./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC --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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:25:33,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:25:33,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 00:25:33,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:25:33,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:25:33,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:25:33,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:25:33,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:25:33,801 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:25:33,801 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:25:33,802 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:25:33,802 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:25:33,802 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:25:33,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:25:33,802 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:25:33,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:25:33,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 00:25:33,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:25:33,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:25:33,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:25:33,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:25:33,804 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:25:33,805 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:25:33,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:25:33,805 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:25:33,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:25:33,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:25:33,805 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:25:33,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:25:33,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 00:25:33,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:25:33,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:25:33,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:25:33,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:25:33,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:25:33,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:25:33,807 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC 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 -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-24 00:25:34,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:25:34,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:25:34,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:25:34,120 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:25:34,121 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:25:34,122 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-24 00:25:37,452 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/data/9a56cab3c/477ce92020944dfb94cfa8a27c34dbed/FLAGa221aafb3 [2024-11-24 00:25:37,813 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:25:37,814 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-24 00:25:37,825 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/data/9a56cab3c/477ce92020944dfb94cfa8a27c34dbed/FLAGa221aafb3 [2024-11-24 00:25:37,847 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/data/9a56cab3c/477ce92020944dfb94cfa8a27c34dbed [2024-11-24 00:25:37,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:25:37,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:25:37,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:25:37,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:25:37,861 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:25:37,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:25:37" (1/1) ... [2024-11-24 00:25:37,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a44f1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:37, skipping insertion in model container [2024-11-24 00:25:37,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:25:37" (1/1) ... [2024-11-24 00:25:37,883 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:25:38,062 WARN L250 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_3bd00226-db99-479d-b9e1-f447bb32c17e/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2024-11-24 00:25:38,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:25:38,080 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:25:38,102 WARN L250 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_3bd00226-db99-479d-b9e1-f447bb32c17e/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2024-11-24 00:25:38,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:25:38,123 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:25:38,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38 WrapperNode [2024-11-24 00:25:38,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:25:38,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:25:38,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:25:38,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:25:38,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,164 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 136 [2024-11-24 00:25:38,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:25:38,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:25:38,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:25:38,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:25:38,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,177 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,195 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-24 00:25:38,195 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,204 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,211 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:25:38,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:25:38,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:25:38,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:25:38,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (1/1) ... [2024-11-24 00:25:38,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:25:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:25:38,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:25:38,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:25:38,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:25:38,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 00:25:38,297 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 00:25:38,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 00:25:38,297 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 00:25:38,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:25:38,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 00:25:38,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:25:38,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:25:38,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 00:25:38,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 00:25:38,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:25:38,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:25:38,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:25:38,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:25:38,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:25:38,301 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 00:25:38,413 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:25:38,415 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:25:38,708 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 00:25:38,709 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:25:38,999 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:25:38,999 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-24 00:25:38,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:25:38 BoogieIcfgContainer [2024-11-24 00:25:39,000 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:25:39,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:25:39,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:25:39,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:25:39,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:25:37" (1/3) ... [2024-11-24 00:25:39,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ef2310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:25:39, skipping insertion in model container [2024-11-24 00:25:39,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:25:38" (2/3) ... [2024-11-24 00:25:39,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ef2310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:25:39, skipping insertion in model container [2024-11-24 00:25:39,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:25:38" (3/3) ... [2024-11-24 00:25:39,012 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-24 00:25:39,031 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:25:39,033 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-24 00:25:39,034 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 00:25:39,124 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 00:25:39,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 32 transitions, 78 flow [2024-11-24 00:25:39,207 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-11-24 00:25:39,209 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 00:25:39,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 6/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-24 00:25:39,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 32 transitions, 78 flow [2024-11-24 00:25:39,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 70 flow [2024-11-24 00:25:39,229 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:25:39,250 INFO L333 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, 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;@375bfb70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:25:39,254 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-24 00:25:39,273 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 00:25:39,277 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-24 00:25:39,277 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 00:25:39,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:39,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:39,278 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:39,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:39,286 INFO L85 PathProgramCache]: Analyzing trace with hash -617684965, now seen corresponding path program 1 times [2024-11-24 00:25:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762673615] [2024-11-24 00:25:39,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:39,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:39,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762673615] [2024-11-24 00:25:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762673615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:39,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:25:39,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120749647] [2024-11-24 00:25:39,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:39,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 00:25:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:39,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 00:25:39,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 00:25:39,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:39,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:39,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:39,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:39,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:39,784 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2024-11-24 00:25:39,785 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-24 00:25:39,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 290 events. 158/290 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1057 event pairs, 116 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 513. Up to 253 conditions per place. [2024-11-24 00:25:39,792 INFO L140 encePairwiseOnDemand]: 30/32 looper letters, 22 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2024-11-24 00:25:39,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 110 flow [2024-11-24 00:25:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 00:25:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-24 00:25:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 38 transitions. [2024-11-24 00:25:39,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-24 00:25:39,817 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 70 flow. Second operand 2 states and 38 transitions. [2024-11-24 00:25:39,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 110 flow [2024-11-24 00:25:39,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:25:39,829 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 58 flow [2024-11-24 00:25:39,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-11-24 00:25:39,837 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-11-24 00:25:39,840 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 58 flow [2024-11-24 00:25:39,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:39,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:39,840 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:39,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:25:39,841 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:39,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1959108445, now seen corresponding path program 1 times [2024-11-24 00:25:39,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:39,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769287211] [2024-11-24 00:25:39,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769287211] [2024-11-24 00:25:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769287211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:40,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:25:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979203497] [2024-11-24 00:25:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:40,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:25:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:40,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:25:40,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:25:40,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:40,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:40,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:40,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:40,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:40,372 INFO L124 PetriNetUnfolderBase]: 256/457 cut-off events. [2024-11-24 00:25:40,372 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 00:25:40,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 457 events. 256/457 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1849 event pairs, 96 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 893. Up to 228 conditions per place. [2024-11-24 00:25:40,376 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 34 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2024-11-24 00:25:40,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 44 transitions, 173 flow [2024-11-24 00:25:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:25:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:25:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-24 00:25:40,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-24 00:25:40,378 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 3 states and 61 transitions. [2024-11-24 00:25:40,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 44 transitions, 173 flow [2024-11-24 00:25:40,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 00:25:40,381 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 70 flow [2024-11-24 00:25:40,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-11-24 00:25:40,382 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-24 00:25:40,382 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 70 flow [2024-11-24 00:25:40,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:40,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:40,384 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:40,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:25:40,385 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:40,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:40,385 INFO L85 PathProgramCache]: Analyzing trace with hash -233138863, now seen corresponding path program 1 times [2024-11-24 00:25:40,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642187487] [2024-11-24 00:25:40,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642187487] [2024-11-24 00:25:40,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642187487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:40,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:40,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:25:40,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532192101] [2024-11-24 00:25:40,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:40,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:25:40,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:40,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:25:40,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:25:40,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:40,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:40,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:40,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:40,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:40,705 INFO L124 PetriNetUnfolderBase]: 287/534 cut-off events. [2024-11-24 00:25:40,705 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-24 00:25:40,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 534 events. 287/534 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2138 event pairs, 126 based on Foata normal form. 14/459 useless extension candidates. Maximal degree in co-relation 1051. Up to 318 conditions per place. [2024-11-24 00:25:40,709 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 27 selfloop transitions, 3 changer transitions 6/41 dead transitions. [2024-11-24 00:25:40,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-11-24 00:25:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:25:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:25:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-11-24 00:25:40,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-24 00:25:40,711 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 70 flow. Second operand 3 states and 57 transitions. [2024-11-24 00:25:40,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-11-24 00:25:40,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:25:40,713 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 87 flow [2024-11-24 00:25:40,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-24 00:25:40,714 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-11-24 00:25:40,714 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 87 flow [2024-11-24 00:25:40,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:40,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:40,715 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:40,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:25:40,715 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:40,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash 256584377, now seen corresponding path program 1 times [2024-11-24 00:25:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:40,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409502295] [2024-11-24 00:25:40,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:40,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:41,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:41,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409502295] [2024-11-24 00:25:41,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409502295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:41,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:41,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:25:41,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663168545] [2024-11-24 00:25:41,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:41,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:25:41,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:41,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:25:41,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:25:41,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:41,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:41,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:41,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:41,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:41,219 INFO L124 PetriNetUnfolderBase]: 355/668 cut-off events. [2024-11-24 00:25:41,219 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-24 00:25:41,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 668 events. 355/668 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2922 event pairs, 289 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 1416. Up to 480 conditions per place. [2024-11-24 00:25:41,225 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 2 changer transitions 15/46 dead transitions. [2024-11-24 00:25:41,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 205 flow [2024-11-24 00:25:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:25:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:25:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-24 00:25:41,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-11-24 00:25:41,229 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 87 flow. Second operand 4 states and 67 transitions. [2024-11-24 00:25:41,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 205 flow [2024-11-24 00:25:41,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:25:41,232 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2024-11-24 00:25:41,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-24 00:25:41,235 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-11-24 00:25:41,235 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2024-11-24 00:25:41,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:41,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:41,237 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:41,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 00:25:41,238 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:41,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2011685032, now seen corresponding path program 1 times [2024-11-24 00:25:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223735948] [2024-11-24 00:25:41,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:41,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223735948] [2024-11-24 00:25:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223735948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:25:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794784493] [2024-11-24 00:25:42,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:25:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:25:42,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:25:42,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:25:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:42,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 00:25:43,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:25:43,126 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 [2024-11-24 00:25:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:43,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:25:44,644 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 61 treesize of output 55 [2024-11-24 00:25:44,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:25:44,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-24 00:25:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:44,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794784493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:25:44,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:25:44,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-24 00:25:44,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320105136] [2024-11-24 00:25:44,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:25:44,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 00:25:44,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:44,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 00:25:44,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-11-24 00:25:44,898 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:44,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:44,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:44,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:44,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:47,375 INFO L124 PetriNetUnfolderBase]: 1572/2998 cut-off events. [2024-11-24 00:25:47,376 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2024-11-24 00:25:47,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6375 conditions, 2998 events. 1572/2998 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 18280 event pairs, 340 based on Foata normal form. 32/2694 useless extension candidates. Maximal degree in co-relation 6367. Up to 532 conditions per place. [2024-11-24 00:25:47,392 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 163 selfloop transitions, 43 changer transitions 68/279 dead transitions. [2024-11-24 00:25:47,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 279 transitions, 1310 flow [2024-11-24 00:25:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-24 00:25:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-24 00:25:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 455 transitions. [2024-11-24 00:25:47,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-11-24 00:25:47,398 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 25 states and 455 transitions. [2024-11-24 00:25:47,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 279 transitions, 1310 flow [2024-11-24 00:25:47,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 279 transitions, 1276 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-11-24 00:25:47,415 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 465 flow [2024-11-24 00:25:47,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=465, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-11-24 00:25:47,416 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-11-24 00:25:47,417 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 465 flow [2024-11-24 00:25:47,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:47,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:47,417 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:47,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:25:47,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:25:47,622 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:47,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1484320632, now seen corresponding path program 1 times [2024-11-24 00:25:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:47,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602354513] [2024-11-24 00:25:47,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:25:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602354513] [2024-11-24 00:25:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602354513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:25:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368209207] [2024-11-24 00:25:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:47,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:25:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:47,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:25:47,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:25:47,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-11-24 00:25:47,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 465 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:47,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:47,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-11-24 00:25:47,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:48,195 INFO L124 PetriNetUnfolderBase]: 1593/2829 cut-off events. [2024-11-24 00:25:48,195 INFO L125 PetriNetUnfolderBase]: For 4526/4526 co-relation queries the response was YES. [2024-11-24 00:25:48,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7569 conditions, 2829 events. 1593/2829 cut-off events. For 4526/4526 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 15744 event pairs, 878 based on Foata normal form. 44/2674 useless extension candidates. Maximal degree in co-relation 7547. Up to 2027 conditions per place. [2024-11-24 00:25:48,214 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 72 selfloop transitions, 2 changer transitions 3/80 dead transitions. [2024-11-24 00:25:48,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 602 flow [2024-11-24 00:25:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:25:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:25:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-11-24 00:25:48,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-24 00:25:48,216 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 465 flow. Second operand 3 states and 54 transitions. [2024-11-24 00:25:48,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 602 flow [2024-11-24 00:25:48,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 536 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-11-24 00:25:48,257 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 303 flow [2024-11-24 00:25:48,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-11-24 00:25:48,258 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-11-24 00:25:48,258 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 303 flow [2024-11-24 00:25:48,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:48,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:48,259 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:48,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-24 00:25:48,259 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:48,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash -566382587, now seen corresponding path program 2 times [2024-11-24 00:25:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:48,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805798367] [2024-11-24 00:25:48,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:25:48,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:48,304 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:25:48,305 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:25:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:25:48,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805798367] [2024-11-24 00:25:48,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805798367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:48,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:48,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:25:48,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650719777] [2024-11-24 00:25:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:48,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:25:48,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:48,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:25:48,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:25:48,486 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:48,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:48,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:48,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:48,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:48,921 INFO L124 PetriNetUnfolderBase]: 1439/2669 cut-off events. [2024-11-24 00:25:48,921 INFO L125 PetriNetUnfolderBase]: For 3230/3230 co-relation queries the response was YES. [2024-11-24 00:25:48,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7053 conditions, 2669 events. 1439/2669 cut-off events. For 3230/3230 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15453 event pairs, 391 based on Foata normal form. 1/2485 useless extension candidates. Maximal degree in co-relation 7035. Up to 685 conditions per place. [2024-11-24 00:25:48,937 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 73 selfloop transitions, 12 changer transitions 10/101 dead transitions. [2024-11-24 00:25:48,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 101 transitions, 644 flow [2024-11-24 00:25:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:25:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:25:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-24 00:25:48,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-11-24 00:25:48,941 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 303 flow. Second operand 5 states and 98 transitions. [2024-11-24 00:25:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 101 transitions, 644 flow [2024-11-24 00:25:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 642 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:25:48,971 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 351 flow [2024-11-24 00:25:48,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-11-24 00:25:48,973 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-11-24 00:25:48,974 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 351 flow [2024-11-24 00:25:48,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:48,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:48,974 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:48,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 00:25:48,976 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:48,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash 854734617, now seen corresponding path program 3 times [2024-11-24 00:25:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:48,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689064447] [2024-11-24 00:25:48,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:25:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:49,020 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:25:49,021 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:25:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:25:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689064447] [2024-11-24 00:25:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689064447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:25:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103743463] [2024-11-24 00:25:49,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:25:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:25:49,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:25:49,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:25:49,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:25:49,226 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:25:49,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:25:49,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:25:49,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:25:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:25:49,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:25:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:25:49,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103743463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:25:49,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:25:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-24 00:25:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824122267] [2024-11-24 00:25:49,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:25:49,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:25:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:49,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:25:49,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:25:49,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:49,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:49,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:49,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:49,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:50,153 INFO L124 PetriNetUnfolderBase]: 2481/4721 cut-off events. [2024-11-24 00:25:50,153 INFO L125 PetriNetUnfolderBase]: For 7783/7783 co-relation queries the response was YES. [2024-11-24 00:25:50,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12901 conditions, 4721 events. 2481/4721 cut-off events. For 7783/7783 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 30253 event pairs, 939 based on Foata normal form. 50/4474 useless extension candidates. Maximal degree in co-relation 12882. Up to 1772 conditions per place. [2024-11-24 00:25:50,181 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 77 selfloop transitions, 24 changer transitions 0/107 dead transitions. [2024-11-24 00:25:50,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 809 flow [2024-11-24 00:25:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:25:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:25:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-24 00:25:50,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-24 00:25:50,182 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 351 flow. Second operand 4 states and 80 transitions. [2024-11-24 00:25:50,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 809 flow [2024-11-24 00:25:50,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 107 transitions, 769 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-24 00:25:50,214 INFO L231 Difference]: Finished difference. Result has 67 places, 82 transitions, 604 flow [2024-11-24 00:25:50,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=604, PETRI_PLACES=67, PETRI_TRANSITIONS=82} [2024-11-24 00:25:50,217 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-11-24 00:25:50,217 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 82 transitions, 604 flow [2024-11-24 00:25:50,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:50,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:50,218 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:50,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:25:50,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-24 00:25:50,418 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:50,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1388083365, now seen corresponding path program 4 times [2024-11-24 00:25:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941806444] [2024-11-24 00:25:50,419 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:25:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:50,462 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:25:50,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:25:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:25:50,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:50,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941806444] [2024-11-24 00:25:50,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941806444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:25:50,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:25:50,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:25:50,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647469130] [2024-11-24 00:25:50,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:25:50,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:25:50,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:50,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:25:50,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:25:50,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2024-11-24 00:25:50,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 82 transitions, 604 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:50,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:50,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2024-11-24 00:25:50,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:51,635 INFO L124 PetriNetUnfolderBase]: 3578/6217 cut-off events. [2024-11-24 00:25:51,635 INFO L125 PetriNetUnfolderBase]: For 10122/10122 co-relation queries the response was YES. [2024-11-24 00:25:51,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17770 conditions, 6217 events. 3578/6217 cut-off events. For 10122/10122 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 36106 event pairs, 672 based on Foata normal form. 319/6065 useless extension candidates. Maximal degree in co-relation 17750. Up to 3137 conditions per place. [2024-11-24 00:25:51,684 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 92 selfloop transitions, 4 changer transitions 4/102 dead transitions. [2024-11-24 00:25:51,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 942 flow [2024-11-24 00:25:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:25:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:25:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-24 00:25:51,686 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-11-24 00:25:51,686 INFO L175 Difference]: Start difference. First operand has 67 places, 82 transitions, 604 flow. Second operand 4 states and 63 transitions. [2024-11-24 00:25:51,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 942 flow [2024-11-24 00:25:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 906 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-11-24 00:25:51,714 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 486 flow [2024-11-24 00:25:51,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-11-24 00:25:51,715 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2024-11-24 00:25:51,715 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 486 flow [2024-11-24 00:25:51,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:51,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:51,716 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:51,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-24 00:25:51,716 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:51,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash 597291019, now seen corresponding path program 1 times [2024-11-24 00:25:51,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:51,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850015226] [2024-11-24 00:25:51,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:51,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:25:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:53,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:25:53,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850015226] [2024-11-24 00:25:53,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850015226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:25:53,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098073252] [2024-11-24 00:25:53,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:25:53,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:25:53,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:25:53,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:25:53,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:25:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:25:53,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-24 00:25:53,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:25:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:53,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:25:54,161 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-24 00:25:54,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2024-11-24 00:25:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:25:54,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098073252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:25:54,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:25:54,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-11-24 00:25:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804071174] [2024-11-24 00:25:54,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:25:54,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 00:25:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:25:54,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 00:25:54,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:25:54,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:25:54,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 486 flow. Second operand has 27 states, 27 states have (on average 10.0) internal successors, (270), 27 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:54,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:25:54,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:25:54,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:25:59,622 INFO L124 PetriNetUnfolderBase]: 7018/13558 cut-off events. [2024-11-24 00:25:59,622 INFO L125 PetriNetUnfolderBase]: For 25168/25172 co-relation queries the response was YES. [2024-11-24 00:25:59,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39928 conditions, 13558 events. 7018/13558 cut-off events. For 25168/25172 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 104284 event pairs, 704 based on Foata normal form. 20/12675 useless extension candidates. Maximal degree in co-relation 39907. Up to 2235 conditions per place. [2024-11-24 00:25:59,699 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 196 selfloop transitions, 54 changer transitions 261/518 dead transitions. [2024-11-24 00:25:59,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 518 transitions, 3575 flow [2024-11-24 00:25:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-24 00:25:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-24 00:25:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 722 transitions. [2024-11-24 00:25:59,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785256410256411 [2024-11-24 00:25:59,704 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 486 flow. Second operand 39 states and 722 transitions. [2024-11-24 00:25:59,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 518 transitions, 3575 flow [2024-11-24 00:25:59,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 518 transitions, 3559 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-24 00:25:59,738 INFO L231 Difference]: Finished difference. Result has 130 places, 97 transitions, 1079 flow [2024-11-24 00:25:59,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1079, PETRI_PLACES=130, PETRI_TRANSITIONS=97} [2024-11-24 00:25:59,739 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-11-24 00:25:59,739 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 97 transitions, 1079 flow [2024-11-24 00:25:59,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.0) internal successors, (270), 27 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:25:59,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:25:59,740 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:25:59,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 00:25:59,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 00:25:59,945 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:25:59,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:25:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -383366131, now seen corresponding path program 2 times [2024-11-24 00:25:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:25:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265174763] [2024-11-24 00:25:59,946 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:25:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:00,008 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:26:00,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:01,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:01,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265174763] [2024-11-24 00:26:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265174763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949235398] [2024-11-24 00:26:01,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:26:01,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:01,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:01,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:01,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:26:01,186 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:26:01,187 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:01,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-24 00:26:01,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:01,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:02,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:26:02,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-24 00:26:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:02,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949235398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:02,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:02,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-11-24 00:26:02,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880037877] [2024-11-24 00:26:02,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:02,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 00:26:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:02,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 00:26:02,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2024-11-24 00:26:02,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:02,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 97 transitions, 1079 flow. Second operand has 26 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:02,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:02,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:02,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:26:05,092 INFO L124 PetriNetUnfolderBase]: 5352/10179 cut-off events. [2024-11-24 00:26:05,092 INFO L125 PetriNetUnfolderBase]: For 98896/98896 co-relation queries the response was YES. [2024-11-24 00:26:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40200 conditions, 10179 events. 5352/10179 cut-off events. For 98896/98896 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 74652 event pairs, 1409 based on Foata normal form. 9/9503 useless extension candidates. Maximal degree in co-relation 40153. Up to 2126 conditions per place. [2024-11-24 00:26:05,156 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 75 selfloop transitions, 29 changer transitions 134/245 dead transitions. [2024-11-24 00:26:05,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 245 transitions, 2511 flow [2024-11-24 00:26:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:26:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 00:26:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 298 transitions. [2024-11-24 00:26:05,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5477941176470589 [2024-11-24 00:26:05,163 INFO L175 Difference]: Start difference. First operand has 130 places, 97 transitions, 1079 flow. Second operand 17 states and 298 transitions. [2024-11-24 00:26:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 245 transitions, 2511 flow [2024-11-24 00:26:05,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 245 transitions, 1992 flow, removed 249 selfloop flow, removed 18 redundant places. [2024-11-24 00:26:05,506 INFO L231 Difference]: Finished difference. Result has 114 places, 72 transitions, 741 flow [2024-11-24 00:26:05,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=741, PETRI_PLACES=114, PETRI_TRANSITIONS=72} [2024-11-24 00:26:05,507 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-11-24 00:26:05,508 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 72 transitions, 741 flow [2024-11-24 00:26:05,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:05,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:26:05,509 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:26:05,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:26:05,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-24 00:26:05,713 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:26:05,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:26:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -760513962, now seen corresponding path program 3 times [2024-11-24 00:26:05,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:26:05,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340978434] [2024-11-24 00:26:05,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:26:05,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:05,778 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 00:26:05,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:26:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340978434] [2024-11-24 00:26:06,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340978434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:06,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291902316] [2024-11-24 00:26:06,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:26:06,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:06,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:06,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:06,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:26:06,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 00:26:06,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:06,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-24 00:26:06,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:26:06,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:06,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:26:06,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-24 00:26:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:26:07,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291902316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:07,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:07,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 16 [2024-11-24 00:26:07,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181588328] [2024-11-24 00:26:07,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:07,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 00:26:07,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:07,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 00:26:07,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:26:07,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:07,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 72 transitions, 741 flow. Second operand has 17 states, 17 states have (on average 11.235294117647058) internal successors, (191), 17 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:07,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:07,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:07,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:26:08,102 INFO L124 PetriNetUnfolderBase]: 3995/7556 cut-off events. [2024-11-24 00:26:08,102 INFO L125 PetriNetUnfolderBase]: For 36278/36286 co-relation queries the response was YES. [2024-11-24 00:26:08,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26240 conditions, 7556 events. 3995/7556 cut-off events. For 36278/36286 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 51745 event pairs, 487 based on Foata normal form. 12/7055 useless extension candidates. Maximal degree in co-relation 26201. Up to 1556 conditions per place. [2024-11-24 00:26:08,145 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 106 selfloop transitions, 36 changer transitions 42/191 dead transitions. [2024-11-24 00:26:08,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 191 transitions, 1770 flow [2024-11-24 00:26:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:26:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 00:26:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-11-24 00:26:08,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5649038461538461 [2024-11-24 00:26:08,147 INFO L175 Difference]: Start difference. First operand has 114 places, 72 transitions, 741 flow. Second operand 13 states and 235 transitions. [2024-11-24 00:26:08,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 191 transitions, 1770 flow [2024-11-24 00:26:08,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 191 transitions, 1470 flow, removed 140 selfloop flow, removed 20 redundant places. [2024-11-24 00:26:08,250 INFO L231 Difference]: Finished difference. Result has 89 places, 82 transitions, 843 flow [2024-11-24 00:26:08,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=843, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2024-11-24 00:26:08,251 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-11-24 00:26:08,251 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 843 flow [2024-11-24 00:26:08,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.235294117647058) internal successors, (191), 17 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:08,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:26:08,251 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:26:08,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 00:26:08,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 00:26:08,455 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:26:08,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:26:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1376014154, now seen corresponding path program 4 times [2024-11-24 00:26:08,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:26:08,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363754496] [2024-11-24 00:26:08,456 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:26:08,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:08,476 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:26:08,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:26:08,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363754496] [2024-11-24 00:26:08,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363754496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565288877] [2024-11-24 00:26:08,587 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:26:08,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:08,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:08,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:26:08,704 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:26:08,704 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:08,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 00:26:08,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:26:08,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:26:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565288877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:08,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-24 00:26:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584017039] [2024-11-24 00:26:08,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:08,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 00:26:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:08,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 00:26:08,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-24 00:26:08,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:08,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 843 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:08,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:08,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:08,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:26:10,348 INFO L124 PetriNetUnfolderBase]: 5485/10537 cut-off events. [2024-11-24 00:26:10,348 INFO L125 PetriNetUnfolderBase]: For 28129/28137 co-relation queries the response was YES. [2024-11-24 00:26:10,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32002 conditions, 10537 events. 5485/10537 cut-off events. For 28129/28137 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 76663 event pairs, 1390 based on Foata normal form. 38/9866 useless extension candidates. Maximal degree in co-relation 31973. Up to 3954 conditions per place. [2024-11-24 00:26:10,413 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 83 selfloop transitions, 48 changer transitions 0/138 dead transitions. [2024-11-24 00:26:10,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 138 transitions, 1534 flow [2024-11-24 00:26:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:26:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:26:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-24 00:26:10,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-11-24 00:26:10,415 INFO L175 Difference]: Start difference. First operand has 89 places, 82 transitions, 843 flow. Second operand 5 states and 102 transitions. [2024-11-24 00:26:10,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 138 transitions, 1534 flow [2024-11-24 00:26:10,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 138 transitions, 1392 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-11-24 00:26:10,456 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 1148 flow [2024-11-24 00:26:10,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-11-24 00:26:10,457 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-11-24 00:26:10,457 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 1148 flow [2024-11-24 00:26:10,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:10,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:26:10,457 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:26:10,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 00:26:10,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:10,662 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:26:10,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:26:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1015701538, now seen corresponding path program 5 times [2024-11-24 00:26:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:26:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365505387] [2024-11-24 00:26:10,663 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:26:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:10,695 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 00:26:10,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365505387] [2024-11-24 00:26:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365505387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060452213] [2024-11-24 00:26:11,442 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:26:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:11,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:11,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:26:11,537 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 00:26:11,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:11,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 00:26:11,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:12,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:12,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:26:12,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-24 00:26:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060452213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:13,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:13,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-24 00:26:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659789061] [2024-11-24 00:26:13,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:13,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 00:26:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:13,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 00:26:13,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2024-11-24 00:26:13,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:13,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 1148 flow. Second operand has 32 states, 32 states have (on average 9.84375) internal successors, (315), 32 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:13,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:13,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:13,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:26:18,049 INFO L124 PetriNetUnfolderBase]: 9610/18553 cut-off events. [2024-11-24 00:26:18,049 INFO L125 PetriNetUnfolderBase]: For 60168/60176 co-relation queries the response was YES. [2024-11-24 00:26:18,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57999 conditions, 18553 events. 9610/18553 cut-off events. For 60168/60176 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 141052 event pairs, 2446 based on Foata normal form. 184/17482 useless extension candidates. Maximal degree in co-relation 57969. Up to 6151 conditions per place. [2024-11-24 00:26:18,131 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 330 selfloop transitions, 119 changer transitions 132/588 dead transitions. [2024-11-24 00:26:18,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 588 transitions, 4964 flow [2024-11-24 00:26:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 00:26:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-24 00:26:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 819 transitions. [2024-11-24 00:26:18,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5816761363636364 [2024-11-24 00:26:18,135 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 1148 flow. Second operand 44 states and 819 transitions. [2024-11-24 00:26:18,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 588 transitions, 4964 flow [2024-11-24 00:26:18,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 588 transitions, 4654 flow, removed 146 selfloop flow, removed 1 redundant places. [2024-11-24 00:26:18,237 INFO L231 Difference]: Finished difference. Result has 158 places, 197 transitions, 2903 flow [2024-11-24 00:26:18,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2903, PETRI_PLACES=158, PETRI_TRANSITIONS=197} [2024-11-24 00:26:18,238 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-11-24 00:26:18,238 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 197 transitions, 2903 flow [2024-11-24 00:26:18,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.84375) internal successors, (315), 32 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:18,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:26:18,239 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:26:18,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 00:26:18,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 00:26:18,439 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:26:18,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:26:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1784570795, now seen corresponding path program 6 times [2024-11-24 00:26:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:26:18,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404366479] [2024-11-24 00:26:18,440 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:26:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:18,478 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-24 00:26:18,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:19,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404366479] [2024-11-24 00:26:19,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404366479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:19,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198834326] [2024-11-24 00:26:19,851 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:26:19,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:19,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:19,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:26:19,951 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-24 00:26:19,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:19,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-24 00:26:19,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:26:20,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:20,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:26:20,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-24 00:26:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:26:20,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198834326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:20,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:20,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 24 [2024-11-24 00:26:20,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722982638] [2024-11-24 00:26:20,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:20,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:26:20,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:20,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:26:20,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:26:20,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:20,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 197 transitions, 2903 flow. Second operand has 25 states, 25 states have (on average 10.84) internal successors, (271), 25 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:20,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:20,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:26:23,822 INFO L124 PetriNetUnfolderBase]: 10396/19856 cut-off events. [2024-11-24 00:26:23,823 INFO L125 PetriNetUnfolderBase]: For 272719/272731 co-relation queries the response was YES. [2024-11-24 00:26:23,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81784 conditions, 19856 events. 10396/19856 cut-off events. For 272719/272731 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 151042 event pairs, 3594 based on Foata normal form. 16/18524 useless extension candidates. Maximal degree in co-relation 81724. Up to 9411 conditions per place. [2024-11-24 00:26:23,975 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 212 selfloop transitions, 68 changer transitions 43/330 dead transitions. [2024-11-24 00:26:23,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 330 transitions, 4456 flow [2024-11-24 00:26:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 00:26:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 00:26:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 257 transitions. [2024-11-24 00:26:23,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.501953125 [2024-11-24 00:26:23,977 INFO L175 Difference]: Start difference. First operand has 158 places, 197 transitions, 2903 flow. Second operand 16 states and 257 transitions. [2024-11-24 00:26:23,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 330 transitions, 4456 flow [2024-11-24 00:26:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 330 transitions, 3861 flow, removed 291 selfloop flow, removed 6 redundant places. [2024-11-24 00:26:24,343 INFO L231 Difference]: Finished difference. Result has 170 places, 208 transitions, 2723 flow [2024-11-24 00:26:24,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2723, PETRI_PLACES=170, PETRI_TRANSITIONS=208} [2024-11-24 00:26:24,344 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-11-24 00:26:24,344 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 208 transitions, 2723 flow [2024-11-24 00:26:24,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.84) internal successors, (271), 25 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:24,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:26:24,344 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:26:24,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-24 00:26:24,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 00:26:24,545 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:26:24,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:26:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash 847232362, now seen corresponding path program 7 times [2024-11-24 00:26:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:26:24,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081872661] [2024-11-24 00:26:24,546 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:26:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:26:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:26,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081872661] [2024-11-24 00:26:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081872661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378544616] [2024-11-24 00:26:26,223 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:26:26,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:26,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:26,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:26:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:26:26,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-24 00:26:26,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:27,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:28,032 INFO L349 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2024-11-24 00:26:28,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 84 [2024-11-24 00:26:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378544616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:28,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:28,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-24 00:26:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456930217] [2024-11-24 00:26:28,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:28,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-24 00:26:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:28,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-24 00:26:28,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2024-11-24 00:26:28,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:28,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 208 transitions, 2723 flow. Second operand has 38 states, 38 states have (on average 9.763157894736842) internal successors, (371), 38 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:28,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:28,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:28,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:26:38,232 INFO L124 PetriNetUnfolderBase]: 16412/31750 cut-off events. [2024-11-24 00:26:38,232 INFO L125 PetriNetUnfolderBase]: For 488133/488145 co-relation queries the response was YES. [2024-11-24 00:26:38,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127659 conditions, 31750 events. 16412/31750 cut-off events. For 488133/488145 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 257069 event pairs, 2909 based on Foata normal form. 585/30154 useless extension candidates. Maximal degree in co-relation 127595. Up to 6613 conditions per place. [2024-11-24 00:26:38,670 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 328 selfloop transitions, 247 changer transitions 272/854 dead transitions. [2024-11-24 00:26:38,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 854 transitions, 9677 flow [2024-11-24 00:26:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-24 00:26:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-24 00:26:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 964 transitions. [2024-11-24 00:26:38,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5578703703703703 [2024-11-24 00:26:38,673 INFO L175 Difference]: Start difference. First operand has 170 places, 208 transitions, 2723 flow. Second operand 54 states and 964 transitions. [2024-11-24 00:26:38,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 854 transitions, 9677 flow [2024-11-24 00:26:39,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 854 transitions, 9406 flow, removed 80 selfloop flow, removed 11 redundant places. [2024-11-24 00:26:39,108 INFO L231 Difference]: Finished difference. Result has 243 places, 348 transitions, 6056 flow [2024-11-24 00:26:39,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6056, PETRI_PLACES=243, PETRI_TRANSITIONS=348} [2024-11-24 00:26:39,109 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-11-24 00:26:39,109 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 348 transitions, 6056 flow [2024-11-24 00:26:39,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.763157894736842) internal successors, (371), 38 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:39,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:26:39,110 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:26:39,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 00:26:39,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:39,310 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:26:39,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:26:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1464882020, now seen corresponding path program 8 times [2024-11-24 00:26:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:26:39,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858464904] [2024-11-24 00:26:39,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:26:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:26:39,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:26:39,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:26:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858464904] [2024-11-24 00:26:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858464904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:26:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058301482] [2024-11-24 00:26:40,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:26:40,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:26:40,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:26:40,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:26:40,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:26:40,957 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:26:40,957 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:26:40,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-24 00:26:40,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:26:41,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:26:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:41,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:26:42,948 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 171 treesize of output 153 [2024-11-24 00:26:43,075 INFO L349 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2024-11-24 00:26:43,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 546 treesize of output 440 [2024-11-24 00:26:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:26:46,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058301482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:26:46,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:26:46,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-24 00:26:46,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544020262] [2024-11-24 00:26:46,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:26:46,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-24 00:26:46,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:26:46,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-24 00:26:46,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 00:26:46,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:26:46,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 348 transitions, 6056 flow. Second operand has 34 states, 34 states have (on average 10.088235294117647) internal successors, (343), 34 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:26:46,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:26:46,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:26:46,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:27:07,655 INFO L124 PetriNetUnfolderBase]: 26046/50102 cut-off events. [2024-11-24 00:27:07,655 INFO L125 PetriNetUnfolderBase]: For 1643144/1643152 co-relation queries the response was YES. [2024-11-24 00:27:08,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241878 conditions, 50102 events. 26046/50102 cut-off events. For 1643144/1643152 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 418858 event pairs, 6176 based on Foata normal form. 63/46723 useless extension candidates. Maximal degree in co-relation 241783. Up to 9729 conditions per place. [2024-11-24 00:27:08,103 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 554 selfloop transitions, 437 changer transitions 316/1314 dead transitions. [2024-11-24 00:27:08,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1314 transitions, 20258 flow [2024-11-24 00:27:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-24 00:27:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-11-24 00:27:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1298 transitions. [2024-11-24 00:27:08,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5794642857142858 [2024-11-24 00:27:08,109 INFO L175 Difference]: Start difference. First operand has 243 places, 348 transitions, 6056 flow. Second operand 70 states and 1298 transitions. [2024-11-24 00:27:08,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1314 transitions, 20258 flow [2024-11-24 00:27:11,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1314 transitions, 15109 flow, removed 2551 selfloop flow, removed 17 redundant places. [2024-11-24 00:27:11,307 INFO L231 Difference]: Finished difference. Result has 312 places, 592 transitions, 9351 flow [2024-11-24 00:27:11,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=9351, PETRI_PLACES=312, PETRI_TRANSITIONS=592} [2024-11-24 00:27:11,308 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-11-24 00:27:11,308 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 592 transitions, 9351 flow [2024-11-24 00:27:11,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.088235294117647) internal successors, (343), 34 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:27:11,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:27:11,309 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:27:11,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:27:11,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:27:11,510 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:27:11,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:27:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash -214307696, now seen corresponding path program 9 times [2024-11-24 00:27:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:27:11,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356051432] [2024-11-24 00:27:11,515 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:27:11,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:27:11,643 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:27:11,644 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:27:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:27:13,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:27:13,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356051432] [2024-11-24 00:27:13,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356051432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:27:13,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416771515] [2024-11-24 00:27:13,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:27:13,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:27:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:27:13,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:27:13,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bd00226-db99-479d-b9e1-f447bb32c17e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:27:13,526 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:27:13,526 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:27:13,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-24 00:27:13,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:27:14,510 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-11-24 00:27:14,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-11-24 00:27:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:27:14,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:27:16,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:27:16,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 283 [2024-11-24 00:27:17,372 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-24 00:27:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:27:36,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416771515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:27:36,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:27:36,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 35 [2024-11-24 00:27:36,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20400764] [2024-11-24 00:27:36,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:27:36,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-24 00:27:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:27:36,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-24 00:27:36,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:27:36,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-24 00:27:36,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 592 transitions, 9351 flow. Second operand has 36 states, 36 states have (on average 9.916666666666666) internal successors, (357), 36 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:27:36,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:27:36,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-24 00:27:36,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand