./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/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_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/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_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:52:47,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:52:48,012 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 01:52:48,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:52:48,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:52:48,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:52:48,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:52:48,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:52:48,044 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:52:48,045 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:52:48,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:52:48,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:52:48,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:52:48,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:52:48,046 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:52:48,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:52:48,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:52:48,046 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:52:48,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:52:48,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:52:48,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:52:48,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:52:48,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:52:48,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:52:48,047 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:52:48,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:52:48,048 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:52:48,048 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:52:48,048 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:52:48,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:52:48,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:52:48,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:52:48,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:52:48,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:52:48,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:52:48,049 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:52:48,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:52:48,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:52:48,050 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:52:48,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:52:48,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:52:48,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:52:48,051 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_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/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 -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-11-24 01:52:48,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:52:48,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:52:48,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:52:48,390 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:52:48,391 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:52:48,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-24 01:52:51,841 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/data/f0299a5bd/55156bc32b7746f5b75409936fb7ad33/FLAGd78e624b0 [2024-11-24 01:52:52,183 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:52:52,183 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-24 01:52:52,197 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/data/f0299a5bd/55156bc32b7746f5b75409936fb7ad33/FLAGd78e624b0 [2024-11-24 01:52:52,223 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/data/f0299a5bd/55156bc32b7746f5b75409936fb7ad33 [2024-11-24 01:52:52,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:52:52,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:52:52,230 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:52:52,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:52:52,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:52:52,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f91e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52, skipping insertion in model container [2024-11-24 01:52:52,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,267 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:52:52,517 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_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2564,2577] [2024-11-24 01:52:52,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:52:52,547 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:52:52,582 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_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2564,2577] [2024-11-24 01:52:52,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:52:52,608 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:52:52,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52 WrapperNode [2024-11-24 01:52:52,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:52:52,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:52:52,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:52:52,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:52:52,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,660 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 178 [2024-11-24 01:52:52,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:52:52,661 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:52:52,661 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:52:52,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:52:52,673 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,680 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,713 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 01:52:52,713 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,713 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,725 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:52:52,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:52:52,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:52:52,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:52:52,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (1/1) ... [2024-11-24 01:52:52,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:52:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:52:52,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:52:52,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:52:52,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:52:52,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:52:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:52:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:52:52,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:52:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-24 01:52:52,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-24 01:52:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:52:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:52:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 01:52:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 01:52:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 01:52:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 01:52:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:52:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:52:52,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:52:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 01:52:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 01:52:52,833 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 01:52:52,977 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:52:52,980 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:52:53,364 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:52:53,364 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:52:53,747 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:52:53,747 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-24 01:52:53,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:52:53 BoogieIcfgContainer [2024-11-24 01:52:53,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:52:53,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:52:53,753 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:52:53,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:52:53,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:52:52" (1/3) ... [2024-11-24 01:52:53,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245e36be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:52:53, skipping insertion in model container [2024-11-24 01:52:53,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:52:52" (2/3) ... [2024-11-24 01:52:53,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245e36be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:52:53, skipping insertion in model container [2024-11-24 01:52:53,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:52:53" (3/3) ... [2024-11-24 01:52:53,765 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-11-24 01:52:53,791 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:52:53,793 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt2.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-24 01:52:53,793 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:52:53,874 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-24 01:52:53,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-11-24 01:52:53,975 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-11-24 01:52:53,981 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 01:52:53,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-24 01:52:53,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-11-24 01:52:53,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-11-24 01:52:54,004 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:52:54,023 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;@55dc7e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:52:54,025 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-24 01:52:54,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:52:54,050 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-24 01:52:54,050 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 01:52:54,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:54,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:54,051 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:54,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 144257127, now seen corresponding path program 1 times [2024-11-24 01:52:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:54,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022385676] [2024-11-24 01:52:54,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:52:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:52:54,419 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 01:52:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022385676] [2024-11-24 01:52:54,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022385676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:52:54,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:52:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:52:54,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442522140] [2024-11-24 01:52:54,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:52:54,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:52:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:54,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:52:54,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:52:54,470 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-24 01:52:54,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:54,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:54,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-24 01:52:54,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:52:54,861 INFO L124 PetriNetUnfolderBase]: 617/947 cut-off events. [2024-11-24 01:52:54,861 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-24 01:52:54,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 947 events. 617/947 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3755 event pairs, 126 based on Foata normal form. 1/934 useless extension candidates. Maximal degree in co-relation 1708. Up to 677 conditions per place. [2024-11-24 01:52:54,879 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-11-24 01:52:54,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-11-24 01:52:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:52:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:52:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-24 01:52:54,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-24 01:52:54,898 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-11-24 01:52:54,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-11-24 01:52:54,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:52:54,908 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-11-24 01:52:54,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-24 01:52:54,915 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-11-24 01:52:54,917 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-11-24 01:52:54,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:54,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:54,918 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:54,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:52:54,918 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:54,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1715318295, now seen corresponding path program 1 times [2024-11-24 01:52:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:54,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950863801] [2024-11-24 01:52:54,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:52:54,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:52:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:55,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:55,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950863801] [2024-11-24 01:52:55,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950863801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:52:55,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:52:55,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:52:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488998333] [2024-11-24 01:52:55,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:52:55,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:52:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:55,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:52:55,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:52:55,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-24 01:52:55,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:52:55,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:55,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-24 01:52:55,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:52:55,851 INFO L124 PetriNetUnfolderBase]: 1206/1857 cut-off events. [2024-11-24 01:52:55,854 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-11-24 01:52:55,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 1857 events. 1206/1857 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8812 event pairs, 745 based on Foata normal form. 0/1748 useless extension candidates. Maximal degree in co-relation 1070. Up to 1120 conditions per place. [2024-11-24 01:52:55,874 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 63 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2024-11-24 01:52:55,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 71 transitions, 334 flow [2024-11-24 01:52:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:52:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:52:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-24 01:52:55,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-11-24 01:52:55,878 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 5 states and 92 transitions. [2024-11-24 01:52:55,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 71 transitions, 334 flow [2024-11-24 01:52:55,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 71 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:52:55,883 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 122 flow [2024-11-24 01:52:55,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-24 01:52:55,884 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-24 01:52:55,885 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 122 flow [2024-11-24 01:52:55,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:52:55,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:55,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:55,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:52:55,888 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:55,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 123789768, now seen corresponding path program 1 times [2024-11-24 01:52:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:55,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396117211] [2024-11-24 01:52:55,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:52:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:52:56,210 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 01:52:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:56,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396117211] [2024-11-24 01:52:56,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396117211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:52:56,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:52:56,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:52:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887490204] [2024-11-24 01:52:56,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:52:56,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:52:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:56,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:52:56,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:52:56,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-24 01:52:56,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:52:56,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:56,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-24 01:52:56,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:52:56,593 INFO L124 PetriNetUnfolderBase]: 1047/1611 cut-off events. [2024-11-24 01:52:56,593 INFO L125 PetriNetUnfolderBase]: For 669/756 co-relation queries the response was YES. [2024-11-24 01:52:56,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 1611 events. 1047/1611 cut-off events. For 669/756 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7284 event pairs, 686 based on Foata normal form. 0/1508 useless extension candidates. Maximal degree in co-relation 2742. Up to 1133 conditions per place. [2024-11-24 01:52:56,605 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 56 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-11-24 01:52:56,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 326 flow [2024-11-24 01:52:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:52:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:52:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-24 01:52:56,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-24 01:52:56,608 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 122 flow. Second operand 5 states and 87 transitions. [2024-11-24 01:52:56,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 326 flow [2024-11-24 01:52:56,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 322 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-24 01:52:56,614 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 143 flow [2024-11-24 01:52:56,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-24 01:52:56,615 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2024-11-24 01:52:56,616 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 143 flow [2024-11-24 01:52:56,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:52:56,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:56,616 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:56,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 01:52:56,617 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:56,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1804278721, now seen corresponding path program 1 times [2024-11-24 01:52:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778529670] [2024-11-24 01:52:56,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:52:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:52:56,794 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 01:52:56,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778529670] [2024-11-24 01:52:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778529670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:52:56,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:52:56,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:52:56,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773559899] [2024-11-24 01:52:56,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:52:56,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:52:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:56,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:52:56,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:52:56,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-24 01:52:56,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:52:56,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:56,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-24 01:52:56,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:52:57,125 INFO L124 PetriNetUnfolderBase]: 882/1337 cut-off events. [2024-11-24 01:52:57,125 INFO L125 PetriNetUnfolderBase]: For 773/910 co-relation queries the response was YES. [2024-11-24 01:52:57,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1337 events. 882/1337 cut-off events. For 773/910 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5636 event pairs, 601 based on Foata normal form. 0/1270 useless extension candidates. Maximal degree in co-relation 2827. Up to 1095 conditions per place. [2024-11-24 01:52:57,134 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 28 selfloop transitions, 2 changer transitions 23/56 dead transitions. [2024-11-24 01:52:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 309 flow [2024-11-24 01:52:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:52:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:52:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-11-24 01:52:57,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-24 01:52:57,136 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 143 flow. Second operand 5 states and 81 transitions. [2024-11-24 01:52:57,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 309 flow [2024-11-24 01:52:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:52:57,140 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 116 flow [2024-11-24 01:52:57,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2024-11-24 01:52:57,140 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2024-11-24 01:52:57,141 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 116 flow [2024-11-24 01:52:57,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:52:57,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:57,141 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:57,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 01:52:57,142 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:57,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1534257575, now seen corresponding path program 1 times [2024-11-24 01:52:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:57,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320255338] [2024-11-24 01:52:57,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:52:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:52:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320255338] [2024-11-24 01:52:57,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320255338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:52:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088624382] [2024-11-24 01:52:57,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:52:57,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:52:57,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:52:57,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:52:57,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:52:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:52:57,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:52:57,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:52:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:57,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:52:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088624382] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:52:57,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:52:57,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-11-24 01:52:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307632962] [2024-11-24 01:52:57,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:52:57,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:52:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:57,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:52:57,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:52:57,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-24 01:52:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:57,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:57,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-24 01:52:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:52:58,457 INFO L124 PetriNetUnfolderBase]: 1468/2122 cut-off events. [2024-11-24 01:52:58,457 INFO L125 PetriNetUnfolderBase]: For 836/986 co-relation queries the response was YES. [2024-11-24 01:52:58,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5707 conditions, 2122 events. 1468/2122 cut-off events. For 836/986 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9225 event pairs, 293 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5688. Up to 668 conditions per place. [2024-11-24 01:52:58,475 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 87 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2024-11-24 01:52:58,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 559 flow [2024-11-24 01:52:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:52:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:52:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-11-24 01:52:58,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2024-11-24 01:52:58,478 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 116 flow. Second operand 9 states and 137 transitions. [2024-11-24 01:52:58,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 559 flow [2024-11-24 01:52:58,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 489 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-24 01:52:58,494 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 178 flow [2024-11-24 01:52:58,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-24 01:52:58,496 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2024-11-24 01:52:58,496 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 178 flow [2024-11-24 01:52:58,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:58,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:58,496 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:58,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:52:58,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:52:58,700 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:58,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1440129999, now seen corresponding path program 2 times [2024-11-24 01:52:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:58,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642117422] [2024-11-24 01:52:58,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:52:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:58,733 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:52:58,733 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:52:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:52:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642117422] [2024-11-24 01:52:58,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642117422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:52:58,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:52:58,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 01:52:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691238420] [2024-11-24 01:52:58,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:52:58,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:52:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:58,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:52:58,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:52:58,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-24 01:52:58,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:58,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:58,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-24 01:52:58,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:52:59,858 INFO L124 PetriNetUnfolderBase]: 3201/4657 cut-off events. [2024-11-24 01:52:59,859 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2024-11-24 01:52:59,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 4657 events. 3201/4657 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24160 event pairs, 327 based on Foata normal form. 13/4411 useless extension candidates. Maximal degree in co-relation 13119. Up to 1405 conditions per place. [2024-11-24 01:52:59,889 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 196 selfloop transitions, 23 changer transitions 0/221 dead transitions. [2024-11-24 01:52:59,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 221 transitions, 1373 flow [2024-11-24 01:52:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:52:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-24 01:52:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-11-24 01:52:59,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5316804407713499 [2024-11-24 01:52:59,894 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 178 flow. Second operand 11 states and 193 transitions. [2024-11-24 01:52:59,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 221 transitions, 1373 flow [2024-11-24 01:52:59,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 221 transitions, 1370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:52:59,914 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 405 flow [2024-11-24 01:52:59,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-11-24 01:52:59,915 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-11-24 01:52:59,915 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 405 flow [2024-11-24 01:52:59,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:59,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:59,915 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:59,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-24 01:52:59,916 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:52:59,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -507968209, now seen corresponding path program 3 times [2024-11-24 01:52:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883668928] [2024-11-24 01:52:59,916 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:52:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:59,944 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:52:59,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:00,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:00,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883668928] [2024-11-24 01:53:00,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883668928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:00,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276807872] [2024-11-24 01:53:00,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:53:00,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:00,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:00,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:00,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:53:00,188 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:53:00,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:00,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:53:00,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:00,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276807872] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:00,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:53:00,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-24 01:53:00,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045351564] [2024-11-24 01:53:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:00,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:53:00,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:00,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:53:00,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:53:00,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-24 01:53:00,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:00,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:00,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-24 01:53:00,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:01,360 INFO L124 PetriNetUnfolderBase]: 4349/6271 cut-off events. [2024-11-24 01:53:01,360 INFO L125 PetriNetUnfolderBase]: For 13010/13379 co-relation queries the response was YES. [2024-11-24 01:53:01,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22306 conditions, 6271 events. 4349/6271 cut-off events. For 13010/13379 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32803 event pairs, 760 based on Foata normal form. 186/6452 useless extension candidates. Maximal degree in co-relation 22275. Up to 1984 conditions per place. [2024-11-24 01:53:01,427 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 125 selfloop transitions, 40 changer transitions 0/168 dead transitions. [2024-11-24 01:53:01,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 168 transitions, 1272 flow [2024-11-24 01:53:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:53:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:53:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-24 01:53:01,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-11-24 01:53:01,428 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 405 flow. Second operand 9 states and 144 transitions. [2024-11-24 01:53:01,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 168 transitions, 1272 flow [2024-11-24 01:53:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 168 transitions, 1260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:53:01,510 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 681 flow [2024-11-24 01:53:01,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2024-11-24 01:53:01,512 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 39 predicate places. [2024-11-24 01:53:01,512 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 681 flow [2024-11-24 01:53:01,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:01,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:01,514 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:01,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 01:53:01,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:01,721 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:01,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:01,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1713531670, now seen corresponding path program 1 times [2024-11-24 01:53:01,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:01,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344239978] [2024-11-24 01:53:01,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:53:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:53:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:01,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:01,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344239978] [2024-11-24 01:53:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344239978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:01,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409388892] [2024-11-24 01:53:01,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:53:01,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:01,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:01,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:01,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:53:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:53:01,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:53:01,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:01,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409388892] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:53:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-24 01:53:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732364715] [2024-11-24 01:53:02,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:02,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:53:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:02,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:53:02,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:53:02,036 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-24 01:53:02,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 681 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:53:02,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:02,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-24 01:53:02,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:02,800 INFO L124 PetriNetUnfolderBase]: 3758/5577 cut-off events. [2024-11-24 01:53:02,800 INFO L125 PetriNetUnfolderBase]: For 23870/23982 co-relation queries the response was YES. [2024-11-24 01:53:02,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23692 conditions, 5577 events. 3758/5577 cut-off events. For 23870/23982 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30337 event pairs, 1005 based on Foata normal form. 213/5524 useless extension candidates. Maximal degree in co-relation 23654. Up to 3099 conditions per place. [2024-11-24 01:53:02,848 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 101 selfloop transitions, 9 changer transitions 0/121 dead transitions. [2024-11-24 01:53:02,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 121 transitions, 1275 flow [2024-11-24 01:53:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:53:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:53:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-24 01:53:02,849 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-24 01:53:02,849 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 681 flow. Second operand 5 states and 72 transitions. [2024-11-24 01:53:02,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 121 transitions, 1275 flow [2024-11-24 01:53:02,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 1206 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-24 01:53:02,939 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 652 flow [2024-11-24 01:53:02,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=652, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-11-24 01:53:02,940 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 39 predicate places. [2024-11-24 01:53:02,941 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 652 flow [2024-11-24 01:53:02,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:53:02,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:02,941 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:02,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:53:03,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:03,142 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:03,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1371501181, now seen corresponding path program 4 times [2024-11-24 01:53:03,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:03,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170374546] [2024-11-24 01:53:03,142 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:53:03,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:03,157 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:53:03,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:03,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170374546] [2024-11-24 01:53:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170374546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317673241] [2024-11-24 01:53:03,241 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:53:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:03,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:03,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:03,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:53:03,326 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:53:03,326 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:03,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:53:03,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:03,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:03,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317673241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:53:03,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:53:03,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-24 01:53:03,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628658404] [2024-11-24 01:53:03,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:53:03,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:53:03,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:03,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:53:03,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:53:03,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-24 01:53:03,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 652 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:03,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:03,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-24 01:53:03,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:06,591 INFO L124 PetriNetUnfolderBase]: 9584/13587 cut-off events. [2024-11-24 01:53:06,592 INFO L125 PetriNetUnfolderBase]: For 52836/52836 co-relation queries the response was YES. [2024-11-24 01:53:06,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57773 conditions, 13587 events. 9584/13587 cut-off events. For 52836/52836 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 73461 event pairs, 987 based on Foata normal form. 14/13600 useless extension candidates. Maximal degree in co-relation 57734. Up to 3373 conditions per place. [2024-11-24 01:53:06,701 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 342 selfloop transitions, 197 changer transitions 0/540 dead transitions. [2024-11-24 01:53:06,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 540 transitions, 4772 flow [2024-11-24 01:53:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-24 01:53:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-24 01:53:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 462 transitions. [2024-11-24 01:53:06,704 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-24 01:53:06,704 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 652 flow. Second operand 33 states and 462 transitions. [2024-11-24 01:53:06,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 540 transitions, 4772 flow [2024-11-24 01:53:06,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 540 transitions, 4699 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:53:07,005 INFO L231 Difference]: Finished difference. Result has 122 places, 268 transitions, 2946 flow [2024-11-24 01:53:07,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2946, PETRI_PLACES=122, PETRI_TRANSITIONS=268} [2024-11-24 01:53:07,006 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2024-11-24 01:53:07,006 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 268 transitions, 2946 flow [2024-11-24 01:53:07,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:07,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:07,006 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:07,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:53:07,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:07,207 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:07,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash 330703139, now seen corresponding path program 5 times [2024-11-24 01:53:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573509582] [2024-11-24 01:53:07,208 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:53:07,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:07,223 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:07,224 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:53:07,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573509582] [2024-11-24 01:53:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573509582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448738781] [2024-11-24 01:53:07,327 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:53:07,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:07,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:53:07,412 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:07,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:07,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:53:07,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:53:07,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:53:07,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448738781] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:07,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:53:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-11-24 01:53:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146258092] [2024-11-24 01:53:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:07,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:53:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:07,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:53:07,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:53:07,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-24 01:53:07,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 268 transitions, 2946 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:07,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:07,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-24 01:53:07,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:09,369 INFO L124 PetriNetUnfolderBase]: 8251/11921 cut-off events. [2024-11-24 01:53:09,370 INFO L125 PetriNetUnfolderBase]: For 74242/74910 co-relation queries the response was YES. [2024-11-24 01:53:09,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59801 conditions, 11921 events. 8251/11921 cut-off events. For 74242/74910 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 68362 event pairs, 780 based on Foata normal form. 275/12170 useless extension candidates. Maximal degree in co-relation 59744. Up to 3661 conditions per place. [2024-11-24 01:53:09,509 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 186 selfloop transitions, 194 changer transitions 0/387 dead transitions. [2024-11-24 01:53:09,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 387 transitions, 4796 flow [2024-11-24 01:53:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:53:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:53:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-11-24 01:53:09,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2024-11-24 01:53:09,513 INFO L175 Difference]: Start difference. First operand has 122 places, 268 transitions, 2946 flow. Second operand 9 states and 130 transitions. [2024-11-24 01:53:09,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 387 transitions, 4796 flow [2024-11-24 01:53:10,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 387 transitions, 4484 flow, removed 156 selfloop flow, removed 0 redundant places. [2024-11-24 01:53:10,648 INFO L231 Difference]: Finished difference. Result has 132 places, 310 transitions, 3666 flow [2024-11-24 01:53:10,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3666, PETRI_PLACES=132, PETRI_TRANSITIONS=310} [2024-11-24 01:53:10,649 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-11-24 01:53:10,649 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 310 transitions, 3666 flow [2024-11-24 01:53:10,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:10,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:10,650 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:10,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:53:10,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:53:10,850 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:10,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash 324491903, now seen corresponding path program 6 times [2024-11-24 01:53:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:10,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299543246] [2024-11-24 01:53:10,851 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:53:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:10,874 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-24 01:53:10,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:11,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:11,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299543246] [2024-11-24 01:53:11,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299543246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:53:11,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:53:11,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 01:53:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949602748] [2024-11-24 01:53:11,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:11,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:53:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:11,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:53:11,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:53:11,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-24 01:53:11,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 310 transitions, 3666 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:11,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:11,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-24 01:53:11,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:14,597 INFO L124 PetriNetUnfolderBase]: 12951/18335 cut-off events. [2024-11-24 01:53:14,597 INFO L125 PetriNetUnfolderBase]: For 130642/130642 co-relation queries the response was YES. [2024-11-24 01:53:14,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95157 conditions, 18335 events. 12951/18335 cut-off events. For 130642/130642 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 105525 event pairs, 3029 based on Foata normal form. 13/18347 useless extension candidates. Maximal degree in co-relation 95095. Up to 9922 conditions per place. [2024-11-24 01:53:14,770 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 631 selfloop transitions, 149 changer transitions 0/781 dead transitions. [2024-11-24 01:53:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 781 transitions, 10449 flow [2024-11-24 01:53:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:53:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-24 01:53:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-11-24 01:53:14,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-11-24 01:53:14,772 INFO L175 Difference]: Start difference. First operand has 132 places, 310 transitions, 3666 flow. Second operand 12 states and 209 transitions. [2024-11-24 01:53:14,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 781 transitions, 10449 flow [2024-11-24 01:53:16,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 781 transitions, 10330 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-11-24 01:53:16,801 INFO L231 Difference]: Finished difference. Result has 150 places, 451 transitions, 6144 flow [2024-11-24 01:53:16,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6144, PETRI_PLACES=150, PETRI_TRANSITIONS=451} [2024-11-24 01:53:16,802 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 115 predicate places. [2024-11-24 01:53:16,802 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 451 transitions, 6144 flow [2024-11-24 01:53:16,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:16,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:16,802 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:16,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-24 01:53:16,803 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:16,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -546054543, now seen corresponding path program 7 times [2024-11-24 01:53:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324115001] [2024-11-24 01:53:16,804 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:53:16,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:53:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324115001] [2024-11-24 01:53:17,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324115001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121379849] [2024-11-24 01:53:17,117 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:53:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:17,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:17,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:53:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:53:17,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:53:17,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:17,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:17,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121379849] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:17,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:53:17,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2024-11-24 01:53:17,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543593843] [2024-11-24 01:53:17,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:17,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:53:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:17,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:53:17,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:53:17,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-24 01:53:17,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 451 transitions, 6144 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:17,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:17,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-24 01:53:17,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:20,705 INFO L124 PetriNetUnfolderBase]: 12191/17437 cut-off events. [2024-11-24 01:53:20,705 INFO L125 PetriNetUnfolderBase]: For 144057/144926 co-relation queries the response was YES. [2024-11-24 01:53:20,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96390 conditions, 17437 events. 12191/17437 cut-off events. For 144057/144926 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 104371 event pairs, 1879 based on Foata normal form. 275/17694 useless extension candidates. Maximal degree in co-relation 96320. Up to 6001 conditions per place. [2024-11-24 01:53:20,886 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 352 selfloop transitions, 306 changer transitions 0/665 dead transitions. [2024-11-24 01:53:20,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 665 transitions, 9507 flow [2024-11-24 01:53:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:53:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:53:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-11-24 01:53:20,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-11-24 01:53:20,888 INFO L175 Difference]: Start difference. First operand has 150 places, 451 transitions, 6144 flow. Second operand 9 states and 143 transitions. [2024-11-24 01:53:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 665 transitions, 9507 flow [2024-11-24 01:53:22,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 665 transitions, 9392 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-11-24 01:53:22,609 INFO L231 Difference]: Finished difference. Result has 160 places, 526 transitions, 7986 flow [2024-11-24 01:53:22,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6062, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7986, PETRI_PLACES=160, PETRI_TRANSITIONS=526} [2024-11-24 01:53:22,610 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 125 predicate places. [2024-11-24 01:53:22,610 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 526 transitions, 7986 flow [2024-11-24 01:53:22,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:22,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:22,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:22,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:53:22,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:22,811 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:22,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1215898281, now seen corresponding path program 8 times [2024-11-24 01:53:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:22,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401012820] [2024-11-24 01:53:22,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:53:22,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:22,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:22,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:22,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:22,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401012820] [2024-11-24 01:53:22,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401012820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:22,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616874758] [2024-11-24 01:53:22,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:53:22,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:22,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:22,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:53:23,079 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:23,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:23,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:53:23,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:23,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616874758] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:23,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:53:23,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-24 01:53:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545355977] [2024-11-24 01:53:23,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:23,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:53:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:23,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:53:23,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:53:23,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-24 01:53:23,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 526 transitions, 7986 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:23,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:23,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-24 01:53:23,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:26,677 INFO L124 PetriNetUnfolderBase]: 12138/17463 cut-off events. [2024-11-24 01:53:26,677 INFO L125 PetriNetUnfolderBase]: For 187497/188313 co-relation queries the response was YES. [2024-11-24 01:53:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101736 conditions, 17463 events. 12138/17463 cut-off events. For 187497/188313 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 105222 event pairs, 1639 based on Foata normal form. 308/17735 useless extension candidates. Maximal degree in co-relation 101660. Up to 8807 conditions per place. [2024-11-24 01:53:26,847 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 342 selfloop transitions, 259 changer transitions 0/608 dead transitions. [2024-11-24 01:53:26,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 608 transitions, 9889 flow [2024-11-24 01:53:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:53:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:53:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-11-24 01:53:26,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-11-24 01:53:26,848 INFO L175 Difference]: Start difference. First operand has 160 places, 526 transitions, 7986 flow. Second operand 8 states and 125 transitions. [2024-11-24 01:53:26,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 608 transitions, 9889 flow [2024-11-24 01:53:28,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 608 transitions, 9798 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-24 01:53:28,496 INFO L231 Difference]: Finished difference. Result has 167 places, 529 transitions, 8776 flow [2024-11-24 01:53:28,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7903, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8776, PETRI_PLACES=167, PETRI_TRANSITIONS=529} [2024-11-24 01:53:28,497 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 132 predicate places. [2024-11-24 01:53:28,498 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 529 transitions, 8776 flow [2024-11-24 01:53:28,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:28,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:28,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:28,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:53:28,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:28,699 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:28,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 144171053, now seen corresponding path program 9 times [2024-11-24 01:53:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:28,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74434971] [2024-11-24 01:53:28,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:53:28,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:28,715 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-24 01:53:28,716 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:28,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74434971] [2024-11-24 01:53:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74434971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:53:28,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:53:28,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 01:53:28,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133277256] [2024-11-24 01:53:28,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:28,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:53:28,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:28,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:53:28,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:53:28,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-24 01:53:28,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 529 transitions, 8776 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:28,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:28,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-24 01:53:28,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:34,022 INFO L124 PetriNetUnfolderBase]: 15666/22111 cut-off events. [2024-11-24 01:53:34,022 INFO L125 PetriNetUnfolderBase]: For 281886/281886 co-relation queries the response was YES. [2024-11-24 01:53:34,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135033 conditions, 22111 events. 15666/22111 cut-off events. For 281886/281886 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 130439 event pairs, 1278 based on Foata normal form. 22/22132 useless extension candidates. Maximal degree in co-relation 134954. Up to 10936 conditions per place. [2024-11-24 01:53:34,236 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 902 selfloop transitions, 150 changer transitions 0/1053 dead transitions. [2024-11-24 01:53:34,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1053 transitions, 18890 flow [2024-11-24 01:53:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:53:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:53:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-11-24 01:53:34,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104895104895105 [2024-11-24 01:53:34,238 INFO L175 Difference]: Start difference. First operand has 167 places, 529 transitions, 8776 flow. Second operand 13 states and 219 transitions. [2024-11-24 01:53:34,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1053 transitions, 18890 flow [2024-11-24 01:53:36,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 1053 transitions, 18476 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-11-24 01:53:36,847 INFO L231 Difference]: Finished difference. Result has 184 places, 595 transitions, 10410 flow [2024-11-24 01:53:36,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8581, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10410, PETRI_PLACES=184, PETRI_TRANSITIONS=595} [2024-11-24 01:53:36,848 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 149 predicate places. [2024-11-24 01:53:36,848 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 595 transitions, 10410 flow [2024-11-24 01:53:36,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:53:36,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:36,849 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:36,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-24 01:53:36,849 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:36,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash 874510347, now seen corresponding path program 10 times [2024-11-24 01:53:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:36,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865534226] [2024-11-24 01:53:36,850 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:53:36,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:36,862 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:53:36,863 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:36,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865534226] [2024-11-24 01:53:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865534226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:53:36,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:53:36,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 01:53:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974831838] [2024-11-24 01:53:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:53:36,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:53:36,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:36,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:53:36,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:53:36,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-24 01:53:36,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 595 transitions, 10410 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 01:53:36,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:36,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-24 01:53:36,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:41,447 INFO L124 PetriNetUnfolderBase]: 16909/23858 cut-off events. [2024-11-24 01:53:41,447 INFO L125 PetriNetUnfolderBase]: For 310643/310643 co-relation queries the response was YES. [2024-11-24 01:53:41,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149470 conditions, 23858 events. 16909/23858 cut-off events. For 310643/310643 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 139276 event pairs, 4863 based on Foata normal form. 2/23859 useless extension candidates. Maximal degree in co-relation 149384. Up to 10879 conditions per place. [2024-11-24 01:53:41,950 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 455 selfloop transitions, 288 changer transitions 2/746 dead transitions. [2024-11-24 01:53:41,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 746 transitions, 13847 flow [2024-11-24 01:53:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:53:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:53:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-11-24 01:53:41,952 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-11-24 01:53:41,952 INFO L175 Difference]: Start difference. First operand has 184 places, 595 transitions, 10410 flow. Second operand 7 states and 111 transitions. [2024-11-24 01:53:41,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 746 transitions, 13847 flow [2024-11-24 01:53:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 746 transitions, 13710 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-11-24 01:53:45,610 INFO L231 Difference]: Finished difference. Result has 193 places, 656 transitions, 12525 flow [2024-11-24 01:53:45,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10293, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12525, PETRI_PLACES=193, PETRI_TRANSITIONS=656} [2024-11-24 01:53:45,611 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 158 predicate places. [2024-11-24 01:53:45,611 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 656 transitions, 12525 flow [2024-11-24 01:53:45,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 01:53:45,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:45,611 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:45,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-24 01:53:45,612 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:45,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 701544013, now seen corresponding path program 11 times [2024-11-24 01:53:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:45,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838963789] [2024-11-24 01:53:45,613 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:53:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:45,624 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:45,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838963789] [2024-11-24 01:53:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838963789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877037575] [2024-11-24 01:53:45,717 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:53:45,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:45,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:45,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:53:45,810 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:45,810 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:45,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:53:45,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:45,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:53:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:53:46,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877037575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:53:46,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:53:46,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-24 01:53:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371567020] [2024-11-24 01:53:46,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:53:46,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:53:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:53:46,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:53:46,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:53:46,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-24 01:53:46,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 656 transitions, 12525 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 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 01:53:46,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:53:46,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-24 01:53:46,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:53:53,542 INFO L124 PetriNetUnfolderBase]: 20247/28737 cut-off events. [2024-11-24 01:53:53,542 INFO L125 PetriNetUnfolderBase]: For 394382/394382 co-relation queries the response was YES. [2024-11-24 01:53:53,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183769 conditions, 28737 events. 20247/28737 cut-off events. For 394382/394382 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 172366 event pairs, 1063 based on Foata normal form. 74/28810 useless extension candidates. Maximal degree in co-relation 183678. Up to 6859 conditions per place. [2024-11-24 01:53:53,879 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 462 selfloop transitions, 945 changer transitions 0/1408 dead transitions. [2024-11-24 01:53:53,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1408 transitions, 25223 flow [2024-11-24 01:53:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-24 01:53:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-24 01:53:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 595 transitions. [2024-11-24 01:53:53,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4006734006734007 [2024-11-24 01:53:53,883 INFO L175 Difference]: Start difference. First operand has 193 places, 656 transitions, 12525 flow. Second operand 45 states and 595 transitions. [2024-11-24 01:53:53,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1408 transitions, 25223 flow [2024-11-24 01:53:59,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1408 transitions, 24748 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-11-24 01:53:59,142 INFO L231 Difference]: Finished difference. Result has 236 places, 1062 transitions, 21791 flow [2024-11-24 01:53:59,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11996, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21791, PETRI_PLACES=236, PETRI_TRANSITIONS=1062} [2024-11-24 01:53:59,143 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 201 predicate places. [2024-11-24 01:53:59,143 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 1062 transitions, 21791 flow [2024-11-24 01:53:59,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 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 01:53:59,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:53:59,144 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:53:59,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:53:59,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 01:53:59,344 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-24 01:53:59,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:53:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1196590923, now seen corresponding path program 1 times [2024-11-24 01:53:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:53:59,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113963796] [2024-11-24 01:53:59,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:53:59,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:53:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:53:59,899 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 01:53:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113963796] [2024-11-24 01:53:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113963796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341846679] [2024-11-24 01:53:59,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:53:59,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:59,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:59,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85cd98c2-5c10-4860-9fb4-d8fc9aeb3e36/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:53:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:53:59,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-24 01:53:59,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:54:00,062 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 01:54:00,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 01:54:00,415 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 01:54:00,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:54:00,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-24 01:54:00,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:54:00,894 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 70 treesize of output 62 [2024-11-24 01:54:01,033 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 01:54:01,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341846679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:54:01,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:54:01,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-24 01:54:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660205121] [2024-11-24 01:54:01,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:54:01,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:54:01,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:54:01,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:54:01,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:54:01,312 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-24 01:54:01,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1062 transitions, 21791 flow. Second operand has 25 states, 25 states have (on average 8.24) internal successors, (206), 25 states have internal predecessors, (206), 0 states have call successors, (0), 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 01:54:01,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:54:01,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-24 01:54:01,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:54:10,199 INFO L124 PetriNetUnfolderBase]: 20127/29717 cut-off events. [2024-11-24 01:54:10,199 INFO L125 PetriNetUnfolderBase]: For 475672/478360 co-relation queries the response was YES. [2024-11-24 01:54:10,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198506 conditions, 29717 events. 20127/29717 cut-off events. For 475672/478360 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 203602 event pairs, 1585 based on Foata normal form. 998/30546 useless extension candidates. Maximal degree in co-relation 195148. Up to 22879 conditions per place. [2024-11-24 01:54:10,616 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 1616 selfloop transitions, 160 changer transitions 1/1958 dead transitions. [2024-11-24 01:54:10,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1958 transitions, 42362 flow [2024-11-24 01:54:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:54:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 01:54:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 244 transitions. [2024-11-24 01:54:10,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49292929292929294 [2024-11-24 01:54:10,618 INFO L175 Difference]: Start difference. First operand has 236 places, 1062 transitions, 21791 flow. Second operand 15 states and 244 transitions. [2024-11-24 01:54:10,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1958 transitions, 42362 flow