./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:03:12,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:03:12,261 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:03:12,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:03:12,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:03:12,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:03:12,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:03:12,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:03:12,327 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:03:12,332 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:03:12,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:03:12,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:03:12,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:03:12,336 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:03:12,336 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:03:12,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:03:12,348 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:03:12,349 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:03:12,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:03:12,350 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:03:12,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:03:12,351 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:03:12,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:03:12,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:03:12,352 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:03:12,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:03:12,353 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:03:12,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:03:12,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:03:12,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:03:12,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:03:12,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:12,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:03:12,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:03:12,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:03:12,358 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:03:12,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:03:12,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:03:12,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:03:12,359 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:03:12,359 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:03:12,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:03:12,360 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_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2023-11-24 22:03:12,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:03:12,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:03:12,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:03:12,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:03:12,762 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:03:12,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-24 22:03:15,790 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:03:16,149 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:03:16,149 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-24 22:03:16,182 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/data/8019ddf51/dea06b0b592841449ce8e77f35a16645/FLAG4bd8e7f05 [2023-11-24 22:03:16,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/data/8019ddf51/dea06b0b592841449ce8e77f35a16645 [2023-11-24 22:03:16,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:03:16,202 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:03:16,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:16,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:03:16,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:03:16,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:16" (1/1) ... [2023-11-24 22:03:16,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2425edb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:16, skipping insertion in model container [2023-11-24 22:03:16,214 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:16" (1/1) ... [2023-11-24 22:03:16,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:03:16,907 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_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2023-11-24 22:03:16,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:16,968 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:03:17,028 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_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2023-11-24 22:03:17,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:17,147 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:03:17,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17 WrapperNode [2023-11-24 22:03:17,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:17,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:17,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:03:17,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:03:17,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,209 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2023-11-24 22:03:17,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:17,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:03:17,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:03:17,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:03:17,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,242 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,302 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 2, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 1, 2]. [2023-11-24 22:03:17,303 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,303 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,329 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,332 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:03:17,343 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:03:17,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:03:17,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:03:17,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (1/1) ... [2023-11-24 22:03:17,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:17,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:03:17,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:03:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 22:03:17,446 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 22:03:17,447 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 22:03:17,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 22:03:17,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:03:17,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:03:17,448 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 22:03:17,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:03:17,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:03:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:03:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:03:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:03:17,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:03:17,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:03:17,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:03:17,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:03:17,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:03:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 22:03:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:03:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:03:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:03:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:03:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:03:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:03:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:03:17,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:03:17,458 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:03:17,663 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:03:17,668 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:03:17,970 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:03:18,308 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:03:18,308 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 22:03:18,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:18 BoogieIcfgContainer [2023-11-24 22:03:18,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:03:18,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:03:18,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:03:18,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:03:18,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:03:16" (1/3) ... [2023-11-24 22:03:18,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28da7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:18, skipping insertion in model container [2023-11-24 22:03:18,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:17" (2/3) ... [2023-11-24 22:03:18,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28da7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:18, skipping insertion in model container [2023-11-24 22:03:18,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:18" (3/3) ... [2023-11-24 22:03:18,322 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-11-24 22:03:18,331 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 22:03:18,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:03:18,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 22:03:18,344 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:03:18,429 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 22:03:18,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2023-11-24 22:03:18,517 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2023-11-24 22:03:18,517 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:03:18,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2023-11-24 22:03:18,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2023-11-24 22:03:18,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2023-11-24 22:03:18,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:03:18,582 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;@5ccdc219, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:03:18,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 22:03:18,627 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:03:18,627 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-24 22:03:18,627 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:03:18,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:18,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:18,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:18,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2023-11-24 22:03:18,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:18,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923910734] [2023-11-24 22:03:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:19,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923910734] [2023-11-24 22:03:19,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923910734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:19,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:19,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:19,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446893226] [2023-11-24 22:03:19,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:19,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-24 22:03:19,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:19,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:19,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-24 22:03:19,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:19,537 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2023-11-24 22:03:19,538 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 22:03:19,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2742 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2023-11-24 22:03:19,547 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2023-11-24 22:03:19,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2023-11-24 22:03:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:03:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-24 22:03:19,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-24 22:03:19,564 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-24 22:03:19,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-24 22:03:19,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:19,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-24 22:03:19,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:19,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:19,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:19,575 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2023-11-24 22:03:19,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2023-11-24 22:03:19,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:03:19,582 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2023-11-24 22:03:19,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-24 22:03:19,588 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-11-24 22:03:19,588 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2023-11-24 22:03:19,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:19,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:19,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:19,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:03:19,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:19,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:19,590 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2023-11-24 22:03:19,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:19,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010753523] [2023-11-24 22:03:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:19,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:19,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010753523] [2023-11-24 22:03:19,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010753523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815293688] [2023-11-24 22:03:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:19,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:19,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:19,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:19,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:03:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:03:20,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:20,116 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 [2023-11-24 22:03:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:20,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815293688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:20,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:20,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-24 22:03:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818234347] [2023-11-24 22:03:20,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:20,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 22:03:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:20,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 22:03:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:03:20,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-24 22:03:20,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:20,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:20,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-24 22:03:20,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:21,142 INFO L124 PetriNetUnfolderBase]: 1316/2465 cut-off events. [2023-11-24 22:03:21,143 INFO L125 PetriNetUnfolderBase]: For 306/308 co-relation queries the response was YES. [2023-11-24 22:03:21,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 2465 events. 1316/2465 cut-off events. For 306/308 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13438 event pairs, 164 based on Foata normal form. 52/2411 useless extension candidates. Maximal degree in co-relation 4582. Up to 383 conditions per place. [2023-11-24 22:03:21,163 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 168 selfloop transitions, 32 changer transitions 6/211 dead transitions. [2023-11-24 22:03:21,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2023-11-24 22:03:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 22:03:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-24 22:03:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2023-11-24 22:03:21,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-24 22:03:21,168 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 320 transitions. [2023-11-24 22:03:21,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 320 transitions. [2023-11-24 22:03:21,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:21,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 320 transitions. [2023-11-24 22:03:21,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 21.333333333333332) internal successors, (320), 15 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,176 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,176 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2023-11-24 22:03:21,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2023-11-24 22:03:21,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 211 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:03:21,183 INFO L231 Difference]: Finished difference. Result has 55 places, 67 transitions, 331 flow [2023-11-24 22:03:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=331, PETRI_PLACES=55, PETRI_TRANSITIONS=67} [2023-11-24 22:03:21,184 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2023-11-24 22:03:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 67 transitions, 331 flow [2023-11-24 22:03:21,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:21,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:21,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:21,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:21,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2023-11-24 22:03:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:21,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968635596] [2023-11-24 22:03:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:21,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:21,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968635596] [2023-11-24 22:03:21,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968635596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:21,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:21,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:21,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187779192] [2023-11-24 22:03:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:21,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-24 22:03:21,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:21,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-24 22:03:21,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:21,820 INFO L124 PetriNetUnfolderBase]: 716/1463 cut-off events. [2023-11-24 22:03:21,820 INFO L125 PetriNetUnfolderBase]: For 615/615 co-relation queries the response was YES. [2023-11-24 22:03:21,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 1463 events. 716/1463 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7625 event pairs, 252 based on Foata normal form. 66/1512 useless extension candidates. Maximal degree in co-relation 3127. Up to 664 conditions per place. [2023-11-24 22:03:21,833 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 45 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-24 22:03:21,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 347 flow [2023-11-24 22:03:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:03:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-24 22:03:21,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-24 22:03:21,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-24 22:03:21,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-24 22:03:21,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:21,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-24 22:03:21,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,836 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 331 flow. Second operand 3 states and 60 transitions. [2023-11-24 22:03:21,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 347 flow [2023-11-24 22:03:21,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 315 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-24 22:03:21,847 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 200 flow [2023-11-24 22:03:21,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-24 22:03:21,848 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-24 22:03:21,848 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 200 flow [2023-11-24 22:03:21,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:21,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:21,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:21,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:03:21,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2023-11-24 22:03:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105467968] [2023-11-24 22:03:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:21,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:22,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:22,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105467968] [2023-11-24 22:03:22,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105467968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:22,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:22,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:22,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780656294] [2023-11-24 22:03:22,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:22,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:03:22,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:03:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:22,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-24 22:03:22,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:22,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-24 22:03:22,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:22,840 INFO L124 PetriNetUnfolderBase]: 894/1823 cut-off events. [2023-11-24 22:03:22,840 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-24 22:03:22,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1823 events. 894/1823 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9841 event pairs, 294 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 3739. Up to 1052 conditions per place. [2023-11-24 22:03:22,855 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 59 selfloop transitions, 7 changer transitions 8/86 dead transitions. [2023-11-24 22:03:22,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 454 flow [2023-11-24 22:03:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:03:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:03:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2023-11-24 22:03:22,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-24 22:03:22,860 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2023-11-24 22:03:22,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2023-11-24 22:03:22,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:22,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2023-11-24 22:03:22,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,865 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,865 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 200 flow. Second operand 5 states and 100 transitions. [2023-11-24 22:03:22,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 454 flow [2023-11-24 22:03:22,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:03:22,878 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 253 flow [2023-11-24 22:03:22,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-24 22:03:22,880 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-24 22:03:22,880 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 253 flow [2023-11-24 22:03:22,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:22,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:22,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:22,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:03:22,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:22,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1957737570, now seen corresponding path program 1 times [2023-11-24 22:03:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128372595] [2023-11-24 22:03:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:23,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:23,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128372595] [2023-11-24 22:03:23,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128372595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:23,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292800599] [2023-11-24 22:03:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:23,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:23,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:23,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:03:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:03:23,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:23,813 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 18 treesize of output 14 [2023-11-24 22:03:24,049 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 80 treesize of output 32 [2023-11-24 22:03:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:24,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:24,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292800599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:24,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:24,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-24 22:03:24,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071746391] [2023-11-24 22:03:24,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:03:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:03:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:03:24,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-24 22:03:24,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:24,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-24 22:03:24,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:24,682 INFO L124 PetriNetUnfolderBase]: 1068/2117 cut-off events. [2023-11-24 22:03:24,683 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2023-11-24 22:03:24,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 2117 events. 1068/2117 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11646 event pairs, 547 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 4216. Up to 1170 conditions per place. [2023-11-24 22:03:24,702 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 53 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2023-11-24 22:03:24,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 530 flow [2023-11-24 22:03:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:03:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 22:03:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2023-11-24 22:03:24,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-24 22:03:24,704 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 97 transitions. [2023-11-24 22:03:24,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 97 transitions. [2023-11-24 22:03:24,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:24,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 97 transitions. [2023-11-24 22:03:24,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,707 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 253 flow. Second operand 6 states and 97 transitions. [2023-11-24 22:03:24,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 530 flow [2023-11-24 22:03:24,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 522 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-24 22:03:24,714 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 386 flow [2023-11-24 22:03:24,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-11-24 22:03:24,716 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2023-11-24 22:03:24,716 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 386 flow [2023-11-24 22:03:24,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:24,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:24,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:24,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:24,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:24,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:24,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash 742439305, now seen corresponding path program 1 times [2023-11-24 22:03:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:24,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095968074] [2023-11-24 22:03:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095968074] [2023-11-24 22:03:25,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095968074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:25,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019758600] [2023-11-24 22:03:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:25,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:25,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:25,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:25,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:03:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:25,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:03:25,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:25,524 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 [2023-11-24 22:03:25,613 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 [2023-11-24 22:03:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:25,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:26,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019758600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:26,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:26,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2023-11-24 22:03:26,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686521856] [2023-11-24 22:03:26,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:26,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 22:03:26,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 22:03:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:03:26,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-24 22:03:26,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:26,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:26,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-24 22:03:26,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:27,396 INFO L124 PetriNetUnfolderBase]: 1896/3753 cut-off events. [2023-11-24 22:03:27,396 INFO L125 PetriNetUnfolderBase]: For 2992/2992 co-relation queries the response was YES. [2023-11-24 22:03:27,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 3753 events. 1896/3753 cut-off events. For 2992/2992 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 22008 event pairs, 281 based on Foata normal form. 52/3787 useless extension candidates. Maximal degree in co-relation 8260. Up to 561 conditions per place. [2023-11-24 22:03:27,435 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 180 selfloop transitions, 61 changer transitions 18/264 dead transitions. [2023-11-24 22:03:27,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 264 transitions, 1572 flow [2023-11-24 22:03:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 22:03:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 22:03:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 362 transitions. [2023-11-24 22:03:27,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544360902255639 [2023-11-24 22:03:27,439 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 362 transitions. [2023-11-24 22:03:27,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 362 transitions. [2023-11-24 22:03:27,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:27,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 362 transitions. [2023-11-24 22:03:27,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 19.05263157894737) internal successors, (362), 19 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:27,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:27,445 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:27,445 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 386 flow. Second operand 19 states and 362 transitions. [2023-11-24 22:03:27,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 264 transitions, 1572 flow [2023-11-24 22:03:27,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 264 transitions, 1497 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-24 22:03:27,467 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 737 flow [2023-11-24 22:03:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=737, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2023-11-24 22:03:27,472 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-11-24 22:03:27,472 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 737 flow [2023-11-24 22:03:27,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:27,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:27,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:27,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 22:03:27,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:27,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2023-11-24 22:03:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:27,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767217462] [2023-11-24 22:03:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:29,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:29,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767217462] [2023-11-24 22:03:29,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767217462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:29,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792224362] [2023-11-24 22:03:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:29,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:29,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:29,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:29,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:03:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 22:03:29,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:29,402 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 23 treesize of output 1 [2023-11-24 22:03:29,532 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 50 treesize of output 19 [2023-11-24 22:03:29,795 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 56 treesize of output 32 [2023-11-24 22:03:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:29,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792224362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:30,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:30,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-24 22:03:30,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198799503] [2023-11-24 22:03:30,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:30,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 22:03:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 22:03:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-24 22:03:30,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-24 22:03:30,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 737 flow. Second operand has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:30,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:30,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-24 22:03:30,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:36,061 INFO L124 PetriNetUnfolderBase]: 3241/6396 cut-off events. [2023-11-24 22:03:36,062 INFO L125 PetriNetUnfolderBase]: For 7282/7282 co-relation queries the response was YES. [2023-11-24 22:03:36,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15916 conditions, 6396 events. 3241/6396 cut-off events. For 7282/7282 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 39798 event pairs, 467 based on Foata normal form. 0/6386 useless extension candidates. Maximal degree in co-relation 14919. Up to 972 conditions per place. [2023-11-24 22:03:36,129 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 281 selfloop transitions, 102 changer transitions 69/457 dead transitions. [2023-11-24 22:03:36,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 457 transitions, 2894 flow [2023-11-24 22:03:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-24 22:03:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-24 22:03:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 659 transitions. [2023-11-24 22:03:36,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49548872180451126 [2023-11-24 22:03:36,135 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 659 transitions. [2023-11-24 22:03:36,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 659 transitions. [2023-11-24 22:03:36,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:36,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 659 transitions. [2023-11-24 22:03:36,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 17.342105263157894) internal successors, (659), 38 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:36,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:36,143 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:36,143 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 737 flow. Second operand 38 states and 659 transitions. [2023-11-24 22:03:36,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 457 transitions, 2894 flow [2023-11-24 22:03:36,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 457 transitions, 2731 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-11-24 22:03:36,181 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1340 flow [2023-11-24 22:03:36,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1340, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2023-11-24 22:03:36,182 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2023-11-24 22:03:36,182 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1340 flow [2023-11-24 22:03:36,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:36,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:36,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-24 22:03:36,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:36,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:36,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:36,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:36,390 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2023-11-24 22:03:36,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:36,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580570924] [2023-11-24 22:03:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:36,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:36,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580570924] [2023-11-24 22:03:36,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580570924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:36,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677072819] [2023-11-24 22:03:36,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:36,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:36,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:36,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:36,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:03:37,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:03:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:37,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 22:03:37,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:37,179 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 [2023-11-24 22:03:37,255 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 [2023-11-24 22:03:37,351 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 [2023-11-24 22:03:37,445 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 [2023-11-24 22:03:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:37,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:37,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677072819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:37,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:37,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-11-24 22:03:37,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046919240] [2023-11-24 22:03:37,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:37,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-24 22:03:37,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-24 22:03:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2023-11-24 22:03:37,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-24 22:03:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1340 flow. Second operand has 28 states, 28 states have (on average 9.785714285714286) internal successors, (274), 28 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:37,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:37,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-24 22:03:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:03:43,424 INFO L124 PetriNetUnfolderBase]: 9954/19432 cut-off events. [2023-11-24 22:03:43,424 INFO L125 PetriNetUnfolderBase]: For 30534/30534 co-relation queries the response was YES. [2023-11-24 22:03:43,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 19432 events. 9954/19432 cut-off events. For 30534/30534 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 137696 event pairs, 1975 based on Foata normal form. 178/19608 useless extension candidates. Maximal degree in co-relation 48843. Up to 2949 conditions per place. [2023-11-24 22:03:43,602 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 591 selfloop transitions, 357 changer transitions 36/989 dead transitions. [2023-11-24 22:03:43,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 989 transitions, 7633 flow [2023-11-24 22:03:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-24 22:03:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-24 22:03:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1101 transitions. [2023-11-24 22:03:43,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2023-11-24 22:03:43,612 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 1101 transitions. [2023-11-24 22:03:43,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 1101 transitions. [2023-11-24 22:03:43,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:03:43,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 1101 transitions. [2023-11-24 22:03:43,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 18.35) internal successors, (1101), 60 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 35.0) internal successors, (2135), 61 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,635 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 35.0) internal successors, (2135), 61 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,635 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1340 flow. Second operand 60 states and 1101 transitions. [2023-11-24 22:03:43,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 989 transitions, 7633 flow [2023-11-24 22:03:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 989 transitions, 7282 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-11-24 22:03:43,852 INFO L231 Difference]: Finished difference. Result has 192 places, 425 transitions, 4542 flow [2023-11-24 22:03:43,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4542, PETRI_PLACES=192, PETRI_TRANSITIONS=425} [2023-11-24 22:03:43,856 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 159 predicate places. [2023-11-24 22:03:43,857 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 425 transitions, 4542 flow [2023-11-24 22:03:43,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.785714285714286) internal successors, (274), 28 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:43,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:03:43,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:43,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:44,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 22:03:44,064 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:03:44,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2023-11-24 22:03:44,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040402357] [2023-11-24 22:03:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040402357] [2023-11-24 22:03:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040402357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139964216] [2023-11-24 22:03:45,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:45,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:45,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:45,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:45,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de3bc5a-0eaa-4c37-b2e6-b40bb485f304/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:03:46,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:03:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:46,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-24 22:03:46,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:46,103 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 23 treesize of output 1 [2023-11-24 22:03:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:03:46,477 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 46 treesize of output 18 [2023-11-24 22:03:46,929 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 48 treesize of output 19 [2023-11-24 22:03:47,736 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 80 treesize of output 32 [2023-11-24 22:03:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:47,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139964216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:49,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2023-11-24 22:03:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752299792] [2023-11-24 22:03:49,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 22:03:49,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 22:03:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:03:49,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-24 22:03:49,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 425 transitions, 4542 flow. Second operand has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:49,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:03:49,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-24 22:03:49,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand