [2023-11-28 23:54:14,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:54:14,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 238 transitions. [2023-11-28 23:54:14,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:14,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 47.0) internal successors, (705), 15 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:14,841 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 47.0) internal successors, (705), 15 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:14,841 INFO L175 Difference]: Start difference. First operand has 172 places, 196 transitions, 2233 flow. Second operand 14 states and 238 transitions. [2023-11-28 23:54:14,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 3386 flow [2023-11-28 23:54:15,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 291 transitions, 3076 flow, removed 113 selfloop flow, removed 15 redundant places. [2023-11-28 23:54:15,060 INFO L231 Difference]: Finished difference. Result has 172 places, 207 transitions, 2270 flow [2023-11-28 23:54:15,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2270, PETRI_PLACES=172, PETRI_TRANSITIONS=207} [2023-11-28 23:54:15,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2023-11-28 23:54:15,061 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 207 transitions, 2270 flow [2023-11-28 23:54:15,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.566666666666666) internal successors, (287), 30 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:15,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:54:15,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:54:15,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:54:15,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:54:15,262 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:54:15,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:54:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1683353902, now seen corresponding path program 1 times [2023-11-28 23:54:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:54:15,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024638757] [2023-11-28 23:54:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:54:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:54:15,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:54:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:54:15,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:54:15,372 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:54:15,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-28 23:54:15,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-28 23:54:15,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-28 23:54:15,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-28 23:54:15,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-28 23:54:15,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-28 23:54:15,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-28 23:54:15,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 23:54:15,377 INFO L445 BasicCegarLoop]: Path program histogram: [5, 5, 1, 1, 1, 1, 1, 1] [2023-11-28 23:54:15,384 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-28 23:54:15,384 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 23:54:15,423 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre65 could not be translated [2023-11-28 23:54:15,427 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre67 could not be translated [2023-11-28 23:54:15,430 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet56 could not be translated [2023-11-28 23:54:15,430 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret57 could not be translated [2023-11-28 23:54:15,431 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem62 could not be translated [2023-11-28 23:54:15,431 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret61 could not be translated [2023-11-28 23:54:15,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:54:15 BasicIcfg [2023-11-28 23:54:15,445 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 23:54:15,446 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 23:54:15,446 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 23:54:15,446 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 23:54:15,447 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:35" (3/4) ... [2023-11-28 23:54:15,448 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-28 23:54:15,482 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre65 could not be translated [2023-11-28 23:54:15,483 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre67 could not be translated [2023-11-28 23:54:15,486 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet56 could not be translated [2023-11-28 23:54:15,486 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret57 could not be translated [2023-11-28 23:54:15,487 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem62 could not be translated [2023-11-28 23:54:15,487 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret61 could not be translated [2023-11-28 23:54:15,533 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-28 23:54:15,534 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 23:54:15,534 INFO L158 Benchmark]: Toolchain (without parser) took 162243.45ms. Allocated memory was 253.8MB in the beginning and 641.7MB in the end (delta: 388.0MB). Free memory was 210.8MB in the beginning and 388.3MB in the end (delta: -177.4MB). Peak memory consumption was 212.4MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,535 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 86.2MB in the beginning and 86.0MB in the end (delta: 134.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 23:54:15,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 879.43ms. Allocated memory is still 253.8MB. Free memory was 210.8MB in the beginning and 179.4MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.78ms. Allocated memory is still 253.8MB. Free memory was 179.4MB in the beginning and 177.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,536 INFO L158 Benchmark]: Boogie Preprocessor took 76.62ms. Allocated memory is still 253.8MB. Free memory was 177.1MB in the beginning and 173.1MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,536 INFO L158 Benchmark]: RCFGBuilder took 1132.64ms. Allocated memory is still 253.8MB. Free memory was 173.1MB in the beginning and 196.9MB in the end (delta: -23.8MB). Peak memory consumption was 72.5MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,537 INFO L158 Benchmark]: TraceAbstraction took 159986.16ms. Allocated memory was 253.8MB in the beginning and 641.7MB in the end (delta: 388.0MB). Free memory was 195.8MB in the beginning and 399.8MB in the end (delta: -204.0MB). Peak memory consumption was 184.0MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,537 INFO L158 Benchmark]: Witness Printer took 88.13ms. Allocated memory is still 641.7MB. Free memory was 399.8MB in the beginning and 388.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 23:54:15,539 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 86.2MB in the beginning and 86.0MB in the end (delta: 134.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 879.43ms. Allocated memory is still 253.8MB. Free memory was 210.8MB in the beginning and 179.4MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.78ms. Allocated memory is still 253.8MB. Free memory was 179.4MB in the beginning and 177.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.62ms. Allocated memory is still 253.8MB. Free memory was 177.1MB in the beginning and 173.1MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1132.64ms. Allocated memory is still 253.8MB. Free memory was 173.1MB in the beginning and 196.9MB in the end (delta: -23.8MB). Peak memory consumption was 72.5MB. Max. memory is 16.1GB. * TraceAbstraction took 159986.16ms. Allocated memory was 253.8MB in the beginning and 641.7MB in the end (delta: 388.0MB). Free memory was 195.8MB in the beginning and 399.8MB in the end (delta: -204.0MB). Peak memory consumption was 184.0MB. Max. memory is 16.1GB. * Witness Printer took 88.13ms. Allocated memory is still 641.7MB. Free memory was 399.8MB in the beginning and 388.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre65 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre67 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet56 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret57 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem62 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret61 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre65 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre67 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet56 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret57 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem62 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret61 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1043]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L947] 0 pthread_mutex_t m; [L947] 0 pthread_mutex_t m; [L947] 0 pthread_mutex_t m; [L947] 0 pthread_mutex_t m; [L947] 0 pthread_mutex_t m; [L947] 0 pthread_mutex_t m; [L949] 0 int stored_elements[(20)]; [L949] 0 int stored_elements[(20)]; [L950] 0 _Bool enqueue_flag, dequeue_flag; [L951] 0 QType queue; [L951] 0 QType queue; [L1054] 0 pthread_t id1, id2; [L1055] 0 enqueue_flag=(1) [L1056] 0 dequeue_flag=(0) [L1057] CALL 0 init(&queue) [L954] 0 q->head=0 [L955] 0 q->tail=0 [L956] 0 q->amount=0 [L1057] RET 0 init(&queue) [L1058] CALL, EXPR 0 empty(&queue) [L960] EXPR 0 q->head [L960] EXPR 0 q->tail [L960] COND TRUE 0 q->head == q->tail [L963] 0 return (-1); [L1058] RET, EXPR 0 empty(&queue) [L1058] COND FALSE 0 !(!empty(&queue)==(-1)) [L1063] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, &queue) VAL [dequeue_flag=0, enqueue_flag=1, id1={9:0}, id2={10:0}, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1007] 1 int value, i; VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1064] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, &queue) VAL [dequeue_flag=0, enqueue_flag=1, id1={9:0}, id2={10:0}, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1036] 2 int i; [L1037] 2 i=0 VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, i=0, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1037] COND TRUE 2 i<(20) VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, i=0, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1009] 1 value = __VERIFIER_nondet_int() [L1010] CALL 1 enqueue(&queue,value) [L980] EXPR 1 q->tail [L980] 1 q->element[q->tail] = x [L981] EXPR 1 q->amount [L981] 1 q->amount++ [L981] 1 q->amount++ [L982] EXPR 1 q->tail [L982] COND FALSE 1 !(q->tail == (20)) [L988] EXPR 1 q->tail [L988] 1 q->tail++ [L988] 1 q->tail++ [L990] 1 return 0; [L1010] RET 1 enqueue(&queue,value) [L1010] COND FALSE 1 !(enqueue(&queue,value)) [L1013] 1 stored_elements[0]=value [L1014] CALL 1 empty(&queue) [L960] EXPR 1 q->head [L960] EXPR 1 q->tail [L960] COND FALSE 1 !(q->head == q->tail) [L966] 1 return 0; [L1014] RET 1 empty(&queue) [L1014] COND FALSE 1 !(empty(&queue)) [L1040] COND FALSE 2 !(\read(dequeue_flag)) VAL [dequeue_flag=0, enqueue_flag=1, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1037] 2 i++ VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, i=1, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1037] COND TRUE 2 i<(20) VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, i=1, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1018] 1 i=0 VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, i=0, m={3:0}, queue={5:0}, stored_elements={4:0}, value=0] [L1018] COND TRUE 1 i<((20)-1) VAL [arg={5:0}, arg={5:0}, dequeue_flag=0, enqueue_flag=1, i=0, m={3:0}, queue={5:0}, stored_elements={4:0}, value=0] [L1021] COND TRUE 1 \read(enqueue_flag) [L1023] 1 value = __VERIFIER_nondet_int() [L1024] CALL 1 enqueue(&queue,value) [L980] EXPR 1 q->tail [L980] 1 q->element[q->tail] = x [L981] EXPR 1 q->amount [L981] 1 q->amount++ [L981] 1 q->amount++ [L982] EXPR 1 q->tail [L982] COND FALSE 1 !(q->tail == (20)) [L988] EXPR 1 q->tail [L988] 1 q->tail++ [L988] 1 q->tail++ [L990] 1 return 0; [L1024] RET 1 enqueue(&queue,value) [L1025] 1 stored_elements[i+1]=value [L1026] 1 enqueue_flag=(0) [L1027] 1 dequeue_flag=(1) VAL [arg={5:0}, arg={5:0}, dequeue_flag=1, enqueue_flag=0, i=0, m={3:0}, queue={5:0}, stored_elements={4:0}, value=1] [L1040] COND TRUE 2 \read(dequeue_flag) [L1042] CALL, EXPR 2 dequeue(&queue) [L994] 2 int x; [L995] EXPR 2 q->head [L995] EXPR 2 q->element[q->head] [L995] 2 x = q->element[q->head] [L996] EXPR 2 q->amount [L996] 2 q->amount-- [L996] 2 q->amount-- [L997] EXPR 2 q->head [L997] COND FALSE 2 !(q->head == (20)) [L1002] EXPR 2 q->head [L1002] 2 q->head++ [L1002] 2 q->head++ [L1003] 2 return x; [L1042] RET, EXPR 2 dequeue(&queue) [L1042] EXPR 2 stored_elements[i] VAL [arg={5:0}, arg={5:0}, dequeue_flag=1, enqueue_flag=0, i=1, m={3:0}, queue={5:0}, stored_elements={4:0}] [L1042] COND TRUE 2 !dequeue(&queue)==stored_elements[i] [L1043] 2 reach_error() VAL [arg={5:0}, arg={5:0}, dequeue_flag=1, enqueue_flag=0, i=1, m={3:0}, queue={5:0}, stored_elements={4:0}] - UnprovableResult [Line: 1059]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 71 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 159.8s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 89.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 1956 SdHoareTripleChecker+Valid, 65.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1914 mSDsluCounter, 1311 SdHoareTripleChecker+Invalid, 63.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1273 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10756 IncrementalHoareTripleChecker+Invalid, 10898 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 38 mSDtfsCounter, 10756 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 466 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 46.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3296occurred in iteration=13, InterpolantAutomatonStates: 184, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 66.8s InterpolantComputationTime, 478 NumberOfCodeBlocks, 478 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 564 ConstructedInterpolants, 111 QuantifiedInterpolants, 77458 SizeOfPredicates, 212 NumberOfNonLiveVariables, 1480 ConjunctsInSsa, 269 ConjunctsInUnsatCore, 25 InterpolantComputations, 10 PerfectInterpolantSequences, 0/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-28 23:54:15,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c53220be-243e-492b-abf5-1261cf4be718/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE